OPERATING MANUAL FOR ECOQUIP SERIES 9000
Contents
1. Place the removed half of mounting plate on the wellhead and align holes accordingly Place one short stud in the middle hole to keep plate in place Next move the lifted slave cylinders into appropriate position above wellhead Bolt slave cylinder assembly to wellhead and ensure that half mounting plate is reattached to slave cylinders using the two bolts provided see Appendix C 6 A person must be lifted to the top of the slave cylinders using a man basket or man sling to remove the pony rod from the polished rod This is done to enable the placement of a rod retainer bushing over the rod and securing it in the traveling yoke A rod rotator can be installed at this time if required Apply rod clamp s above the traveling yoke or rod rotator if present and then replace the pony rod Ensure the valve V8 at the top of slave cylinders is OPEN 7 Attach all hoses to the power unit The two large hoses located at the bottom of the slave cylinders attach to the ports leading to chamber A of the power unit The small hose coming from the top of the slave cylinders attaches to valve V7 located on the hydraulic oil tank of the power unit 8 Re tighten the bolts as described in Step 1 to hold the hoses in to place 9 After the system has been charged with oil the rod clamp above the stuffing box must be removed NOTE Two rod clamps are required for loads exceeding 22 000Ibs 11 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC2. what typically occurs is that oil from Chamber A will leak past the bottom seal set on the master piston and the operator will start to notice a gradual loss of bottom turnaround on the slave cylinders However not all loss of bottom turnaround are due to leaking seal sets If valve 1 2 or 6 are left open oil can return from the slave cylinders and Chamber A into the hydraulic oil tank causing the unit to loose bottom turn around in which case Chamber A has to be re filled with the proper amount 9 Revised 1 15 14 ECcoQUIP 9000 6 AND 9000 6x SERIES HYDRAULIC PUMP JACKS of oil to correct the loss of bottom turnaround The other possible failure is nitrogen leaking from Chamber D past the top seal set on the master piston and the operator will start to notice the prime mover working harder and reduced strokes per minute 4 Notes for Completion Crew o The area where the power unit is to be located should be about 20 from the well head 6 above the adjacent grade and the surface should be level and preferably graveled Setting the unit on 2 2 x 8 x 6 long planks will keep the frame out of the base material Install a minimum 6 long pipe nipple between the tubing hanger flange and the ratigan BOP We find on some wellheads that our slave cylinder mounting flange interferes with the hammer locks stems on the ratigan Raising the BOP eliminates this interference The ratigan stem and the production tee should be located par
3. 150 POLISHED ROD CONTROL PANEL SLAVE CYLINDER F PRODUCTION LINE er WELL HEAD SLAVE CYLINDERS POWER UNIT s Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Appendix B Wellhead Configuration STUFFING BOX MINIMUM OF 10 STICK UP AT BOTTOM OF THE STROKE FLOW TEE AND RADIGAN TO BE IN SAME PLANE MINIMUM 6 y CLEARANCE TUBING HEAD N CHECK VALVE CASING HEAD 24 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Appendix C Wellhead Mounting Procedure go e o p F ol PRO of 2 8 30 0 0 Ra 8 4 9 0 o Coo O 600 i Hen Ej STEP2 STEP3 STEP 4 HALF MOUNTING PLATE REMOVE STUDS 2 4 6 8 10 amp 12 ON SIDE WITH FLOW LINE MOVE SLAVE CYLINDER ASSEMBLY INTO PLACE INSTALL STUD B INTO 2 6 8 amp 12 INSERT STUD A INTO 10 AND TIGHTEN LIGHTLY ENSURE STUDS GO THROUGH INSERT STUD A INTO 4 AND INSERT BOLT C INTO IA amp IB AND TIGHTEN SLAVE CYLINDER FEET MOUNTING TIGHTEN LIGHTLY DOWN ENSURING BOLTS TIGHTEN HALF PLATE PLATE AND WELL HEAD FLANGE TO SLAVE CYLINDER FEET TIGHTEN ALL NUTS ON ALL STUDS lt 7 CYLINDER BARREL BOLT C FLAT WASHER ECOQUIP MOUNTING PLATE STUDB BASE PLATE OF CYLINDER TUBING BONNET FLANGE CASING BOWL FLANGE NUT NUT SECTION THROUGH MOUNTING WELLHEAD INS
4. ACKS BOTTOM settings i e Stroke Bottom Setting 8 and Stroke Top Setting 23 would give 15 of master piston travel thus giving you a 92 stroke with 3 slave cylinders and 109 stroke with 2 75 slave cylinders as defined by the Stroke Length and Master Piston Travel chart Desired stroke length can be obtained using chart on the following page NOTE Ensure that only the minimum amount of oil is used to extend the slave cylinders Over extension occurs at 142 when using 3 slave cylinders therefore when there is 23 of travel by the master piston 15 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Stroke Length and Master Piston Travel Chart Master Piston Displacement 10 5 Master 3 Slave Cylinder 692 99 866 23 1039 48 1212 73 1385 97 1559 22 1732 47 1905 72 2078 96 1 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Setting Stroke Length Procedure 1 On the main screen press button 4 This brings you to the Stroke Screen RUNNING STROKE SETTINGS DESIRED STROKE 0001 ACTUAL STROKE 0 00 In BOTTOM TURN AROUND 0 00 In TOP TURN AROUND 0 00 In SELECT ADJUST VALUE TOGGLE Left and Right Arrow Button will select the setting to adjust Up and Down Arrow Button will adjust the selected setting Button 8 will switch between adjusting the inches and hundredths of an inch OK Button will save the setti
5. OPERATING MANUAL FOR ECOQUIP SERIES 9000 6 AND 9000 6x HYDRAULIC PUMP JACKS Patent US 5 996 688 Patent 2 255 603 IU amp Sales Ltd 6235A 86th Avenue S E Calgary Alberta P 403 255 5207 F 403 255 9150 www ecoquip ca ECOQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Table of Contents 1 Pump Jack Features 2 Pump Jack Specifications 3 Operating Manual 4 Notes for Completion Crew 5 Installation of Slave Cylinders 6 System Oil Fill and Startup 7 Balancing the Unit 8 Setting the Stroke Length and Turnaround Positions 9 Starting the Unit 10 Bleeding the Unit 11 Shutdown and Draining of System 12 Removal of Slave Cylinders Appendix Pump Jack Diagram and Flow Sheet Appendix B Wellhead Configuration Appendix C Wellhead Mounting Procedure 6235A 86 Avenue 5 Calgary Alberta 2 254 Phone 403 255 5207 Fax 403 255 9150 Email info ecoquip ca ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 1 Pump Jack Features The ECOQUIP Series 9000 6 and 9000 6x Pump Jacks are a Canadian development in hydraulic pump jacks for the operation of sucker rod pumps Distinctive features of this pump jack include o Due to the versatility and portability of the 9000 series pump jacks they are suited for well testing and permanent pumping solutions A single Ecoquip unit covers a wide range of conventional pump jacks o The unit is
6. PUMP JACKS 6 System Oil Fill After the slave cylinders are installed and all hose connections have been tightened the unit is charged with oil 1 Go to the main screen Press button 2 This brings up the JOG Screen 2 Open valves V6 and V1 This allows oil from the pump to be discharged into chamber A The pressure approx 300 psi may be sufficient to raise the slave cylinders o Ifthe slave cylinders rise close V1 and extend slave cylinder down by pressing and holding 8 Retract This will lower the Actual Position number on the screen Note that you should bring down the green traveling yoke to 4 6 above the fixed yoke connector plate If desired bottom turnaround is not reached re open V1 and allow oil to enter system and raise slave cylinders again then close V1 and repeat holding down 8 Retract until desired bottom turnaround is reached o Ifthe slave cylinders do not rise from initial pressure press and hold 8 Retract V1 is open until the desired stroke bottom setting is displayed in Actual Position on the screen Ensure that you leave 4 6 of space between the traveling yoke and the fixed yoke connector plate 3 Now close valve V1 Press 7 Extend key to raise slave cylinders a few inches refer to travel chart on page 19 then remove the rod clamp above the stuffing box 4 The unit is now ready to have the bottom and top turnaround settings for the master piston set which in turn produce the
7. TALLATION 2000LB Well head Stud 1 x 11 Stud B 1 x 15 3000Ib Well head Stud 1 1 8 x 11 Stud B 1 1 8 x 15 5000Ib Well head Stud 1 3 8 x 15 Stud B 1 3 8 x 18 Bolt ia and ib 1 14 x 5 7 Gr 8 bolts 25 Revised 1 15 14
8. above the travelling yoke 2 Remove the rod bushing from the traveling yoke and take off the rod The pony rod may have to be removed to do this 3 Attach a sling to the horns provided on the sides of the stationary yoke 4 Loosen the bolts at the hose connections at the bottom of the slave cylinders until the hoses can be rotated by hand but not so loose that oils seeps out Also disconnect these hoses from chamber A of the power unit 5 Disconnect the hose connected to V7 At this point it is important to put caps and plugs on hydraulic pump port V7 and all hoses respectively 6 Remove all 8 studs that bolted slave cylinder assembly to wellhead In addition remove the two studs from half the mounting plate facing the open end of the top of the slave cylinders Check Appendix A for stud locations The slave cylinder assembly is ready to be lifted from the wellhead 7 Power unit and slave cylinders are now ready to be loaded and transported NOTE Ensure the hoses connections and all caps and plugs are secured in place on all hoses to prevent leakage while in transport Also ensure that the split mounting plate rod bushing and extended studs are all transported along with the unit 22 Revised 1 15 14 EcoQur 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Appendix A Pump Jack Diagram and Flow UM Lad 6235A bith Ave SE ROD CLAMP Calgary ABT Grete 744012555207 403 255 9
9. allel with one another i e in line with one another The polished rod should extend minimum of 10 feet above the tubing hanger flange with the pump at the bottom of its travel Do not tighten the pony rod on the polished rod as it must be removed to install a rod retainer bushing and extension polish rod during installation The power unit weighs about 6 500 lbs The picker should be capable of lifting this weight at 15 feet and setting the power unit on the graveled pad The picker is also needed to set the slave cylinders in place The weight requirement is approximately 2 000 165 and needs to reach a height of about 30 feet A rod clamp is required for placement above the traveling yoke in addition to the rod clamp left in place above the stuffing box o See Appendix B for Wellhead Configuration Diagram 10 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 5 Installation of Slave Cylinders 1 Slightly loosen the bolts located on the hoses at the bottom of the slave cylinders This allows the hoses to rotate and makes mounting easier 2 Secure slings in lifting horns located at top of slave cylinders ensuring no pressure is put on hoses fitting or valves 3 If not already done remove half of the mounting plate This should be the half that is facing the open sides of the traveling yoke and the slave cylinder top plate 4 Remove studs from wellhead as described in Appendix C 5
10. h master piston at bottom approx 24 7 reading at Actual Position on JOG Screen and the slave cylinders at their bottom position NOTE Before beginning this procedure ensure the valve V8 located at the top of the slave cylinders is open 20 Revised 1 15 14 EcoQur 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 1 Shutdown and Draining of System 1 Stop the unit with the polished rod near the bottom of its stroke 12 above the fixed yoke 2 Apply a rod clamp above the stuffing box 3 Turn the motor off 4 Open valves V6 and V2 this drains oil from chamber A into the reservoir Watch the oil level in the reservoir to ensure it does not overflow 5 As oil is drained from the system the slave cylinders will lower until the rod clamp takes the rod load 6 The master piston will be pushed to its bottom position by nitrogen pressure in chamber D 7 The master piston has reached its bottom travel when this screen reads approximately 24 7 and oil flow stops Slave Cylinders should be at bottom position now Now close valves V6 and V2 NOTE At this point there is no pressure on the slave cylinders and as the master piston has bottomed out there is no danger from potential movement of the slave cylinders It is safe to start work on and around the slave cylinders 21 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 12 Removal of Slave Cylinders 1 Remove the top rod clamp
11. ing the sucker rod upstroke The piston moves vertically within the cylinder in the opposite direction to the polished rod Chamber A is connected to the slave cylinders by means of a pair of hoses The operating principle of chamber A and the slave cylinders is comparable to the hydraulic brake system on an automobile Oil is moved from the master brake cylinder to the wheel cylinders to apply the brakes when the brake pedal is depressed As the brake pedal pressure is removed oil flows from the wheel cylinders back to the master brake cylinder The Series 9000 6 hydrostatic pump uses this same principle Oil is displaced from chamber A to the slave cylinders causing them to rise when the piston in the master cylinder moves downward The piston will rise when the polished rod moves down because oil is moved from the slave cylinders back to chamber A of the master cylinder Chamber D of the master cylinder is the accumulator It is a closed chamber that is filled with pressurized nitrogen It acts to store energy during the down stroke of the polished rod for use in moving the polished rod upward Chambers B and C are where energy is added to the system Chamber B is pressurized with oil from the hydraulic pump during the polish rod up stroke The hydraulic pump pressurizes chamber C during the polished rod down stroke Chambers B and C are in a closed loop with the pump The pump draws oil from Chamber C and discharges into Chamber B when the ma
12. l the desired strokes per minute is achieved See next page for Velocity Screen Picture 18 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS VELOCITY SCREEN RUNNING VELOCITY SETTINGS ACTUAL VELOCITY 0 00 INISEC SPEED UP 0 0 1 10 SPEED DOWN 0 0 1 10 i BO SELECT ADJUST VALUE PRESS TO SAVE Left and Right Arrow Button will select the setting to adjust Up and Down Arrow Button will adjust the selected setting OK Button will save the setting value ESC Button will return to the Main Screen 19 Revised 1 15 14 EcoQur 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 10 Bleeding the System The system may have to be purged of air at some time It is possible that air can enter the system therefore affecting the operations of the pump jack V Valve 1 Ensure that motor and pump are running 2 Ensure V7 is closed and disconnect from oil tank Place end in filler cap opening on top of tank for observation 3 Ensure V8 is open at the top of the slave cylinders 4 Now open V1 V6 and V7 This will allow a full circulation of the system This should continue until there is a steady stream of oil being observed from V7 with NO air remaining in the oil 5 When this occurs close V8 at top of slave cylinders and reconnect V7 to the oil reservoir 6 The system is ready to be filled Follow the instructions in section 6 1 System Oil Fill NOTE This is best done wit
13. lightweight and easily transported It is moved to the field as a complete unit and is completely set up and pumping the well in less than 3 hours o The unit does not require any site preparations or foundations The slave cylinder assembly mounts directly on the wellhead and does not require additional braces or supports The power unit can be set on grade preferably on a gravel base or on a pair of short planks Ecoquip s pump jacks have minimal environmental visual and noise impact o The 9000 6 series can lift up to 35 000 pounds polished rod load has fully independent stroke controls capable of less than 1 and up to 8 strokes per minute stroke lengths up to 158 9000 6x pumping speed can be adjusted to match well inflow rates the unit can be set on a timer for pumping in time intervals up and down stroke speeds can be set independently including a bottom turnaround pause to achieve the best pump efficiency o The motor is started without load Therefore the unit does not require high torque slow speed motors clutches or gearboxes Motors are normally operated at 1750 to 2000 RPM The unit can be powered by electric motor or piston engine fueled by gasoline diesel LPG clean wellhead gas or natural gas o The Ecoquip pump jack is balanced with nitrogen which stores energy substantially increasing efficiency as less power is required to operate the unit as well as reducing the wear on pumps rods and equipme
14. locities can be set independently Skid Size and Weight The power unit is mounted on a 4 6 wide x 10 long skid that is equipped with horns for lifting Estimated shipping weight of the power unit is 6 500 pounds and 2 000 pounds for the slave cylinders Balancing The unit is balanced with a nitrogen ballast This ballast pressure is sufficient to hold the static rod weight During the down stroke of the polished rod energy from rod downfall is recovered 4 Revised 1 15 14 EcoQurP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS and combined with energy from the hydraulic pump This energy is fully recovered during the polished rod up stroke Nitrogen bottles are used to charge the gas accumulator The unit can be finely balanced to equalize loads on the motor in both the up and down strokes Slave Cylinders The slave cylinder assembly is mounted to the wellhead by means of an adaptor plate It permits mounting of the slave cylinders on the wellhead directly above the tubing bonnet flange Every other stud is removed for flush even mounting which guarantees the rod is always pulled direct centre Hose Length Standard 20 long hydraulic hoses connect the power unit to the slave cylinders All electrical and power equipment is approximately 20 from the well Lubricants The hydraulic fluid is synthetic and has been selected to provide lubrication and suitable viscosity for operation from 45 to 82 The unit is deli
15. ng value ESC Button will return to the Main Screen NOTE If stroke speed is to be set to HIGH range you must allow for possible over travel for both your turnaround settings i e stroke bottom is 3 and stroke top is 23 the settings should be adjusted to 3 5 and 22 5 respectively 17 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 9 Starting the Unit Go to Main screen and press 2 JOG Using 7 Extend and 8 Retract cycle the unit through one up down cycle stopping the upward travel of the slave cylinders at your set turnaround At the low point the slave cylinders should be about 4 6 above the fixed yoke connector plate at the top of the slave cylinders 1 If the slave cylinders are bottoming out stop the unit and add a slight amount of oil to the system If the slave cylinders are turning around more than 4 6 above the top of the fixed yoke connector plate drain some oil from the system by opening valves V6 and only on the down stroke V2 intermittently you can hear the oil come into the tank 2 Repeat until the correct amount of oil is in the system This is achieved when the bottom turnaround is taking place with the traveling yoke not more than 4 6 above the fixed yoke connector plate 3 Start increasing the pumping speed by moving the SPEED UP and SPEED DOWN to the next position Monitor the slave cylinder s action and turnaround positions Increase the speed unti
16. nt as it eliminates shock loading The operator accurately balances the unit by changing the pressure in the nitrogen gas accumulator 3 Revised 1 15 14 EcoQur 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS o There are no open limit or proximity switches on the unit The controls for the motion of the sucker rod including the stroke length accelerations and decelerations and stroke speed are conveniently and safely located on the power unit The unit has no exposed moving parts to create a safety hazard o The Ecoquip pump jack series is field proven since 2000 operates in diverse environments from 40 to 50 and has run continuously for 5 years with just routine field maintenance 2 Pump Jack Specifications This specification describes the primary features and capacities of an ECOQUIP Series 9000 6 Pump Jack The unit consists of a skid mounted power unit and a slave cylinder assembly that are combined into a single shipping unit The slave cylinder assembly bolts to the wellhead and strokes the polished rod The power unit is placed about 20 from the well and powers and controls the movement of the slave cylinders All controls are mounted on the power unit Capacities Maximum polished rod load 35 000 Ibs Stroke length variable to Maximum 144 on the 9000 6 unit and 158 on the 9000 6x unit Pump Speed The operator can adjust the pump speed over a range of less than 1 to 8 strokes per minute Up and down stroke ve
17. polished rod A fixed yoke connector plate ensures the rod is pulled straight and held in place A rod clamp is applied above the traveling yoke Controls There are three primary hardware items in the control system These are the probe which is mounted on top of the N2 accumulator the controller and the display unit The probe accurately senses the position of the master piston and sends this position by means of an electrical signal to the controller The controller determines what the pump must do the flow rate and where the oil is to be sent chamber B or C to meet the conditions set by the operator With this information the operator presets the master piston position signal from the probe via the display unit The controller develops and sends an electrical signal to the pump for control purposes 8 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Display unit 1 35 PM BALANCING GRAPH STROKES MIN 0 0 ACTUAL POSITION 13 81 In STROKE LENGTH 0 00 In STROKE COUNT 0 TIMED CONTROL DISABLED CHARGE 291 51 C 225 5 B 1035PSI RUN TIME HOURS 0 POLISH ROD LOAD 97991 5 HYD TANK TEMP 158 F WARNING HYD TANK LEVEL Due to the engineered design of the Ecoqiup 9000 6 series a catastrophic failure is highly unlikely The two closed loop systems will operate properly while the internal seal groups on the master piston are keeping all the chambers independent On a failure
18. ster piston is moving down The direction of oil flow is reversed when the set limit of travel is reached Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS ii Hydraulic Pump A positive displacement swash plate type pump provides the energy required for pumping The volume of fluid passing and direction of flow through the pump is controlled by changing the angle of the swash plate The angle of the swash plate is set by a signal received from the motion controller in the control panel The pump is directly connected to the prime mover an electrical motor or gas engine iii Controller The controller is the brains of the system It tells the pump which direction to pass oil and at what flow rate The controller receives a continuous location signal from a probe that senses the position of the master piston within the master cylinder When the probe senses that the master piston is at a preset travel position such as the top of the stroke the control panel delivers a signal to the pump to change flow direction Stroke length polished rod velocity top turnaround and bottom turnaround acceleration are all considered by the controller in delivering a signal to the hydraulic pump Slave Cylinders The slave cylinders mount on the wellhead and provide the power to stroke the polished rod The assembly consists of twin cylinders mounted on either side of the polished rod a traveling cross yoke green to pick up the
19. stroke length see picture of Jog Screen on next page 12 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS JOG SCREEN JOG CONTROL SETAS TOP 19 50 SET AS BOTTOM 5 00 Button 3 will set the current position as the Top Turn Around Button 4 will set the current position as the Bottom Turn Around Button 5 will reset the Top and Bottom Turn Around to their default values Button 7 will extend the cylinders Button 8 will retract the cylinders ESC Button will return to the Main Screen 13 Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 7 Balancing the Unit The unit is balanced by changing the pressure in the accumulator chamber D Nitrogen is added or released through a 6 JIC port located below the nitrogen pressure gauge Increasing the ballast pressure by adding nitrogen until the slave cylinders begin to rise puts the unit in static balance At this point the nitrogen pressure is sufficient to support the weight of the polished rod load The pressure in the nitrogen chamber may require adjustment to reach dynamic balance If the unit is working harder in the sucker rod up stroke the nitrogen pressure should be increased Inversely if it is working harder during the down stroke the nitrogen pressure should be reduced To ensure that the system is in balance you can verify using one of the following methods o Take the maximum and minimum pressure meas
20. urements psi from gauge A to read Gauge A open V6 at the bottom of the master piston Add these together and divide by two this number will be the same as the reading on the nitrogen pressure gauge if the unit is in balance Please remember to close V6 again If maximum measurements psi are the same on gauges and while unit is stroking then the unit is in balance NOTE Ambient temperature changes will result in a change in accumulator pressure Therefore balancing should be done to suit the mean daily temperature rather than the high or low daily temperature 8 Setting the Stroke Length and Turnaround Positions The Series 9000 6 slave cylinders when provided with 3 diameter cylinders will move a theoretical 6 15 for each 1 change in master piston position Therefore to perform a 120 stroke the turnaround points should be set a theoretical 19 5 apart Momentum and oil compressibility increase the stroke length as the pumping speed increases therefore the desired stroke length should be set for the maximum expected pumping speed to prevent over stroking the slave cylinders At slower pumping speeds a slight reduction in stroke length will be realized Now the unit is ready to have the stroke length set Stroke length is set by setting the traveling distance of the master piston which is the difference between the STROKE TOP and STROKE 14 Revised 1 15 14 ECcoQUIP 9000 6 AND 9000 6x SERIES HYDRAULIC PUMP J
21. vered fully charged with hydraulic fluids Motor Motors are sized to suit the application Motors may be electric LPG wellhead gas or diesel fueled Standard Type B TEFC 1750 RPM electric motors are suitable as motors are not started under load Engine operating RPM can be from 1750 to 2000 RPM and a clutch is not required Revised 1 15 14 ECoOQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS 3 Operating Manual Principles of Operation A simplified flow sheet of the Series 9000 6 unit is shown below enlarged as Appendix A There are two primary components to this unit a slave cylinder assembly which mounts on the wellhead above the tubing flange and a skid mounted power unit which is placed about 20 feet from the well There are two closed loop hydraulic systems one between Chamber A and the slave cylinders and a second one between the swash plate hydraulic pump and Chambers B SLAVE CYLINDERS POWER UNIT Revised 1 15 14 ECoQUIP 9000 6 AND 9000 6 SERIES HYDRAULIC PUMP JACKS Power Unit The power unit consists of the master cylinder a hydraulic pump motor and a control panel i Master Cylinder The master cylinder has four chambers and D which are created by a free floating piston inside the master cylinder At the top of the master cylinder open end is an accumulator which is used to store energy during the sucker rod downward movement and which releases energy dur
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