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4553-1026-D rev A Operation manual_as built

1. 15 Guidelines TOFODOrTALION ner EL cv i vs 17 PERMISSIVE TO S TAR Losa 21 Permissive to Start acia alada alicia 21 FEIS SU TO qu me pis 22 ACTION LIST PRIOR TO START UP 1 crece eere nennen nnnm annm n mana nn manns 23 SAP OF PONS an aa em RAES 25 Start up of pump with wells that are flowing naturally 25 Start up of pump with well that is not flowing naturally 30 NORMAL OPERATION osmosis 36 Normal operation of pump s 11 ccce eer r cere eren rene enne enn 36 Starting up an additional well when the pump is running only C5 and CC 38 Shutting down a well when the pump is running only C5 and CC 41 Start of second pump when first pump is running 42 Stop of one pump when both pumps are running 43 STOP OF THE PUMPS 11 11 eer rere L rere erre LLRE 44 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 3of 110 8 2 Methanol injection after stop shut down 46 9 WELL TESTING WITH MP FM 1 Lee rrr eere L
2. 12 13 14 15 16 Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 16 of 110 Following a pump stop the re circulation loop should immediately be filled with methanol For a prolonged pump shut down the whole FDS should be filled with methanol If a well that is being pumped is closed in the re circulation choke and by pass should immediately open If the well is the last well open this will also cause a pump trip The pump operator can change the operating point by adjusting the pump speed or the opening of the re circulation choke Based on the producing wells a totalised GVF is calculated at the pump inlet conditions This GVF together with pump speed is used to calculate the maximum differential pressure the pump can produce for the given conditions The system will provide alarm and trip if maximum differential pressure Is exceeded A set of conditions will define permissive to start The control system will not allow start up of the pumps unless these conditions are satisfied A set of conditions will define permissive to run The control system will provide alarm outputs if the borderline of these conditions are approached or eventually trip the pumps if these conditions are not satisfied Some of the conditions defining the pump envelope and permissive to run requires knowledge of the actual fluid properties and gas volume fraction at pump suction condition
3. As soon as the reboot is finished and tree controls are up and running again the start up procedure can be followed Pod installation removal The valve pod can be Set up of pump control system with only one pump installed Actions to be carried out according to Pump System Commissioning procedure 4553 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Operation Manual 53 of 110 Checking for hydrat plug in pump module If there is reason to believe that hydrates have been formed for instance after a long period without flow and no methanol injected actions have to be taken prior to start up Pumps are stopped Wells are closed V3 and V4 are open Start injection of methanol Close By pass V3 V7 must be forced If pressure builds up over time there is probably a hydrate plug in the pump line or the recirculation line If so two alternative methods are available o Continue injection of methanol o Reducing the process pressure C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 54 0f 110 14 FAQ FREQUENTLY ASKED QUESTIONS 14 1 FAQ Pump operation Q What is the maximum and minimum speed the pump can operate at A The pump can operate between 1500 rpm and 5100 rpm synchronous s
4. LUF NES ia i FA r EL 7 M Y IMA L T j kg 5 li i L E LUE Me EM kr EE i a e SSS Saas ue cu p EEE EEE RATER A 4 EA NAAA APA A A SS Sy ST PSY il I 4 KR D p L sz f TR EL o Er E Figure 16 36 PGM1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 105 of 110 a LLL A E a E nd ul lp da res lala a um c 0 sc mm o um m m im mama lt a le a le b ba k domo oc _ io li m mom m amm Dam al dm d m cs m m mm m Figure 16 37 High Voltage Switch Board C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 106 of 110 SENDJE PAVI ENGIN ERIN GAS poro ZA RP p Tg s D g E Lll ah a M lo LL Figure 16 38 400 Voltage distribution C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System Operation Manual 03 01 2004 107 of 110 17 APPENDIX B CHECK LIST BARRIER FLUID SYSTEM EQUIPMENT COMPONENTS TAG NO 19 VERIFICATION NOTE LOCATION 1 Shipboard supply lines A amp B to C1 C5 and CC Connected and in good c
5. Q Why does the pop up window for the bypass valve V3 say V3 NOT CLOSED instead of V3 OPEN A The bypass valve is a Fail Safe Open valve The higher actuator pressure therefore indicates when the valve is pushed towards closed position Q Are there any limitations to the operation of the valves when it comes to functionality A V4 is defined as open when it is above 48 start permissive one pump and 95 start permissive two pumps V4 is given a SP of 50 if a pump stop trip occurs Also V3 will open then It is not possible to close V3 while the pump is not running Q Why does the procedure say V4 gt 10 A This is simply because of the S shaped Cv curve for the valve Choking lower than 1096 has no effect on the flowrate constant Cv below 1096 However it is more than sufficient to prevent hydrate formation in the recirculation line even when operating at low differential pressure By limiting it to 1096 you also don t waist time when you want to have open it again Q What do I do if I get lost and are facing the risk of drawing down the well without control C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 56 of 110 A If there is not enough time to let the speed or choke decrease the pump differential quick enough there is and Emergency Stop button on the process screens
6. D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 97 of 110 Tous imme Lima Dame aaa xar Pat wi ual mi um m 4 ss ET omne omm mm T nes x oem do Figure 16 28 VSD amp Trafo C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 980f 110 i i 2 AY Mj Bp y k a Hi IL JE A A A Te i 3 i P tel E i Bees amp f Ma Le ae mi oF j 3 EC sh HEI 3 AS CEIBA Qo LI LU w bul eee P7 A T et a a TAS EE H T FF isme ail m dni reca pl Figure 16 29 MPFM C8 Manifold layout C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 99 of 110 e SENDJE AAA AAA piat INEA L Le 2 E 1 ug neg LM f i E M p M g ye Hy f prem el a pre ee pED Mene A TET o 4 re ra eas UE PEER OC ee M ES Las po rn P me 16 30 MPFM C8 Trend layout C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 100 of 110 FRAMO O ENGINERING ASE Figur
7. Draw down psi Tolerances psi Well D Draw down psi Tolerances psi Hess to define maximum draw down Well A of bottom hole pressure for each well Draw down psi with max min tolerances Tolerances psi Well B Draw down psi Tolerances psi Well C C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 18 of 110 Description Explanation Reference Value Define flow rate at pump inlet Pump suction conditions for the wells that are Suction pressure producing naturally Temperature Flowrate For C5 define if one or two pumps shall be started based on natural production rated and estimated flow rate with target draw down or based on earlier experience Based on natural production flow A start speed giving an inlet flow rate rate select start speed and re circle corresponding to the natural production flow valve position rate shall be selected When the pump is started and the bypass is closed the pump shall operate at a low differential pressure For C1 and CC the re circle valve shall be between 48 and 50 96 open to get permissive to start For C5 the re circle valve position is dependent on if one or two pumps are started With one pump the re circle valve position shall be between 48 50 and with two pumps above 95 to get permissive to
8. z Loc La Ne XT ET mL sites Elu PA B vanam Fou hote too f i T s a MIA QJ LACER LU AAA a LU a EG ee FERAS Tu Ps SE en PE a AAA dl AAA Pe L GN UE ee ae GE aU nu AAA eet Figure 16 19 MPFM C5 Manifold layout C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 910f 110 E O A Taa re deeem nem Justini song FRAMO SENDJE A INLINE E E ENGINEERING AS a F i i Aa ou a I m Figure 16 20 Pump Module C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 92 of 110 T z i A NIE operabe vi s ue me eo Oo o o Figure 16 21 Operate Pop up menu Pump module C8 Figure 16 22 Methanol injection valve pop up menu pump module C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 93 of 110 o gt DlaCB Bypass Yalve vi d A E Li E FO Dn pi F Fare y 1 E B Kk Figure 16 23 By pass valve pop up menu pump modulen C8 1 ee ee a IM m MR MNA OA GN Mam M gt DIgls ESD STOPP vi Figu
9. 19 CX Ul1 150 Figure 16 11 The system supplies pressure topside from a HPU located in the PCM The controls switches are also located in the PCM Ref chapter 2 3 HVAC unit 1 or 2 available The HVAC unit 1 and 2 are located 19 CX UI1300A or topside in the PCM There are 2x70 19 CX UI1300B capacity and at least one of them has to be available in order to get permissive to start the pump VSD ready The variable speed drive and the 19 CX Ul1200A trafo s are shown in Figure 16 18 19 CX Ul1200B They are located topside in the PCM Permissive from Cameron WCS There is one permissive from each 18 CX UIO72 or well The permissive is a common 18 CX UI073 or signal from Cameron that all valves for 18 CX UIO74 or a well is open to the inlet of the FDS 18 CX UI075 To have permissive to start the pumps at least one well must be open Permissive from ABB DCS The permissive are that all valves 18 CX Ul022 topside leading to a separator are open Bypass valve V3 V7 position Operated from a pop up window that TBD open pops up when clicking once on the valve in Figure 16 14 pop up menu shown in Figure 16 15 Recycle valve V4 position open One pump 48 50 Two pumps gt 95 The valve could either be set to a C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System Operation Manual 03 01 2004 22 of 110 No active tr
10. 2 Open bypass valve V3 Open re circulation valve V4 7 7 7 4 8 Check that both pumps have identical differential pressure If one is producing differential pressure and one is not stop the pump that is producing differential pressure wait until the pump running is producing differential pressure and restart the stopped pump Follow procedure 6 1 to restart wells 7 4 10 Re open wells that were shut down according to procedure 7 2 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 43 of 110 7 5 Stop of one pump when both pumps are running One pump can be stopped with one pump running only if the pump is in bypass mode Since this operation includes loss of differential pressure it can be required to shut down wells that are not producing natural before the pump is started to avoid back flow into the reservoir Criteria s Two pumps running By pass mode V3 and V4 open speed below HOLD rpm Description Reference Value 7 5 1 Read the procedure from top to bottom before any action in started 5 2 Shut down wells that are not producing natural if required by pass mode may cause back flow Hess to verify If it is only one well that is not producing naturally route this well through the flow meter initiate the flow meter with the correct well Reduce speed of pum
11. 30 of 110 6 2 Start up of pump with well that is not flowing naturally This procedure gives a step by step procedure to start up wells that are not producing natural Criteria s Pump system is ready to start Pump is by default started on pure liquid maximum speed is 2000 rpm until operation on gas is confirmed Read the procedure from top to bottom before any action in started Check that control fluid system is in operation MERE Check that HVAC is in operation Check that barrier fluid system is in operation Check that VSD is ready to start For C1 check that barrier pressure is regulated according to wellhead pressure or discharge pressure whichever is highest before the well is opened Hess should decide current max draw down and down hole Well ss pressure Also the minimum allowable time to reach the draw Draw down psi down should be given Target DHP should be above minimum Tolerances psi DHP in case of fluctuations Wel Draw down psi Alarm limits on the down hole pressure should be set on the Tolerances psi Cameron PC in the PCR Typical Target 10 psi to notify the Well i operator in the PCR to adjust pump settings Draw down psi Tolerances psi Wells connected Well wera a Draw down psi TulsraHcss d ps web NA cis C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump Syst
12. 87 of 110 Ho Se OUR eS a e M on Li B j 1 y F d D if EXA ET aes PIELES BERRY DRE er pr j F Eaa I ls pos A ae pa SY F n i i J i j m I E z 1 DAS A T ELO TIC TD DG OA Am Pida ds AAA AAA H ee ee Figure 16 16 Barrier fluid system C5 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 880f 110 ez TIT FRAMO 2 _ SENDE gt ENGINEERING ASS oa Ea p EE i Sy n i LEA PE NETTO PAD AA LS PR T UY NC RR OC C eee p uam Dr ONE UNO A e O M Figure 16 17 Control fluid system C5 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 89 of 110 Figure 16 18 VSD amp Trafo C5 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 90 of 110 JA IV i zm Riz Ai I E I JE CEIBA ENGINEERING AS n mme D y 1 T p M wur Io Rm Sea f n KM ALI cfl wl E AECA COM Error sati C2 PLC 00 1 mg m uc a A Un TLL
13. 99 00 06 Fax 47 55 99 92 90 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea Multiphase Pump System Pump System Operation Manual 4553 1026 D A 03 01 2004 10 of 110 1 4 Abbreviations C amp E Cause and effect DHPT Downhole Pressure and Temperature FAQ Frequently Asked Questions FE Framo Engineering AS FMS Frank Mohn Services AS FPSO Floating Production Storage and Offloading Vessel HMI Human to Machine Interface same as OS MeOH Methanol MPV Manifold Pigging Valve OS Operator Station same as HMI PCR Process Control Room PCS Pump Control System PLC Programmable Logic Controller PMV Production Master Valve PT Pressure Transmitter PWV Production Wing Valve SCSSV Surface Controlled Subsurface Safety Valve SP Set Point TT Temperature Transmitter C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 11 0f 110 2 SYSTEM 2 1 Process and Operating Conditions The subsea multiphase pump is designed to be able to give the produced fluid from C1 C5 and CC a pressure increase of up to 40 bar 580psi It is assumed that the static reservoir pressure is sufficient to bring the liquid level above the pump module elevation The methanol and scale inhibitor is the same for the multiphase
14. Control System The Pump Control System comprises a Mitsubishi Q series PLC a control and interface cabinet and subsea interface junction boxes located in the PCM topside The operator s normal interface is a PC LabView application in the Process Control Room PCR A separate manual is made for this application 45532000CD HMI User Manual For detailed operator instructions see Framo doc 4553 1304 D PCS and LV amp MCC Cabinet Operator Manual and 4553 1305 D PCS Cabinet E300 Operator manual For detailed operator instructions for the PCR HMI station see Framo document 4553 1400 D HMI User Manual See also chapter 14 5 for FAQ The LabView application comprises 27 main pictures for the different parts of the Ceiba FFD Multiphase Pump OS LabView System Event Barres fluid system Barrier fluid system Control fluid system Switchboard PM Control fluid system hM P F M MPFM j VSD amp Trafo VSD amp Trato Figure 2 1 LabView hierarchy C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A 03 01 2004 Pump System Mid 13 of 110 Operation Manual Common screens Picture no Figure no Description S O Lo EXE heme 00000000000 Figure 16 3 Home screen 2 Figure 164 Overview O LS Figure 16 5 System overv
15. Q What is the minimum pump suction pressure A It is currently set to 10 bara because of the barrier oil pressure and the water depth Q Do I always have to inject methanol in to the pump module when the pump stops trips A YES At least into the recycle line C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Operation Manual 99 0f 110 Q What do I do after an ESD1 A MeOH should be injected ASAP to both all Pump modules ref 8 2 Q After a start up why does the pump differential pressure have to be reduced in order to keep the downhole pressure constant A It can be several reasons The heavy liquids i e water and oil that was in the flowline prior to start up have been pumped out the watercut has changed the well has stabilised temperatures or flow regimes have changed etc Q Why is the pump increasing or decreasing the speed at a slow rate A First of all the response time from the well and flowline is long and the fluids in the system are compressible In addition the barrier oil pressure needs time to adjust and the umbilical makes the response slower due to its accumulator effect Q How is the bypass valve V3 V7 operated A The bypass valve is operated by pointing on the valve and clicking once with the mouse A pop up window will appear where you can give Open or Close command Valve position is also shown
16. Subsea No 4553 1026 D Multiphase Pump System Rev A Pump System Date 03 01 2004 Operation Manual Page 400f 110 7 2 10 When the wellhead choke is more than 25 open the pump control system will get a well permissive from Cameron The PLC will then recalculate the GVF at pump inlet including the new well Based on the new GVF a new dPmax will be calculated Adjust V4 and or speed if required C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 41 of 110 7 3 Shutting down a well when the pump is running only C5 and CC Criteria s Two wells or more in production 7 3 1 Read the procedure from top to bottom before any action in started 7 3 2 If two pumps running verify from well test and performance envelope if both pumps shall be running after the well is shut down If not shut down pump first and close well while pump is in bypass mode A not naturally producing well may require that the well is closed before the pump is stopped Note By pass mode may require that not flowing wells are shut down and restarted Reduce speed of pump in steps and close wellhead choke of well to be shut down in step to keep constant suction pressure Adjust V4 if required When wellhead choke is less than 25 96 open the well permissive from Cameron is lost PLC will then recalculate GV
17. Why are there 2 tanks for the barrier oil A Oil is filled on the circulation tank A hydraulic pump will force the oil through a water and a particle filter When the oil has the required cleanliness it can be transferred to the system tank by opening the manual 3 way valve Samples have to be taken prior to the transfer The oil that is in the system tank will be supplied to the subsea pump C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Operation Manual 57 of 110 Q When do I pump oil from the recirculation tank to the system tank A There is an alarm when the oil level in the system tank is below 50 This is a reminder to fill oil If oil samples from the circulation tanks have the required cleanliness it can be transferred to the system tank by opening the manual 3 way valve Samples have to be taken prior to the transfer Q Where can I see the tank levels A The tank levels can be seen in the picture Barrier oil system on the OS There are also indicators on the tanks located in the PCM Q Why is the level in the system tank dropping A There should be a small consumption of barrier oil however it is estimated to be less than 1 liter hour typically 0 2 0 4l h per pump If the oil consumption is significantly larger Framo should be notified see chapter 1 3 Q What kind of oil is used as barrier oil A The oil
18. You will be asked for confirmation This will trip the pump immediately 14 2 FAQ Barrier oil system Q What is the barrier oil system A The barrier oil has the following main purposes a Overpressure protection of the pump internals Q Lubrication of bearings and seals a Cooling of the submerged electrical motor Q Why does the barrier oil pressure have to be higher than the process pressure A Because this prevents process fluids to enter the electrical motors seal surfaces and bearings Q Is the barrier oil system operated from the control room OS A No the barrier oil is system is automatically regulating the pressures by looking at the process disharge pressure The operator can monitor the system from the OS Q Do I ever turn the barrier oil system ON OFF A The system should never be turned off It is not possible to turn off the system from the OS anyway In case of power loss the system will restart automatically when power is back again Q What is Shut in mode A 125bara is the maximum process pressure the pump could operate at in running mode The pump will trip if the pressure gets higher However it is recommended to have the same overpressure as in running mode The system will therefore automatically increase the pressure in three steps if required If the process pressure drops again the system will also decrease the pressure automatically to normal mode where the pump can be started Q
19. be taken after circ pump have been run for 24 hour and before transferring oil into the system tank else every 3 rd month Oil is transferred to the system tank by manually switching the 3 way valve from Circulation to Transfer Remember to switch back afterwards System tank 1 2 Sample point labelled system tank Open the tap and drain the first litre Do not touch the tap during sample You need minimum one litre morlina to be able to run the PCM particle counter measurement Take a sample after transferring from circ tank else every 3 rd month C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 70 0f 110 Reference is made to document 4553 1027 D FRAMO FFD Pump System Topside Equipment Maintenance Manual section 3 8 8 15 2 Control valve system NOTE There are TWO different units in the HPU Room in the PCM and it s very important to distinguish these two units This tank for the lip seal and valve control oil is located at the further end The colour on the Oceanic 525 is blue green and it is a water based oil The barrel pump is connected into a filter at the top of the tank and a small button will appear when the filter is clogged Procedure for filling Oceanic 525 1 Take the barrel pump labelled Oceanic 525 out from the housing and coil out the hose 2 Ins
20. from the circulation tank to the system tank Both Barrel pumps are labelled one for Oceanic and one for Morlina VG5 Do NEVER mix the barrel pumps hoses IF THE BARREL PUMP FOR ANY REASON DOES NOT WORK NEVER USE A BARREL PUMP THAT HAS BEEN IN USED WITH OTHER UNKNOWN FLUIDS OR CHEMICALS Procedure for filling Shell Morlina VG5 1 Take the barrel pump labelled Shell Morlina VG5 out from the housing and coil out the hose 2 Insert the barrel pump into a NEW barrel Shell Morlina VG5 3 Connect an air hose into the barrel pump and the pump will start 4 Keep an eye on the level gauge on the tank during filling 5 Do not fill more than 95 on the level gauge 6 Disconnect the air hose when the barrel is empty or the level on the tank is 95 7 Coil up the tubing and insert the barrel pump back in the housing 8 Turn the switch in local 19 CX HS1104A and start the circulation pump 19 CX HS1104 B and let in run in 24 hour Procedure for sampling the Shell Morlina VG5 Circulation tank 1 Open the sample point labelled circulation tank 2 Open the tap and drain the first litre Do not touch the tap during sample C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 69 of 110 You need minimum one litre Morlina to be able to run the PCM particle counter measurement Samples have to
21. only one well that is not producing naturally route this well through the flow meter initiate the flow meter with the correct well Reduce speed of pump until the well is not flowing Then close well Reduce speed in steeps until differential pressure is 3 bar Open bypass valve Stop the pump Let the PCS stop the pump and operate the valves The pump will ramp down according to predefined curve in PLC At 1200 rpm the power is shut down and the by pass V3 and re circ V4 valve will start to open if not already opened A trip wing valve signal will be sent to Cameron WCS if the wells should stay in natural production after the pump stop the trip wing valve signal must be overridden in the Cameron WCS C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 45 of 110 After the pump has stopped open methanol injection valves V8 and V9 and inject 250 L of methanol Methanol injection must be started within 10 minutes after pump shut down For further detail see O For a long term shut down of the pump set the barrier fluid system in Shut In mode first level From Mac panel in PCM For a long term shut down of the pump isolate the pump using the ROV operated valves This is only needed if the well is going to continue production naturally without the pump If ROV is not available in
22. pump system as for any other piping subsea with one exception The recycle line in the module is not insulated and special attention must therefore be given related to hydrate formation This is described in this manual The alarm and trip settings reflect the design process conditions They should not be changed without consultation with FE 2 2 Barrier Oil System Purpose The barrier oil system shall protect the MPP internal mechanical parts from ingress of process fluid and at the same time protect the electrical motor from sea water ingress The oil is also cooling the motor Oiltype Shell Morlina VG5 Cleanliness min NAS class 6 and a maximum water content of 100 ppm Operation The barrier oil system is preset to a certain level above the process pressure The barrier oil system shall at all times be activated even if the pump is not in operation i e shall never be switched off By monitoring trending the barrier oil operational parameters oil consumption the MPP mechanical integrity can be analysed 2 3 Control Valve System Purpose The system supplies hydraulic power to the re circulation valve V4 and the by pass valve V3 or V7 actuators for valve operation Oil type OCEANIC HW 525 Cleanliness Min NAS class 6 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 12 of 110 2 4
23. rpm oet speed to the speed estimated in 6 1 19 Confirm not pure liquid at 2000 rpm Close by pass valve The pump differential pressure should now start to increase If not open by pass valve again and increase speed with 250rpm and then close by pass valve Repeat if necessary Increase speed in steps of 50 rpm adjust wellhead process Typical values choke if necessary to balance wells until target draw down is reached for each individual well At 3000 rpm start to close re circle valve also one at the time It is recommended to stabilise the DHP for at least 30 minutes pr 40 psi drawdown It will be necessary to choke some of the wells to achieve correct draw down for each well Keep V4 at least 15 open Note Allow sufficient time for the production rate and FBHP FWHP to stabilise as the response to pump speed choke position might be slow DO NOT RUSH Keep in mind draw down etc C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 290f 110 Wellhead choke gt 25 open loss of permissive below 25 V3 V7 Closed V4 gt 1596 Note the following Well C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual
24. switchgear systems supply the PCM Utility and Control Systems 2 5 1 VSD System The PCM VSD system comprises one common step down transformer for the two frequency converters one common AC80 control cabinet and two step up transformers For troubleshooting and maintenance reference is made to the following ABB documents C1 C5 C8 3AJG000305 338 345 840 VSD Frequency Converter Firmware Manual 3AJG000305 338 345 841 VSD Frequency Converter Hardware Manual 3AJG000305 338 345 842 VSD Frequency Converter Diode Supply Unit User s Manual 3AJG000305 338 345 843 VSD Water Cooling Section User s Manual 3AJG000305 338 345 844 VSD Bender Earth Fault Monitoring Unit User s Manual 3AJG000305 338 345 845 VSD Control Section AC80 User s Manual 3AJG000305 338 345 846 VSD Frequency Converter Step Up Sine filter for ACS600 User s Guide 3AJG000305 338 345 847 VSD Topside Transformers User s Manual 3AJG000305 338 345 848 VSD Megacon User s Manual 2 5 2 230V 440V Power System The shipboard 440V system supplies the PCM with normal power For detailed operator instructions see Framo doc 4553 1304 D PCS and LV amp MCC Cabinet Operator Manual 230 V For detailed operator instructions see Framo doc 4553 1304 D PCS and LV amp MCC Cabinet Operator Manual and 4553 1305 D PCS Cabinet E300 Operator manual 2 5 3 230V UPS and Normal Power Systems 230V UPS is supplied from the shipboard UPS and supplies the PLC all topsides
25. tripping the subsea pumps A The respective ESD button will trip the HPU pumps only the subsea pumps will continue as long as the pressures are OK Q Can one HVAC unit be stopped without tripping subsea pumps A Yes Q Is it possible to fill oil when pumps are running A Yes Q How do I reset alarms A By pushing the Reset buttons on PCS cabinet Q How do I stop barrier pumps or control fluid pumps if I discover a big leak A By pushing emergency stop buttons in HPU room This will not trip the subsea pumps Q Is it possible to isolate pipes to subsea in case of maintenance repair A Yes look at the P amp ID for this subject Q On differential pressure alarm on filters is there any indication on which filter is clogged A Yes a red pop up flag on the respective filter will indicate clogging C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 660f 110 Q Is it possible to isolate cooling water to HVAC or VSD A Yes look at the P amp ID for this subject Q Is there a light switch for outside inside lights A No fuses are located inside the fuse cabinet Q How do I stop room overpressure fan A By switching of the fuse inside fuse cabinet This is not a normal operation Q How is overpressure inside PCM adjusted A By a sliding damper downstream the ventilation fan
26. water from PCM going A Directly overboard no valves Q Why is water collected underneath the floor in PCM HPU room A Because the HVAC units knock out water from the air and the tray underneath has a water trap to prevent module overpressure to blow out the water causing overpressure to drop Q Where can I find fault messages inside the PCM A All alarms will be displayed on the MAC panel on the control panel front C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 65 of 110 If alarms have not been acknowledged for a long time they might drop out of the MAC panel alarm list By disconnecting and reconnecting the power supply socket on the backside of the MAC panel the alarms will be restored This can be done without tripping the pumps Q Will a smoke detection inside PCM trip the pumps A No smoke detection only gives an alarm in the fire and gas system Q Will manual call point activation inside the PCM stop the pumps A Yes 440V and 6 6kV to PCM will be tripped Q Can the fire dampers be tested without tripping the subsea pumps A Yes a test button inside the HPU room will close the dampers with no indication to the F amp G system The fire dampers have to be manually reset Q Can the emergency stop push button on barrier HPU and Control fluid HPU be activated without
27. water level at before choke current location Liquid density kg m 3 Gas density kg m 3 Water level C1 700 m Liquid level m above pump C5 810m modul CC 785 m Formula to calculated liquid level Based on natural production flow rate estimated production One or two pumps flow rate at target draw down or experience for earlier select if one or two pumps are to be started 5 1 7 Based on natural production flow rate calculate the pump opeed rpm speed that correspond to the natural production flow rate If no wells are producing naturally at a location estimated Pump pressure bara C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 25 of 110 6 START UP OF PUMP 6 1 Start up of pump with wells that are flowing naturally This procedure gives a step by step procedure to start up wells that are producing natural Criteria s Pump system is ready to start Read the procedure from top to bottom before any action in Started Check that barrier fluid system is in operation nad Check that control fluid system is in operation For C1 check that barrier pressure is regulated according to wellhead pressure or discharge pressure whichever is highest before the well is opened Hess should decide current max draw down and down hole VENE pressure Also the minimum a
28. 2 A Pump System 03 01 2004 Operation Manual 840f 110 Pal kl E ru LI GS Fl e WIL a ce A 1 L LI on E Ale al M E ra Asc E rd NE um ur E LE m FL rez MENO E BU Mw D 60 Wd nn m T m a y PAES queer aem pnr ae i Le a A M RM BENI Berner SET Pesos fi e i ey a en mb mm mm ce ae AAA a a ee o a lA o i o de o mn Figure 16 13 MPFM C1 Manifold layout C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 850f 110 ib y LA eu hw LE i i 4 Aat sl lol 2 ERE pE Ju F P E 5 r Fa f IN a a ee Se See ree Pe Soe IEEE eS S PONS SS Oa ei a uL t TEM p c r J A 2c pmi p FE f E J Fm Parm ian p T 3 I F 4 i i T E 5 HE y A mz UE RS AMOR A A AE Figure 16 14 Pump module C5 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 860f 110 Figure 16 15 Operate Pop up menu pump module C5 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual
29. 20 of 110 Change operating point of pump with The pump operating point can be moved right constant suction pressure in the pump performance envelope by opening the re circ valve and increasing the speed in steps open re circ valve before increasing speed Likewise the pump operating point can be moved left in the pump performance envelope by reducing speed and closing the re circ valve in steps reduce speed before closing re circ valve With small steps a constant suction pressure can be maintained Stable unstable well production Recycling more fluid through the recycling line can stabilize an unstable well In principle can a stable well be operated with closed re circulation valve But it is recommended to keep the re circ valve somewhat open after a well start up to gain experience C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 21 of 110 4 PERMISSIVE TO START 4 14 Permissive to start The permissive to start the pump are listed in the table shown below Barrier fluid HPU in operation The barrier oil system is shown in 19 CX Ul1 100 Figure 16 10 The barrier oil system supplies pressure topside from a HPU located in the PCM The controls switches are also located in the PCM Ref chapter 2 2 Control fluid HPU in operation The control fluid system is shown in
30. 3 discharge pressure topside Gas density kg m 3 pressure fluid densities and water depth at current location Liquid Formula to calculated liquid level level in flow line must be above pump module If not fill up flow line with diesel oil Water level C1 700 m C5 810 m CC 785 m 1 bara 14 5 psia 1 bara 0 barg C F 32 5 9 Define if the well is producing pure A flowing well is assumed to produce some gas A non flowing well shall be assumed to produce pure liquid When selecting a pump speed above 2000 rpm the operator will have to confirm that the pump are not operating one pure liquid On pure liquid a differential pressure above TBD bar is expected for one pump in operation with 5096 re circle valve setting and above TBD bar is expected with two pumps in operation with 100 re circle valve setting Adjusting speed or re circle valve to For speeds below 3000 rpm it is preferable to increase differential pressure increase speed to increase differential pressure Above 3000 rpm it is preferable to close re circle valve to increase differential pressure The re circle valve should not be less than 15 open Pump inlet conditions can be stabilized by opening the re circle valve for a pump connected to an unstable well C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual
31. 4553 1400 D SW User Manual HMI System Ceiba FFD 4553 0763 D Control System Graphical User Interface AS A SA 4553 1210 D C1 Pump System Commissioning Procedure 4553 1211 D C5 Pump System Commissioning Procedure 4553 1212 D CC Pump System Commissioning Procedure 4553 1304 D PCS and LV amp MCC Cabinet Operator Manual 4553 1305 D PCS Cabinet E300 Operator Manual 6246 0048 D Subsea Phasewatcher VX Installation and Retrieval Guidelines 6246 0040 D Subsea Phasewatcher VX On Site Commissioning Procedure C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 60f 110 Framo Engineering Drawings Process 4553 0770 2 Ceiba FFD Utility Systems C5 Hydraulic and instrument Basis for Operation and Control 7636 Methanol distribution CEIBAFFD FE AMHE 006 4553 0616 D Operation of Choke and Control Valve 4539 0667 1 Hydraulic Schematic HPU Work Over Systems C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual fof 110 Framo Engineering Drawings Electrical 4553 0596 3 TERMINATION DRAWING INTERFACE CABLE CAMERON WCS TO FE PLC C1 4553 1374 3 TERMINATION DRAWING INTERFACE CABLE CAMERON WCS TO FE PLC C5 4553 1375 3 TERMINATION DRAWING INTERFACE CABLE CAMERO
32. Bleed open control common supply Pl and PIT CX PIT1171 on supply side Drain is closed lines CX XV1175B WEE NE NN NN NN control oil drain lines CX HV1177B PER org leam control supply lines CX HV174B Locked closed C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 110 of 110 LOCATION i Interface pooner are EA indication C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc
33. C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 67 of 110 14 7 FAQ PLC and PCS Heference is made to User manual document 4553 xxxx D Q A How is the PLC restarted after a power shut down The PLC will automatically restart and all control functions will be back to normal Can the subsea pumps be started and operated from the PLC MAC panel Yes all functions for pump operation is available on the MAC panel Does the subsea pumps trip if they are switched from Remote to Local on the PCS panel No but when operating in Local only commands from the MAC panel will be accepted Commands from the operator screen in PCR will not be executed What is a Common Alarm A common alarm is generated every time an alarm is generated Each sub system has a Common Alarm every time there is an alarm in the system ex VSD Common Alarm HPU Common Alarm etc The main purpose of common alarms is if the OS in PCR is out of operation each subsystem has a Common Alarm lamp on the PCS panel front The alarm list in the MAC panel will annunciate each alarm Can people other than Framo representatives do logic changes on the PLC No a special programming tool with the PLC software is needed and logic changes shall not be done by others than Framo Can the PLC be reset when the sub
34. E VA dl FUE be Pa am aem mm Figure 16 6 Alarm list C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 780f 110 HENTET ACH ar peat uk ieri EE Hisar Teena m Ilm REO Im I2 Em on iar Sia NS gu ae lates SG ei We EDI ie TITO DE ux EL m EIE E La c x Carton 1m Pareil e RE pea ENTE LE Tex TU REIR S NE e Ss poss ey ae z us mi po m aa m a E MN A sn IN E DM O E NEU UA HIS Figure 16 7 Event list C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System 03 01 2004 Operation Manual 79 of 110 Er f us a Lil E ge W 7 E A i L 5 F aM MEL JIN AC CEBA mL mS RENE nr Miss 2LL LL Aga eg me iF Y er ie NE A FP LEA i L SEE s ves x a Figure 16 8 Pump module C1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 800f 110 Figure 16 9 Operate Pop up menu pump module C1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphas
35. F and dPmax Adjust V4 and speed if required to satisfy the new operations conditions 7 3 3 7 3 4 7 3 5 Keep on with reducing speed and closing choke until the well is closed Adjust V4 if required 7 3 6 3 7 Check if chokes on remaining wells can be open and pump differential pressure reduced after the well is closed Reduce speed before open choke Adjust V4 if required Follow Cameron Hess procedure to shut down well C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 42 of 110 7 4 Start of second pump when first pump is running One pump can be started with one pump running only if the pump is in bypass mode Since this operation includes loss of differential pressure it can be required to shut down wells that are not producing natural before the pump is started to avoid back flow into the reservoir Criteria s One pump in operation By pass mode V3 and V4 open speed below bypass mode set speed Read the procedure from top to bottom before any action in started 7 4 7 4 Shut down wells that are not producing natural if required by pass mode may cause back flow procedure 7 3 Hess to verify Reduce speed of pump until differential pressure over the pump is 3 bar 7 4 4 4 7 4 6 Reduce speed below bypass mode speed value found in Operate pop up window 1
36. N WCS TO FE PLC C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 80f 110 Mongstad Elektro Drawings PCS Cabinet A AAA Sicom Drawings P397 ATN 001 SCO Al FA 001 TERMINATION DIAGRAM TOPSIDE P397 ATN 001 SCO AI FA 002 TERMINATION DIAGRAM SUBSEA P397 ATZ 001 CONSI MDU User Manual C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 90f 110 1 2 Safety Special requirements All operation and maintenance described in this manual shall only be carried out by skilled trained personnel All work on live or pressurised systems requires trained and skilled personnel authorised for this work All personnel shall be familiar with emergency escape routes first aid and use of fire fighting equipment All working areas shall be kept clean and tidy at all times Any oil or chemical spillage shall be cleaned up immediately All work on HV systems shall be coordinated and supervised by FPSO responsible electrician Prior to work on electrical circuits feeders shall be locked in open position 1 3 Assistance from vendor Frank Mohn Services AS P O Boks 44 Sl tthaug N 5851 BERGEN NORWAY Telephone 47 55 99 92 00 Telephone 24 hours 47 90
37. TRITON Triton Equatorial Guinea Inc Master Service Contract No EQG CON 00196 Service Order No 4 Ceiba FFD Subsea Multiphase Pump Systems Eoo oo oom asean CEN mene o2 18 11 2003 Reissued oroe m me ave Lu e ene oer din Project number Number 7636 4553 1026 D Project Customer Supplier document number ul of sheets Ceiba FFD Subsea NA 110 Multiphase Pump System O Framo Engineering AS 2002 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc 1 1 1 2 1 3 1 4 2 1 2 2 2 3 2 4 2 5 3 1 3 2 4 1 4 2 6 1 6 2 7 1 7 2 7 3 7 4 7 5 Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 20f 110 INDEX INTRODUCTION 4 Reference Documents and Drawings crecer eerrr eene enne 5 Safety Special requiremiebls docte occa cor otu suc vus e ea xU Scd suu Du sno suu vo Su rca dus E nnmnnn donee 9 Assistance from vendor 1 celere LLL cnn cnn 9 ADD eV Sat ana 10 JS e AP e 11 Process and Operating ConditionS nsmnrnnrenenenmnmennnnes 11 Barrier Ol SUS IG 11 Control Valve SY SOM ida 11 CONS ECT 12 El ctrical Systems ia 14 OPERATIONAL PHILOSOPHY 11 eere c LLL rre eren eene eren nane anas nasa snas nnne 15 c
38. ameron manifold Initiate well to be started on flow meter screen in HMI system The HMI system will after 5 min start to display online data from the flowmeter Before the well is opened the flow rate should be zero Check that pump suction pressure is lower than wellhead pressure If not close well choke of the other wells in steps and increase pump speed in steps to reduce suction pressure with constant downhole pressure for the flowing wells When suction pressure is somewhat lower than the wellhead pressure open the wellhead choke in steps and increase pump speed in steps to keep constant suction pressure until the target draw down is reached for the new well Open the well choke very slowly to avoid to fast evacuation of the gas cap if present Use the flow meter to see that the well is starting to flow and to check the actual GVF It might be necessary to draw down the suction pressure further to reach target downhole pressure for the new well In this case the wellhead choke on the other wells must be adjusted to keep the correct downhole pressure for these wells Remember always close wellhead choke before increasing speed and decrease speed before open wellhead choke in this step by step adjustment Adjust V4 if required When wellhead choke is 24 open make a short well test to update the flow data in the PLC C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD
39. and subsea instruments and VSD control system The 230V normal power distribution in the PCM comes from a 440 230V internal transformer located under the PCM raised data floor 230V normal power is used for lighting socket outlets and MCC control voltage For further details see document listed in section 2 5 2 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 15 of 110 3 OPERATIONAL PHILOSOPHY 3 1 General The following operation and control philosophy provides a basis for the operating procedures and the control system specification 1 The pump control system is a stand alone system with minimum of interfaces to other systems 2 Monitoring and control of the pump system including all auxiliaries are through a PLC located in the PCM The primary HMI that communicates with the PLC is an operator station located in the PCR 3 The pump control system PLC and HMI has the following functions Control and monitor the HVAC system Control and monitor the barrier fluid HPU system Control and monitor the valve control fluid HPU system Control and monitor the Framo VSD Control and monitor all FDS actuated control valves and chokes Communicate permissive to start permissive to run alarm and trip signals to the Framo VSD Communicate trip signals to the feeder in the Framo GCM step down transf
40. as cap must be evacuated through flow line Note the following Well Pump suction pressure P Pump A discharge pressure PTO03 Pump A Process temperature TT002 Pump B suction pressure Estimate natural production flow rate including GVF Q m 3 hr Ed NN each well is not available set all wells equal Select if one or two pumps is to be started A or B or MATAA FPS oet re circle valve in correct position V4 position 48 50 to start one pump gt 95 96 to start two pumps Estimate pump speed corresponding pump inlet flow rate equal to the natural production flow rate All requirements to achieve Ready to start in the FE HMI shall now be fulfilled C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual 28 of 110 ua If two pumps are started check that both pumps have identical differential head If one is producing head and one is not stop the pump that is producing head wait until the pump running is producing head and restart the stopped pump The reason for this problem is that one pump was initially filled with mostly gas and one with mostly liquid This causes that the pump operating with gas goes into surge Since the other pump closes the check valve at the outlet the gas is trapped inside the pump Pump is now running in bypass mode at 1500
41. ba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 58 0f 110 14 3 FAQ Valve Control System Q What is the control fluid system Control fluid is supplied to the retrievable solenoid pod that in turn controls the hydraulic operated bypass and recycle valves Do I ever turn the control fluid system ON OFF The system should never be turned off It is not possible to turn off the system from the OS anyway In case of power loss the system will restart automatically when power is back again Is the control valve system operated from the screen OS No The operator can monitor the control fluid HPU system from the OS Are there any requirements for the oil to the lip seal and control valve system Yes the cleanliness of the oil shall be better than NAS class 6 Where can I see the tank level The tank level can be seen in the picture Control fluid system on the OS There are also indicators on the tanks located in the PCM Why is the tank level dropping When the valves are operated the return oil from the actuators is vented to sea and the system has to be re filled from the topside tank How often do we need to refill oil to the control fluid system This is depending on the number of valve operations but a good practice is to re fill when low level alarm occurs at 50 level What happens if the control fluid pressure drops If the control fluid press
42. d to a manifold with 4 well connections If one well has to be started after the pump is running the following procedure should be followed Criteria s At least 1 well in production By pass closed Read the procedure from top to bottom before any action in started Hess should decide current max draw down and tolerances Well Also the minimum allowable time to reach the draw down Draw down psi should be given Target DHP should be above minimum DHP in Tolerances psi case of fluctuations Alarm limits on the down hole pressure should be set on the Cameron PC in the PCR Typical Target 10 psi to notify the operator in the PCR to adjust pump settings Wells connected Weila ci J J WellD NA Ci3 Verify if the second pump has to be started to handle the new flow rate A start up of the second pump requires bypass mode a naturally producing well can then be restarted together with the other wells according to procedure 6 1 Start of the second pump is carried out according to 7 4 Updated flow data in PLC for the actual well Use latest well test for a naturally producing well For a not naturally producing well set Qwater to 1 m 3 hr and Qoil Qgas to zero this gives 096 GVF C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 390f 110 C
43. doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System 03 01 2004 Operation Manual 75 of 110 cy LP m AUS 10 43 06 SH ERAMO SENDJE BN omae ra E ii d UT ae E iss i IU z ENGINEERING AS cesa F Sg eg ee Se oe o M ooo 2 a E A AAA A AAA Se Figure 16 4 Overview C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 760f 110 ji e j i La y SS Sy Ry dl al CST pene ST puerum r a de i ard E I f 4 Wn 1 JA come md mm ba k d Tnm D n mm de LE com me Figure 16 5 System overview C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 71 0f 110 AL Y n pum gu uis i twm p TE anxn Ark c TE iar e 0 II MEN ME ME ENGINEERING AS PA OOO IIA E ae ie LE LELI IL ow LLLI TT JER prenne p yy SSeS SAS pare i inii e MN prem PE er SS Aa dre dun y D SEL E rakana E i T FAR a i 1 I i i AA 7 fa z F RUE Honc ung LET COTUUE Gg UMRRENIOROIFS IRE RES ee RN LF uo mi ad su cul P
44. e 16 31 Trend Historical trend C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 101 of 110 FH AE E j 7 b JA pi fl P am Tre Up Ack Bra en om Jj Y xg oie PHP ee P uU LI EL HE JK MF Lr i i te Ter pal ENE arr IE EI NA CE Mer a Maa E p zT A T 7 F FEET pe ri n e o Pa dm LL B s E i wie SR E Figure 16 32 Trend Real time C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 1020f 110 Figure 16 33 Trend configurations attributes Di HaT rend anigi F i A I amp C1 H5054 Figure 16 34 Trend Tag Configurations Custom menu C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 103 of 110 SENDE 0 De C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 104 of 110 7 HAVO SENDJE dl Lm t us 3 E tt p amp jo jk F E I ar y Fil
45. e Pump Modul Set flow data for each well in PLC to 1 m 3 hr of water rest zero This gives a GVF of 0 Select if one or two pumps is to be started based on expected A or B or production flow rate at target draw down A and B Normally it is required to start only one pump 6 2 17 Check that by pass is open Set re circle valve in correct position V4 position 50 96 to start one pump 100 to start two pumps wm Reset any trips or alarm from HMI system Reset C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 330f 110 The reason for this problem is that one pump was initially filled with mostly gas and one with mostly liquid This causes that the pump operating with gas goes into surge Since the other pump closes the check valve at the outlet the gas is trapped inside the pump Pump is now running in bypass mode at 1500 rpm oet speed to 2000 10 bar 150 psi is expected for one pump in operation with 5096 re circle valve setting CEIBA FFD PUMP HYDRAULIC CHARACTERISTICS ONE SINGE PUMP AT 100 WATER REN ee ALEMAN IS mul LEA N OO LN ZONA NP ANA D 30 000 LIQUID FLOWRATE bpd 500 O e Lu tc D o o LL s 400 E Lu tc Lu LL E a Close by pass valve The pump differential pressure should now start to increa
46. e Pump System 2 A Pump System 03 01 2004 Operation Manual 810f 110 i a E aS rer niet m dk d Er a Fr Des Le B PRE NET Pr IDEE Eas d xeu C AA e ee d T nn Pom M cm W y EIE TEC nm p FRE EU E LAA ET pr a Al E ia E mL F El V LUE F baat p F Ta ap ie A pens E hes casa ai me 0 as ci om do ic am mS ci e aa eR be de i eh Mac cs Be a dd di Mon mn ee me 5 h ee I Figure 16 10 Barrier fluid system C1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 82 0f 110 CERAM OG ENGINEERING AS x aT J EIE PAP gt p ermm pee F a Y ace a 3 TL o 24 7 pr eS Eee aS Soe pe cM PSA res pass F rr i PEA FES Ier ps i 7 k E 1 E i wmm uma bl ac TR em mm im rx AA A AA emo aa b NENA T mom c un lim mama AAA EA AAA Figure 16 11 Control fluid system C1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 83 of 110 F ey RAMO Tah Lo LATTE ELT EXE aiam d J LA ER 3 d 1 EN E Figure 16 12 VSD amp Trafo C1 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System
47. e Y axes can be set by clicking on the max and min value When try to zoom in the data the pictures jumps back to original What should do You have to switch from Live trending to Lock by Clicking the switch in the lower right corner Lock s Live Trending I want to look at data that are older then the data in the current picture What should do The historical trend window allowed you to look at older data Can see trends of other tags Using the Custom trend window you can trend any Tag nr Maximum 10 Tag s in the Trend window I am requested to save data to a file and e mail them to someone How You need to do as follows C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 63 of 110 Find out which tags you should retrieve from the data base Go the Print Save Exit menu F 12 Click off the Interpolate data Interpolate a Select the time frame you want data from renin Le EH II M 25 11 2002 Stop cima Q Select the tags you want to write to a file If you have more than 6 tags you can get more by clicking here A A Press the Write button Select file location and save the file The file can now be send to a floppy disc and e mailed NOTE If the file becomes too big for a floppy disc change the stop time and generate two or more files
48. e test must be accepted or rejected Pushing the accept button will store the new test data into the database and back into the PLC as new flow data for this particular well If the reject button is pushed the data is lost C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 48 of 110 The download button allowed the user to store well test data from test separator or earlier test data back into the PLC Well tests at different locations C1 C5 amp CC can be taken simultaneously C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System i 03 01 2004 Operation Manual 49 0f 110 10 PRESSURE TESTING OF FLOW LINES RIGID JUMPERS For pressure testing of flow lines reference is made to the following procedures C1 4553 1021 D C1 Start up procedure C5 4553 1022 D C5 Start up procedure CC 4553 1023 D CC Start up procedure 11 PIGGING OF FLOW LINES For pigging of flow lines reference is made to the following procedures C1 4553 1021 D C1 Start up procedure C5 4553 1022 D C5 Start up procedure CC 4553 1023 D CC Start up procedure C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System S A Pump S
49. eere eene e enean snas cre ennenen annus 47 10 PRESSURE TESTING OF FLOW LINES RIGID JUMPERS 49 11 PIGGING OF FLOW LINES 2 2 8 49 12 PREPARATION OF FDS TOINSTALL RETRIVE MPP MPFM AND RE CIRC CHOKE ninia 50 13 SPECIAL OPERATIONS csiisncecstucsnscnieccscccnsscesctilecceserecsncesduaceuceseseeccteveccuscuecsncsstuassccemneese 52 14 FAQ FREQUENTLY ASKED QUESTIONS ccce erre rennes 54 144 FAQ Pump OpDerallON ES EEN 54 14 2 FAQ Barrier oil system 22222s seer rca 56 143 FAQ Valve Control System eere erre LL rere ires eene nennen ananas aan nana 58 144 FAG VSD and FAO sonar 60 mS Sensu IE PCR ip E a N Ea 62 14 6 FAQ PCM utilities 1 cere ELLEN 64 147 FAQ PLC ARR danaa aiaa Aaaaoi diaaa kidean edni 67 15 MAINTENANCE 68 15 1 Barrero SY SUCI aie encia 68 15 2 Control valve system 1 leere LLL eee Leere essere eene e nans nana snas aas rra 70 153 o 71 15 4 Power and Control Module Leere erre erre ener renean n annn 71 16 APPENDIX A HMI PICTURES ii 72 17 APPENDIX B CHECK LIST BARRIER FLUID SYSTEM 107 18 APPENDIX B CHECK LIST CONTROL FLUID HPU 109 C Training 76369018 Dokument 4553 1026 D rev A Operati
50. elow the trip level Low supply pressure of the control fluid will not cause a pump trip but it will be impossible to operate the bypass valve V3 re circulation valve V4 and methanol injection valves V8 amp V9 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 23 of 110 5 ACTION LIST PRIOR TO START UP Before any pump is started the following activities should be performed Define number of wells to be started and clarify if the wells are producing natural or not Well id Naturally Not naturally producing producing Hess to define maximum draw down of bottom hole pressure for each well with max min tolerances Draw down psi Tolerances psi Well Draw down psi Tolerances psi Well Draw down psi Tolerances psi Well Draw down psi Tolerances psi C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 24 of 110 Estimate production flow rate for wells that are producing natural if not possible to estimate well by well set all wells equal the dPmax calculation is base on the GVF Qwate r m hr liquid level in flow line based on pump suction or discharge Topside pressure psi pressure topside pressure fluid densities and
51. em Rev Pump System Date 03 01 2004 Operation Manual Page 310f110 Note the following Well Y BERNER bara ara 1 bara 14 5 psia 1 bara 0 barg C F 32 5 9 Open wells that are not producing natural according to Hess procedure FPSO production system topside is prepared for production from the well Check that the ABB screen is showing the same routing as the actual routing M10 M11 or M10 test i e ESD valves to the actual separator Note the following Well Pump A suction pressure Pump A discharge pressure PT003 Pump A Process temperature TT002 _ Cd bara ara C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 320f 110 Let pressures and temperatures stabilize for 1 hour or until pressure and temperature have stabilized Gas cap must be evacuated through flow line Note the following Well Down hole pressure Wellhead pressure Wellhead temperature Wellhead choke position Pump A suction pressure Pump A discharge pressure PTO03 Pump A Process temperature TT002 Pump B suction pressure Estimate liquid level in flow line based on pump suction pressure topside pressure before choke and densities Topside pressure psi Water levels C1 700 m C5 810m CC 785 m Liquid level m abov
52. ert the barrel pump into a NEW barrel Oceanic 525 3 Connect an air hose into the barrel pump and the pump will start 4 Keep an eye on the level gauge on the tank during filling D Do not fill more than 95 on the level gauge 6 Disconnect the air hose when the barrel is empty or the level on the tank is 95 T Coil up the tubing and insert the barrel pump back in the housing 8 Turn the switch in local 19 CX HS1153 A and start the circulation pump 19 CX HS1153 B and let in run in 24 hour Procedure for sampling the Oceanic 525 1 Sample point is labelled oceanic tank Always take a sample after the circ pump has been run for 24 hour else every 3 rd month 2 Open the tap and drain the first litre Do not touch the tap during sample 3 You need minimum one litre Oceanic to be able to run the PCM particle counter measurement Reference is made to document 4553 1027 D FRAMO FFD Pump System Topside Equipment Maintenance Manual section 3 8 9 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System 03 01 2004 Operation Manual 71 of 110 15 3 VSD The PCM VSD system comprises one common step down transformer for the two frequency converters one common AC80 control cabinet and two step up transformers For troubleshooting and maintenance reference is made to the following ABB documents Reference is als
53. g ID on these valves Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 108 of 110 EQUIPMENT COMPONENTS TAG NO 19 VERIFICATION NOTE LOCATION High pressure dual filter OX FF128 Selector handle to No diff press w press diff transmitter CX PDSH 1109 point in direction of alarm trigged filter to operate No PDA indication ite NN RN point at high pressure filter outlet circulation tank circ circuit CX PDSH 1107 alarm trigged Mis oe mL point at low pressure filter inlet 3 way valve circulation filling on CX HV123 Handle in poistion barrier oil circulation loop located on circulation circulation tank tank circulation circuit CX PDSH1108 alarm trigged Level glasses transmitters on system CX LG1106 LT1106 In operation and and circulation tank CX LG1105 LT1105 active Isolation valves open Instruments transmitters on barrier oil CX PI1114A Block amp Bleed open supply line Pl and PIT CX PIT1110A on supply side CX PIT1113A Drain is closed CX PI1114B CX PIT1110B OX PIT1113B 23 Solenoid valves on barrier oil supply CX XV 111A BF love 24 Solenoid valve on barrier oil supply line xum CS DS Air vent filter on circulation tank CX FF121 No red pop up System tank is Indication vented into circ tank ar ee a supply branch CX HV133A ME RE supply branch CX HV133B C Training 76369018 Dokument 4553 1026 D rev A Operation manua
54. iew not shown in hierarchy L4 Figure 16 6 Alarm list 5 Figuei67 Eventlist Pump System Screens C1 C5 and CC C8 Figureno Description CC C8 6 12 18 Figure 16 8 Figure 16 14 Figure 16 20 Pump Module CX with pop up menus Figure 16 9 Figure 16 15 Figure 16 21 Figure 16 22 Figure 16 23 Figure 16 24 Figure 16 25 7 13 19 Figure 16 10 Figure 16 16 Figure 16 26 Barrier fluid system CX 8 14 20 Figure 16 11 Figure 16 17 Figure 16 27 Control fluid system CX 9 15 21 Figure 16 12 Figure 16 18 Figure 16 28 VSD amp Trafo CX 10 16 22 A Figure 16 13 Figure 16 19 Figure 16 29 MPFM CX Manifold layout 10 16 22 B Figure 16 30 MPFM CX Trend layout 11 17 23 A Figure 16 31 Trend CX Historical data 11 17 23 B Figure 16 32 Trend CX Real time data with pop up Figure 16 33 menus Figure 16 34 Topside Power System Picture no Figure no Description Figure 16 35 GCU Figure 16 36 PGM1 Figure 16 37 High Voltage Switch Board Figure 16 38 400 Voltage distribution The pictures are shown in section 16 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System i 03 01 2004 Operation Manual 14 0f 110 2 5 Electrical Systems The PCM electrical systems comprises the VSD for C1 C5 and CC including topside and subsea transformers and frequency converters A 440V power supply and 230V UPS from shipboard
55. in the two individual circuits in the WCU will cause the adjacent frequency converter to trip C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Operation Manual 61 of 110 Q The VSD room temperature is rising due to HVAC failure will this cause the pumps to trip A Eventually yes At 40 degrees C a VSD room temp high alarm will occur and at 42 deg C trip the VDS s C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 62 0f 110 14 5 FAQ HMI in PCR Reference is made to HMI User manual document 4553 xxxx D Q What happens if the PC is shut down because of a power failure The PC restarts by itself Login as Operator There is no password If the HMI screen freezes what do I do An alarm for Ethernet PLC communication fault will indicate on top of the screen picture There are several ways of getting the communication back the easiest is to reboot the HMI computer by switching it off and on I press Update but ACTUAL S P is not updated The communication from HMI to PLC is probably down A restart of the PC in the PCR is required In the trend pictures cannot see all tags in the graph The scale has to be reset to fit all 4 lines The maximum and minimum value of th
56. instead DOOD C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 64 0f 110 14 6 FAQ PCM utilities Q Why is it necessary to keep the outer door closed in the PCM A The PCM is designed for zone 2 environment and therefore has a sensor monitoring the overpressure inside giving an alarm if the differential pressure between inside and outside is below 0 2 mBar 20mmwg Leaving the door open will also allow humid air to enter the PCM The air conditioning units are not only controlling the indoor temperature but also air humidity Moisture is knocked out of the air by cooling down below the dew point and if the cooling demand is low i e VSD not running the cooled air is re heated to sustain correct room temperature Q If both HVAC units trip would also the pumps trip A No only if the temperature in the module exceeds 42 degC Q How is overpressure maintained in the module A By an overpressure fan located close to access entrance Q When will the fire dampers close A If the PCM looses power supply and UPS fire dampers will close Q What is regulating the water supply to the PCM A An automatic valve Q Does the trapped water underneath the HPU room floor need to be drained A No water in the tray is drained through a water trap to the outside of PCM Q Where is return
57. ion naturally without the pump C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 47 of 110 9 WELL TESTING WITH MPFM One of the suction branches to the pump has a multiphase flow meter installed This flow meter shall be used to do flow measurements of each well The flow data from the flow meter are also used as input to the total GVF calculation in the PLC Criteria s Pump in stable operation Read the procedure from top to bottom before any action in started Check in HMI system which header the well for test shall be routed to Operate manifold valves from Cameron system so that only the well for test is routed through the MPFM Do not close both manifold valves for a flowing well at the same time open first both and then close the original open Select the well for test in the HMI system Press the Initiate button This action will send a new data set from the flow computer located in the PCM down to the flow meter This operation takes about 5 min When the start button is highlighted the system is ready Press start The top row of the well test table will now display continues average well data Trended online data is shown in the trend window below the table The test continues until the stop button is pushed To stop test press stop After a test is carried out th
58. ips or alarms All process and barrier parameters within normal range percentage value or stepped step by step There are 134 steps from open to close All trip and alarm has to be acknowledged to get permissive to start No LED indicator in Operate POP UP menu is showing this A process parameter that is outside normal range will cause an alarm trip until it is within his normal range Ready to start All the permissive above has to be OK to get ready to start 4 2 Permissive to run The permissive to run are listed in the pop up windows shown below Permissive from Cameron WCS 18 CX UI072 or 18 CX UI073 or 18 CX UIO74 or 18 CX UI075 Permissive from ABB DCS 18 CX Ul022 BEEN ae There is one permissive from each well The permissive is a common signal from Cameron that all valves are open from the well to the inlet of the FDS To have permissive to run the pumps at least one well must be open one permissive from Cameron WCS If the permissive from one pump is lost the by pass valve will open and the pump speed will be reduced to 2000 rpm The permissive are that all valves topside leading to the separator are open Any pump system parameter exceeding the trip limit lowlow or highhigh will cause a pump trip It should be noted that the pumps can be running even if the barrier fluid HPU and control fluid HPU is out of operation The pump will only stop if the barrier pressure vs process pressure is b
59. is a Shell Morlina VG5 No other oil can be used Q Are there any requirements to the barrier oil A Yes cleanliness min NAS class 6 and a maximum water content of 100 ppm Q What is the purpose of local remote switches for the HPU pumps on the control panel front A By switching a pump to local the pump can be started and stopped from the control panel front Even if the pump is in manual it will stop if maximum pressure is reached During transfer of oil from the circulation tank to the system tank the circulation pump has to be switched to local and manually operated from the panel front The pump will stop when system tank level has reached 9595 but the operator still has to closely watch the system tank level Q What happens if the two main and back up pumps are switched to Local A Switching both pumps to local at the same time means that the pumps no longer are operating with respect to the system pressure That means that the HPU is not in operation and a HPU Tripped alarm will be initiated Q Will an HPU Tripped indication trip the subsea pumps A No the subsea pumps are tripped based on the subsea barrier oil pressures An HPU trip will not affect these pressures immediately but as pumps consume oil the subsea pressure will fall and consequently if the HPU is not feeding oil to subsea the pump will eventually trip C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Cei
60. ject MeOH and close V4 after filling Follow Cameron Hess procedure to shut down well NENNEN C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 46 0f 110 8 2 Methanol injection after stop shut down In case of a trip of the pump it is not possible to follow the normal procedure for methanol injection as for a planned stop of the pump Below is shown a contingency procedure Keep in mind that the recycle line is not insulated Criteria s Pump has tripped or is going to be stopped Methanol injection should be started within 10 minutes after the pump has stopped For a planed pump stop point 8 2 2 and 8 2 3 in this procedure should be carried out before the pump is stopped Check that topside methanol pumps are running Open topside methanol injection valve to pressurise the MEM methanol line in the umbilical Inject 250 litre of methanol to protect re circulation loop lf pump is to be restarted within HOLD hours methanol injection can be stopped otherwise continue methanol injection until the complete module is filled up total 1300 litres After the module is filled up closed the V4 to stop any flow through the re circle line For a long term shut down of the pump isolate the pump using the ROV operated valves This is only needed if the well is going to continue product
61. l as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System i 03 01 2004 Operation Manual 109 of 110 18 APPENDIX B CHECK LIST CONTROL FLUID HPU LOCATION ees ewe eae good condition 2 System commissioning IA MEN Pe O ree uper tank pes RET or better MEN NENNEN NN CX VX170B ee oma ee accumulator oil inlet CX HV169 IE NN NNI EE accumulators these valves MEAM NENNEN CX PSV164B mimm E DS CX PSV161 Mal ama ewe 0 0 safety valves supply line CX HV166 Manual isolation valves oil supply Pump suction Locked open No tag ID on pumps on system tank CX Pump discharge Locked open these valves PB151 152 CX HV180 CX HV181 on system tank CX PB151 152 these valves Manual isolation valves circulation pump CO PB153 these valves TB150 these valves High pressure oil dual filter CX FF162 Selector handle to No diff press w press diff transmitter CX PDSH 1163 point in direction of alarm trigged filter to operate No PDA indication Low pressure single filter on fluid tank CX FF156 No PDA indication No diff press circ circuit CX PDSH1154 alarm trigged Level glass transmitter on tank CX LG1155 LT1155 In operation and active Isolation valves open 19 Instruments transmitters on valve CXPIT1176A Block amp Bleed open control supply lines PIT CXPIT1176B on supply side Drain is closed 20 Instruments transmitters on valve CX PI1159 Block amp
62. llowable time to reach the draw Draw down psi down should be given Target DHP should be above minimum Tolerances psi DHP in case of fluctuations Wel Draw down psi Alarm limits on the down hole pressure should be set on the Tolerances psi Cameron PC in the PCR Typical Target 10 psi to notify the Well operator in the PCR to adjust pump settings Draw down psi Tolerances psi Wells connected Well ds _Well A ci J J nm Tolerances psi WelD NA Ci3 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 260f 110 Well Y BERNER bara ara 1 bara 14 5 psia 1 bara 0 barg C F 32 5 9 Open wells that will produce natural according to Hess procedure FPSO production system topside is prepared for production from the well Check that the ABB screen is showing the same routing as the actual routing M10 M11 or M10 test i e ESD valves to the actual separator C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 27 0f 110 Let flow rates pressures and temperatures stabilize for 1 hour or until pressure and temperature have stabilized G
63. o made to document 4553 1027 D FRAMO FFD Pump System Topside Equipment Maintenance Manual section 3 8 1 3 15 4 Power and Control Module Reference is made to document 4553 1027 D FRAMO FFD Pump System Topside Equipment Maintenance Manual section 3 8 1 3 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 72 of 110 16 APPENDIX A HMI PICTURES Event Owardieny Barrier fluid Barrier fluid RC Fa EE system Switchboard Control fluid EAR system MPERMA i VSD amp Trafo Control fluid system C i VSD 4 Trafo Il VSO amp Trafo Trend Figure 16 1 HMI hierarchy C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 30f 110 ERAIVIC SENDJE ENG N RIN AS CEIBA WIE LETE i mper d Hierachy Figure 16 2 Home screen C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 74 01 110 Figure 16 3 HMI configurations parameters C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built
64. on manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 4 of 110 1 INTRODUCTION This documents covers the operation and maintenance of the Ceiba FFD Multiphase pump system including operation and maintenance of the following items e Subsea Framo Dual Pump Station FDS o Multiphase Pump o Multiphase Flow Meter o By pass valve o Re circulation choke e Topside Power and Control Module PCM o Barrier Fluid HPU o Control Fluid HPU o VSD Operation and maintenance of topside power generation system should be carried out according to 4553 1028 D Correct operation of the Ceiba FFD subsea multiphase booster pumps is critical for optimised well production and also important for safe operation of the pumps This document describes operation of the pumps and auxiliary system This document applies for operation of the Framo Multiphase Pumps located on C1 C5 and C8 CC on the Ceiba field C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System S A Pump System 03 01 2004 Operation Manual Sof 110 1 1 Reference Documents and Drawings For detailed information maintenance and troubleshooting a number of documents and drawings may be required Some operation requirements also refer to other documents listed below Operation and Maintenance Manuals Commissioning Procedures
65. ondition 2 System commissioning Terminated Systemisready Shell Morlina VG5 the tanks or better o a No tag ID on these valves Hydr oil on system tank and circ tank Accumulators Manual isolation valves on accumulator oil inlet 7 Manual isolation drain valves on accumulators supply lines supply pumps Manual isolation valves of pressure safety valves barrier oil supply line 10 PB101 102 1 2 Manual isolation valves barrier oil circulation pump CX PB103 on system tank CX TB100 13 Manual isolation valves barrier oil circulation pump CX PB104 on circulation tank 1 Manual isolation valves barrier oil supply pumps on system tank CO 1 CX TB101 14 Manual drain valves on HPU tank TB Tank bottom Locked closed No tag ID on 100 amp 101 these valves C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc CX TB 100 CX TB 101 CX VX140A CX VX141A CX VX142A CX VX140B CX VX141B CX VX142B CX HV130A CX HV135A CX HV143A CX HV130B CX HV135B CX HV143B CX HV136A CX HV144A CX HV145A CX HV136B CX HV144B CX HV145B Locked closed CX PSV138A CX PSV138B CX PSV126 CX PSV127 CX HV137A CX HV139A CX HV137B CX HV139B Pump suction Pump discharge CX HV112 CX HV113 gt mM Locked open No tag ID on Locked open suction valves Locked open No tag ID on these valves Pump suction Locked open No ta
66. ormer Communicate trip signals to the Cameron WCS one hardwired permissive from each well Communicate trip signals to the ABB DCS one hardwired permissive Communicate with the MPFM flow computer Monitor all FDS instruments ex MPFM Monitor GCM step down transformer Monitor VSD step up transformer Monitor FDS step down transformer Monitor Cameron well x mas tree and manifold pressure temperature and valves positions 4 Operation of the pumps start stop and change in operating point is performed by manual step by step procedures allowing safe operation at all intermediate stages without any time critical constraints 5 The pumps can only be started in by pass mode 6 The two pumps in each FDS can be operated individually one at the time or simultaneously If both pumps are used they are started and stopped simultaneously and have identical speed reference 7 one pump is running the other pump is only allowed to start when the pumps are in by pass mode Likewise a pump can be stopped in by pass mode with the other pump running 8 The pumps should normally be started on natural flowing wells before any wells that are not flowing naturally are routed through the pumps 9 When a pump stop shut down is initiated the pumps should immediately be set in by pass mode If both pumps are stopped this will cause a trip signal to Cameron WCS C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc 10 11
67. p until the well is not flowing Then close well 5 8 Reduce speed of pumps until differential pressure over the pumps are 3 bar 7 5 5 Open re circulation valve D Reduce speed below bypass mode speed value found in Operate pop up window 7 5 7 Stop pump A or B To bring the pump running back in normal operation follow the start up procedure 6 1 For a long term shut down of the stopped pump set the barrier fluid system in Shut In mode first level From Mac panel in PCM C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 44 0f 110 8 STOP OF THE PUMPS The PCS is made such that the operator can press STOP PUMP from any operating point The system will slowly reduce the pump speed The power is cut when the pump differential pressure is below 3 bar When the power is cut the by pass valve V3 and re circulation valve V4 are automatically opened However it is recommended to stop the pumps manually Criteria s One or two pumps running Read the procedure from top to bottom before any action in started Check that topside methanol pumps are running Open topside methanol injection valve to pressurise the methanol line in the umbilical Note volume displayed at flow counter Shut down wells that are not producing naturally if required EM Hess to verify If it is
68. peed Q What is the minimum recommended pump speed for continuous operation A It is not critical but it is recommended to keep the speed above 2500rpm If DHPT demands a lower speed further opening of the recycle valve will hold the target pressure whilst speed remains constant at 2500rpm Q What is the effect of increasing the pump speed A Increasing the pump speed will reduce the pump suction pressure and consequently the wellhead and downhole pressure Decreasing the speed will likewise increase the pump upstream pressures Q What is the effect of reducing the V4 choke opening A Choking the recycle line will reduce the pump suction pressure and consequently the wellhead and downhole pressure And vice versa Q The downhole pressure is unstable Why A The downhole pressure can be unstable for several reasons There could be slugging in the well at wellhead or in the flowline It could also be changing of speed and or choke settings too fast unstable regulation The best advice is to wait and to adjust only speed or only choke at a time In some cases it may be wise to increase opening of V4 to stabilise the pump conditions Things may also become more stable as temperature increases in the flowline Q What is the maximum pump differential pressure A Maximum is 40 bar the pump trips at 42 bar Remember that the drawdown limitations in the well can occur with a lower pump differential pressure than 40 bar
69. r Check alarm event list on OS A Loss of 6 6kV feeder to the PCM will cause the VSD to trip The main contactor must be switched back on when the HV power is back A A pump trip might cause an inhibit of VSD ready signal press the reset button on HMI or VSD reset button on control panel front Q How do I reset a VSD trip A Close the main contactor with the switch on VSD panel the press VSD reset button on Pump Control System panel in PCM Q VSD give no speed after start is initiated A First attempt is to try for a new start If the Frequency converter is not getting the speed reference signal reset the profibus communication by switching off and on power to the ABB AC80 control unit Q Step up transformer is overheating A If the S U trafo gets a High temp alarm the pump speed should be reduced to decrease the trafo load thus lowering the temperature If a HH alarm occurs the VSD system will trip and the pump will have a fast ramp down stop fast ramp down is full speed to stop in 10 seconds Q Step down transformer is overheating A If the S D trafo gets a High temp alarm at least on of the pump s speed should be reduced to decrease the trafo load thus lowering the temperature If a HH alarm occurs the VSD system will trip and the pumps will have a fast ramp down stop fast ramp down is full speed to stop in 10 seconds Q Will a Water Cooling Unit failure cause the pumps to trip A Yes any failure
70. re 16 24 ESD pushbutton pop up menu pump module C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 94 of 110 5 DigSanidit alibration vi SAND CALIBRATION TABLE Fw tro ep i NM E E 1800 ET 1 5 fim E 12 0 fo iso Mao so so ipe lL at iB fasoo Ear Bm xe fm ETS Drm 13 0 SO 5500 Figure 16 25 Clamp On Sand Detector calibration table pop up menu pump module C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System 2 A Pump System 03 01 2004 Operation Manual 9501 110 PRS a Fn ee E up Ld LA oso re i om dd AAA ds A ala os TE CXU Inii imit ALA e TIE rt FILM Lak mu ir 4455 2 Faser Mie modom m mimi WEE ERI cis CR b ode o ed ala Figure 16 26 Barrier fluid system C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System SA Pump System i 03 01 2004 Operation Manual 96 of 110 m aa Ar 3 i 4 S FLA Fu Mo Els ENDJE P adn M ENGINERING AS ES d Ss gt T E m A MT Figure 16 27 Control fluid system C8 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026
71. riteria s Pumps started and in stable operation In the HMI system the estimated GVF that the pump are operating is display The GVF is based on the latest well test data stored in the PLC Therefore a change in flow conditions from one of the wells requires a new well test Do well testing regular to have correct flow data in the PLC for each well Based on GVF from the well test data and speed the dPMax is calculated The dPmax value is displayed in the HMI The pump differential pressure should never be higher than the dPmax value The dPmax value will be lower than the alarm limit for high differential pressure at low speeds and high GVF s If the pump is operating close to the dPmax open V4 and increase speed in steps to get higher margin to dPmax Hemember to keep constant suction pressure during this operation C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo Pump System 03 01 2004 Operation Manual 37 of 110 7 1 3 The maximum operation speed of the pumps operating at single phase liquid is set to 2000 rpm a PE C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 38 of 110 7 2 Starting up an additional well when the pump is running only C5 and CC Both C5 and CC is connecte
72. s These parameters may be given as manual inputs or computed by the control system based on well test data and the actual wells that are pumped C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 1701 110 3 2 Guidelines for operation Since the properties of each well is different and the well characteristics changes over time it is not possible to stat exact speed and re circulation valve setting for each location The operator has to define these setting prior to a start up The guidelines given in this section should give the operator knowledge to define the start up settings Description Explanation Reference Value Number of wells to be produced C5 and CC have both the possibility to connect 4 wells C1 only one re any of the wells producing Define which wells that are producing naturally or not Wells flow naturally to be started first Wells that are not producing naturally to be started one by one after the naturally producing wells are started naturally A flowing well can be recognised by a increase in wellhead temperature after the well Are any of the wells not producing is opened and production to topside separator naturally If a non producing well needs heavy kick starting it can be convenient to stat this well first and open the other wells one by one afterwards
73. se On pure liquid a differential pressure of C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc 6 2 27 When operation on gas is confirmed conditions one at the time Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 340f 110 Increase speed in steps of 50 rpm adjust wellhead process choke if necessary to balance wells until target draw down is reached for each individual well It may be wise to open the re circle valve and increase speed to get more stable operating Current valve positions should now be SCSSV1 Open PMV Open PWV Open Wellhead choke gt 25 open loss of permissive below 25 V3 V7 Closed V4 gt 10 draw down with the current speed but speed must be kept 2000 rpm until GVF gt 5 is confirmed It is recommended to stabilise the DHP for at least 30 minutes pr 40 psi drawdown It will be necessary to choke some of the wells to achieve correct draw down for each well Allow sufficient time for the production rate and FBHP FWHP to stabilise as the response to pump speed choke position might be slow DO NOT RUSH Keep in mind draw down etc C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea No 4553 1026 D Multiphase Pump System Rev Pump System Date 03 01 2004 Operation Manual Page 350f 110 Well Down hole pres
74. sea pumps are running No a PLC reset will switch of the system and everything will stop How do find the alarm and trip set points By entering Main Menu on the MAC panel enter the subsystem ex HPU enter Parameter Settings and scroll down to the desired tag no Is it possible to change set points when the system is in operation Yes but a password is required to do any changes Parameter set point changes shall not be done without consulting Framo C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo A Pump System i 03 01 2004 Operation Manual 680f 110 15 MAINTENANCE 15 1 Barrier oil system NOTE There are TWO different units in the HPU Room and it s very important to distinguish these two units The tank for the barrier oil is located next to the exit door There are two tanks in this system One circulation tank and one system tank The barrel pump is connected to the circulation tank through a filter at the top of the tank and a small button will appear when the filter is clogged The oil has to circulate for a while before you can transfer it into the system tank Do always take an oil sample and make sure that the oil has the correct criteria before transferring NAS class 6 or better and maximum 100 PPM of water The three way valve has to be switched from Circulation to Filling position for transfer of oil
75. start Producing wells shall prior to pump The pumps ability to generate differential start up be opened to allowed flow pressure on pure gas is limited A gas slug rate pressure and temperature to gas cap entering the pump suction may stabilize Be patient to allow any cause the pump to go into surge or trip on low gas cap at wellhead to escape differential pressure through flow line If no wells are producing naturally at The pumps ability to generate differential a location non producing wells shall pressure on gas is limited A gas slug gas prior to pump start up be opened to cap entering the pump suction may cause the allowed flow rate pressure and pump to go into surge or trip on low differential temperature to stabilize Be patient pressure A gas filled pump module will have to allow any gas cap at wellhead to limited possibility to draw down suction escape through flow line pressure to kick start a non flowing well In this case where the pump is only re circling through the re circle loop the gas is trapped inside the module C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System 03 01 2004 Operation Manual 19 of 110 If no wells are producing naturally at Pump pressure bara a location estimated liquid level in Topside pressure psi before choke flow line based on pump suction or Liquid density kg m
76. sure Wellhead pressure Wellhead temperature Wellhead choke position EE Pump A suction pressure Pump A discharge pressure Pump A Process temperature Pump B suction pressure Pump B discharge pressure Pump B Process temperature Separator pressure C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 36 of 110 7 NORMAL OPERATION 7 1 Normal operation of pump s During normal operation the speed and or the re circulation choke position can be changed from the HMI system Based on the well tests performed chapter 0 the PLC calculates the GVF the pump s are operating at The GVF and pump speed is then used to calculate the maximum allowable differential pressure over the pump s For most cases the maximum differential pressure is 40 bar but at high GVF or at low speed the dpmax limit can be lower than 40 bar The maximum differential pressure is displayed as dPmax on the process screen in the HMI system Based on the GVF speed and Pump dP also the theoretical flow rate at the pump inlet is calculated Please not that the calculated GVF dPmax and flow rate are based on historical well test data To use this data for guidance for pump operation requires that the well test data s are updated regularly The basis for normal operation of the pump is to keep a constant down hole pressure for each well C
77. ure drops dramatically it could indicate that the process is leaking to sea The Control fluid HPU will trip outlet solenoid activated To get the HPU back in operation the solenoid has to be forced open to increase the supply pressure above low low level Are there any limitations to the operation of the valves C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A 03 01 2004 Pump System Med 59 of 110 Operation Manual A In case many valve operations are performed in very short time the supply pressure topside may have dropped and the HPU will need to boost the pressure in the supply line A few seconds delay may be observed In worst case this can trip the HPU To get the HPU back in operation the outlet solenoid has to be forced open to increase the supply pressure above low low level C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 60 of 110 14 4 FAQ VSD and Trafo Reference is made to ABB documentation xxxxx Q VSD ready signal is missing how do I get it back A In the VSD control panel front there is a Main Contactor switch Close the main contactor by turning the switch first counter clockwise then clockwise A A hi hi temperature in the transformers will trip the main contacto
78. ystem 03 01 2004 Operation Manual 50 of 110 12 PREPARATION OF FDS TOINSTALL RETRIVE MPP MPFM AND RE CIRC CHOKE The FDS process system has 3 retrievable components Before the components are retrieved the following procedure should be carried out AA AAA jina lai ls RR Mai liii 2 1 7 Open pipe clamp on selected component Allowed process pressure to equalize with sea pressure Follow the retrieval procedure for the actual component MPP 4553 xxxx D MPFM 4553 Choke 4553 Performed the following valve operation with ROV SS Closing V1 Closing V2 Closing V5 a Closing V6 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System Zo Pump System 03 01 2004 Operation Manual 51 of 110 Open V1 Closed V2 Open V5 Open V6 Open V1 Open V2 Open V5 Closed V6 C Training 76369018 Dokument 4553 1026 D rev A Operation manual as built doc Ceiba FFD Subsea 4553 1026 D Multiphase Pump System A Pump System i 03 01 2004 Operation Manual 52 of 110 A reboot of the Cameron system will cause a pump trip and loss of operational control of valves at the tree for a period of about 20 minutes Therefore the following procedure should be followed prior to rebooting a Perform a normal stop of the pump chapter 8 Stop the well a a Fill methanol according to procedures 8 or 8 2 a

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