CN102758602A - Concentric tube hydraulic piston drainage and extraction device and method for coal-bed gas well - Google Patents
Concentric tube hydraulic piston drainage and extraction device and method for coal-bed gas well Download PDFInfo
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- CN102758602A CN102758602A CN2012102407348A CN201210240734A CN102758602A CN 102758602 A CN102758602 A CN 102758602A CN 2012102407348 A CN2012102407348 A CN 2012102407348A CN 201210240734 A CN201210240734 A CN 201210240734A CN 102758602 A CN102758602 A CN 102758602A
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Abstract
The invention discloses a concentric tube hydraulic piston drainage and extraction device and a method for a coal-bed gas well, and relates to the technology of water drainage and gas extraction for the coal-bed gas well. The defects in the other technologies are overcome; and the concentric tube hydraulic piston drainage and extraction device for the coal-bed gas well consists of an underground pumping set of the concentric tube hydraulic piston drainage and extraction device for the coal-bed gas well, a hydraulic controlled valve and a ground part of the concentric tube hydraulic piston drainage and extraction device for the coal-bed gas well, wherein a hydraulic oil pump is driven by a motor to supply oil for a hydraulic water injection pump; the hydraulic water injection pump moves up and down in a reciprocating mode; water in a water tank is quantitatively injected into the hydraulic control valve; and the motor of the hydraulic oil pump regulates the speed by a frequency converter so as to achieve the aim of regulating the output volume of the hydraulic water injection pump.
Description
Technical field: the present invention relates to coal bed gas well water pumping gas production technology, especially coal bed gas well concentric tube hydraulic piston row's device for picking and method.
Background technology: at present, the coal bed gas water drainage-gas recovery technology is main with tubing pump (oil pumper-sucker rod-tubing pump), and screw pump (ground drives-sucker rod-screw pump) is auxilliary, a small amount of latent centrifugal pump of electricity that adopts.Because mixing coal dust in the coal bed gas well extraction liquid, coal dust deposits in oil pipe and is prone to cause holddown, cause down-hole pump short application life, increased inspection pump work amount.In addition, the down-hole pump discharge capacity should not be regulated.The sucker rod of tubing pump is up and down serious with sucker rod screw pump the eccentric wear that rotatablely moves in high angle hole, causes pump detection period shorter; Do not fit into complicated well type, like S type horizontal well.Its major defect is: 1, be deposited on not easy to clean of the interior coal dust of oil pipe, be prone to block the down-hole pump group; 2, sucker rod and oil pipe friction cause rod tube to damage; 3, oil pumper stroke, jig frequency are difficult for step-less adjustment; 4, energy consumption is high, and equipment cost is high.
Summary of the invention: the purpose of this invention is to provide coal bed gas well concentric tube hydraulic piston row's device for picking and method that a kind of down-hole and ground combine and uses; It has overcome the shortcoming that other technology exists; The objective of the invention is to realize like this; It is made up of coal bed gas concentric tube hydraulic piston row device for picking down-hole pump group, pilot operated valve device, coal bed gas concentric tube hydraulic piston row device for picking above ground portion, and the bridge-type joint is loaded in the outer tube top connection, and is spacing with limited cap; Intubate is threaded with plug, and plug inserts in the bridge-type joint centre bore; Outer tube is threaded with the outer tube top connection, and stator bore and bridge-type joint be by being threaded, and is suspended in the outer tube; Travelling valve and upper plug are by being threaded, and upper plug is connected with mobile cylinder barrel, on the spring housing that commutates moving on the cylinder barrel, regulate cap and be connected with mobile cylinder barrel; Standing valve is connected with lower plunger, and lower plunger is connected with the outer tube lower contact, and spring shim, following switching-over spring housing are on lower plunger, and the outer tube lower contact is connected with external pipe thread.
Upper flange is installed in the top of cylinder barrel, and the sphere plug is arranged in the top of last cylinder barrel; First inlet, first leakage fluid dram are welded on respectively on the cylinder barrel, and second inlet, second leakage fluid dram are welded on down on the cylinder barrel respectively; The piston rod upper end is threaded with upper piston, and its lower end is threaded with lower piston, and piston rod passes intermediate seal joint endoporus; Draining connector is positioned in the middle of following cylinder barrel and the lower flange.
Connecting the hydraulic pressure water injecting pump at ground hydraulic station, the hydraulic pressure water injecting pump is connected with pilot operated valve device, water tank respectively, on water tank, is connecting bleed off pipe.
Method of work of the present invention and meaning are: hydraulic oil pump is given hydraulic pressure water injecting pump fuel feeding under the drive of motor, the hydraulic pressure water injecting pump pumps, and quantitatively injects the water in the water tank in the pilot operated valve device; The hydraulic oil pump motor is realized speed governing through frequency converter, regulates thereby reach the discharge capacity of regulating the hydraulic pressure water injecting pump; The water of discharging from the hydraulic pressure water injecting pump gets into pilot operated valve device first inlet, and it is up that current promote upper piston, sphere plug and upper piston horn mouth fitted seal, and first inlet is communicated with first leakage fluid dram, and current get in the unit intubate of down-hole; Lower piston is up simultaneously, separates with draining connector, and second leakage fluid dram is communicated with draining connector, in the unit of down-hole, returns liquid entering water tank; When the second inlet feed liquor, lower piston is descending, with draining connector horn mouth fitted seal; Second inlet is communicated with second leakage fluid dram, and current get in the unit oil pipe of down-hole, simultaneously; Upper piston is descending; Separate with the sphere plug, first leakage fluid dram is communicated with draining connector, and the water in the intubate returns into water tank; When injecting High-Pressure Water in the intubate, current get in the plug through intubate, plug and bridge-type joint fitted seal; Current get into the A chamber, and descending along the annular space of stator bore and outer tube composition, hydraulic action is on mobile cylinder barrel lower section; It is up to promote to move cylinder barrel; This moment travelling valve close, standing valve opens, the travelling valve upper liquid is moved and accomplishes the imbibition process in the cylinder barrel by lifting; When mobile cylinder barrel runs to top dead centre, switching-over spring in the compression, the well washing hole on the mobile cylinder barrel moves past the position of standing valve, and current are got into to move by well washing hole accomplishes the release well-flushing in the cylinder barrel; At this moment, pilot operated valve device switching-over in ground is injected water under high pressure in oil pipe; Current are through oil pipe, by the B passage of bridge-type joint, with hydraulic action on mobile cylinder barrel upper section; Effect at hydraulic pressure moves down moveable cylinder, travelling valve is opened; Standing valve cuts out, and the water that moves in the cylinder barrel gets in the oil pipe through travelling valve, when one-stroke down by lifting; The liquid of extracting out in the well gets in the water tank, is discharged by bleed off pipe, and this partially liq is exactly an extraction liquid.
Description of drawings: Fig. 1 is a coal bed gas concentric tube hydraulic piston row device for picking down-hole pump group sketch map, among the figure 1, intubate 2, bridge-type joint 3, limited cap 4, plug 5, outer tube top connection 6, travelling valve 7, upper plug 8, stator bore 9, outer tube 10, move cylinder barrel 11, on commutate spring 12, standing valve 13, regulate cap 14, lower plunger 15, spring shim 16, commutate spring 17, outer tube lower contact down
Fig. 2 is the pilot operated valve device structural representation, among the figure 18, upper flange 19, sphere plug 20, go up cylinder barrel 21, upper piston 22, first inlet 23, intermediate seal joint 24, second inlet 25, cylinder barrel 26, lower piston 27, draining connector 28, lower flange 29, first leakage fluid dram 30, piston rod 31, second leakage fluid dram down
Fig. 3 is a coal bed gas concentric tube hydraulic piston row device for picking down-hole pump ground flow sketch map, among the figure 32, ground hydraulic station 33, hydraulic pressure water injecting pump 34, pilot operated valve device 35, water tank 36, bleed off pipe
The specific embodiment: embodiment 1, the present invention are made up of coal bed gas concentric tube hydraulic piston row device for picking down-hole pump group, pilot operated valve device, coal bed gas concentric tube hydraulic piston row device for picking above ground portion; Bridge-type joint 2 is loaded in the outer tube top connection 5, and is spacing with limited cap 3; Intubate 1 is threaded with plug 4, and plug 4 inserts in bridge-type joint 2 centre bores; Outer tube 9 is threaded with outer tube top connection 5, and stator bore 8 and bridge-type joint 2 be by being threaded, and is suspended in the outer tube 9; Travelling valve 6 and upper plug 7 are by being threaded, and upper plug 7 is connected with mobile cylinder barrel 10, on the spring 11 that commutates be enclosed within and move on the cylinder barrel 10, regulate cap 13 and be connected with mobile cylinder barrel 10; Standing valve 12 is connected with lower plunger 14, and lower plunger 14 is connected with outer tube lower contact 17, and spring shim 15, the spring 16 that commutates is enclosed within on the lower plunger 14 down, and outer tube lower contact 17 is threaded with outer tube 9.
Embodiment 2, upper flange 18 are installed in the top of cylinder barrel 20, and sphere plug 19 is arranged in the top of last cylinder barrel 20; First inlet 22, first leakage fluid dram 29 are welded on respectively on the cylinder barrel 20, and second inlet 24, second leakage fluid dram 31 are welded on down respectively on the cylinder barrel 25; Piston rod 30 upper ends are threaded with upper piston 21, and its lower end is threaded with lower piston 26, and piston rod 30 passes intermediate seal joint 23 endoporus; Cylinder barrel 25 was middle with lower flange 28 under draining connector 27 was positioned at.
Embodiment 3, connecting hydraulic pressure water injecting pump 33 at ground hydraulic station 32, hydraulic pressure water injecting pump 33 is connected with pilot operated valve device 34, water tank 35 respectively, on water tank 35, is connecting bleed off pipe 36.
Embodiment 4, method of work of the present invention are: hydraulic oil pump is given hydraulic pressure water injecting pump fuel feeding under the drive of motor, the hydraulic pressure water injecting pump pumps, and quantitatively injects the water in the water tank in the pilot operated valve device; The hydraulic oil pump motor is realized speed governing through frequency converter, regulates thereby reach the discharge capacity of regulating the hydraulic pressure water injecting pump; The water of discharging from the hydraulic pressure water injecting pump gets into pilot operated valve device first inlet 22, and it is up that current promote upper piston 21, sphere plug 19 and upper piston 21 horn mouth fitted seal, and first inlet 22 is communicated with first leakage fluid dram 29, and current get in the down-hole unit intubate 1; Lower piston 26 is up simultaneously, separates with draining connector 27, and second leakage fluid dram 31 is communicated with draining connector 27, in the unit of down-hole, returns liquid entering water tank; When second inlet, 24 feed liquors, lower piston 26 is descending, with draining connector 27 horn mouth fitted seal; Second inlet 24 is communicated with second leakage fluid dram 31, and current get in the unit oil pipe of down-hole, simultaneously; Upper piston 21 is descending; Separate with sphere plug 19, first leakage fluid dram 29 is communicated with draining connector 27, and the water in the intubate 1 returns into water tank 35; When injecting High-Pressure Water in the intubate 1, current get in the plug 4 through intubate 1, plug 4 and bridge-type joint 2 fitted seal; Current get into the A chamber, and descending along the annular space that stator bore 8 and outer tube 9 are formed, hydraulic action is on mobile cylinder barrel 10 lower sections; It is up to promote to move cylinder barrel 10; This moment travelling valve 6 close, standing valve 12 opens, travelling valve 6 upper liquids are moved and accomplish the imbibition processes in the cylinder barrel 10 by lifting; When mobile cylinder barrel 10 runs to top dead centre, switching-over spring 11 in the compression, the well washing hole on the mobile cylinder barrel 10 moves past the position of standing valve 12, and current are got into to move by well washing hole accomplishes the release well-flushings in the cylinder barrel 10; At this moment, pilot operated valve device switching-over in ground is injected water under high pressure in oil pipe; Current are through oil pipe, by the B passage of bridge-type joint 2, with hydraulic action on mobile cylinder barrel 10 upper sections; Effect at hydraulic pressure moves down moveable cylinder 10, travelling valve 6 is opened; Standing valve 12 cuts out, and the water that move in the cylinder barrel 10 get in the oil pipes through travelling valves 6, when one-stroke down by lifting; The liquid of extracting out in the well gets in the water tank 35, is discharged by bleed off pipe 36, and this partially liq is exactly an extraction liquid.
Claims (4)
1. coal bed gas well concentric tube hydraulic piston is arranged device for picking; It is made up of coal bed gas concentric tube hydraulic piston row device for picking down-hole pump group, pilot operated valve device, coal bed gas concentric tube hydraulic piston row device for picking above ground portion; It is characterized in that: bridge-type joint (2) is loaded in the outer tube top connection (5), and is spacing with limited cap (3); Intubate (1) is threaded with plug (4), and plug (4) inserts in bridge-type joint (2) centre bore; Outer tube (9) is threaded with outer tube top connection (5), and stator bore (8) and bridge-type joint (2) be by being threaded, and is suspended in the outer tube (9); Travelling valve (6) and upper plug (7) are by being threaded, and upper plug (7) is connected with mobile cylinder barrel (10), on the spring (11) that commutates be enclosed within on the mobile cylinder barrel (10), regulate cap (13) and be connected with mobile cylinder barrel (10); Standing valve (12) is connected with lower plunger (14), and lower plunger (14) is connected with outer tube lower contact (17), and spring shim (15), the spring (16) that commutates is enclosed within on the lower plunger (14) down, and outer tube lower contact (17) is threaded with outer tube (9).
2. coal bed gas well concentric tube hydraulic piston row device for picking according to claim 1, it is characterized in that: upper flange (18) is installed in the top of cylinder barrel (20), and sphere plug (19) is arranged in the top of last cylinder barrel (20); First inlet (22), first leakage fluid dram (29) are welded on respectively on the cylinder barrel (20), and second inlet (24), second leakage fluid dram (31) are welded on down respectively on the cylinder barrel (25); Piston rod (30) upper end is threaded with upper piston (21), and its lower end is threaded with lower piston (26), and piston rod (30) passes intermediate seal joint (23) endoporus; Cylinder barrel (25) was middle with lower flange (28) under draining connector (27) was positioned at.
3. coal bed gas well concentric tube hydraulic piston row device for picking according to claim 1; It is characterized in that: connecting hydraulic pressure water injecting pump (33) at ground hydraulic station (32); Hydraulic pressure water injecting pump (33) is connected with pilot operated valve device (34), water tank (35) respectively, on water tank (35), is connecting bleed off pipe (36).
4. the said coal bed gas well concentric tube of claim 1 hydraulic piston is arranged the method for work of device for picking, it is characterized in that: hydraulic oil pump is given hydraulic pressure water injecting pump fuel feeding under the drive of motor, the hydraulic pressure water injecting pump pumps, and quantitatively injects the water in the water tank in the pilot operated valve device; The hydraulic oil pump motor is realized speed governing through frequency converter, regulates thereby reach the discharge capacity of regulating the hydraulic pressure water injecting pump; The water of discharging from the hydraulic pressure water injecting pump gets into pilot operated valve device first inlet (22); It is up that current promote upper piston (21); Sphere plug (19) and upper piston (21) horn mouth fitted seal; First inlet (22) is communicated with first leakage fluid dram (29), and current get in the down-hole unit intubate (1); Lower piston (26) is up simultaneously, separates with draining connector (27), and second leakage fluid dram (31) is communicated with draining connector (27), in the unit of down-hole, returns liquid entering water tank; When second inlet (24) feed liquor, lower piston (26) is descending, with draining connector (27) horn mouth fitted seal; Second inlet (24) is communicated with second leakage fluid dram (31), and current get in the unit oil pipe of down-hole, simultaneously; Upper piston (21) is descending; Separate with sphere plug (19), first leakage fluid dram (29) is communicated with draining connector (27), and the water in the intubate (1) returns into water tank (35); When injecting High-Pressure Water in the intubate (1), current get in the plug (4) through intubate (1), plug (4) and bridge-type joint (2) fitted seal; Current get into the A chamber, and descending along the annular space that stator bore (8) and outer tube (9) are formed, hydraulic action is on mobile cylinder barrel (10) lower section; It is up to promote to move cylinder barrel (10); Travelling valve this moment (6) cuts out, standing valve (12) is opened, and travelling valve (6) upper liquid is moved and accomplishes the imbibition process in the cylinder barrel (10) by lifting; When mobile cylinder barrel (10) when running to top dead centre, switching-over spring (11) in the compression moves the position that well washing hole on the cylinder barrel (10) moves past standing valve (12), and current are got into to move by well washing hole accomplishes the release well-flushing in the cylinder barrel (10); At this moment, pilot operated valve device switching-over in ground is injected water under high pressure in oil pipe; Current are through oil pipe, by the B passage of bridge-type joint (2), with hydraulic action on mobile cylinder barrel (10) upper section; Effect at hydraulic pressure moves down moveable cylinder (10), travelling valve (6) is opened; Standing valve (12) cuts out, and the water that moves in the cylinder barrel (10) gets in the oil pipe through travelling valve (6), when one-stroke down by lifting; The liquid of extracting out in the well gets in the water tank (35), is discharged by bleed off pipe (36), and this partially liq is exactly an extraction liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240734.8A CN102758602B (en) | 2012-07-12 | 2012-07-12 | Concentric tube hydraulic piston drainage and extraction device and method for coal-bed gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240734.8A CN102758602B (en) | 2012-07-12 | 2012-07-12 | Concentric tube hydraulic piston drainage and extraction device and method for coal-bed gas well |
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| CN102758602A true CN102758602A (en) | 2012-10-31 |
| CN102758602B CN102758602B (en) | 2014-11-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014198103A1 (en) * | 2013-06-09 | 2014-12-18 | 华中科技大学 | Salvaging-type water drainage and gas retrieval machine |
| CN105443082A (en) * | 2016-01-11 | 2016-03-30 | 韩祥林 | Linear motor drive and hydraulic driven oil pumping unit for oil extraction |
| CN107227940A (en) * | 2016-03-25 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of bidirectional pulse generator for underground |
| CN108590631A (en) * | 2018-04-27 | 2018-09-28 | 廊坊市华海石油技术开发有限公司 | System is tested in a kind of underground pump assembly and underground drain |
| CN109209309A (en) * | 2018-10-29 | 2019-01-15 | 中国石油集团渤海钻探工程有限公司 | A kind of closed loop waterpower drain test technology system |
| CN110905453A (en) * | 2019-12-16 | 2020-03-24 | 四川航天烽火伺服控制技术有限公司 | Drainage and gas production device for coal bed gas well |
| CN112031712A (en) * | 2020-09-08 | 2020-12-04 | 长江大学 | Underground gas drive drainage and production pump and gas drive drainage and production method |
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| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| CN102536142A (en) * | 2012-02-07 | 2012-07-04 | 中国石油天然气股份有限公司 | Method for pumping and washing coal bed gas drainage well without stopping |
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Patent Citations (4)
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| RU2239052C1 (en) * | 2003-02-25 | 2004-10-27 | Грабовецкий Владимир Леонидович | Well sucker-rod pump for extracting liquid and gas |
| CN201425018Y (en) * | 2009-06-14 | 2010-03-17 | 殷家富 | Pipe column drainage pump for oil well |
| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014198103A1 (en) * | 2013-06-09 | 2014-12-18 | 华中科技大学 | Salvaging-type water drainage and gas retrieval machine |
| CN105443082A (en) * | 2016-01-11 | 2016-03-30 | 韩祥林 | Linear motor drive and hydraulic driven oil pumping unit for oil extraction |
| CN107227940A (en) * | 2016-03-25 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of bidirectional pulse generator for underground |
| CN107227940B (en) * | 2016-03-25 | 2019-08-30 | 中国石油化工股份有限公司 | A kind of bidirectional pulse generator for underground |
| CN108590631A (en) * | 2018-04-27 | 2018-09-28 | 廊坊市华海石油技术开发有限公司 | System is tested in a kind of underground pump assembly and underground drain |
| CN108590631B (en) * | 2018-04-27 | 2023-12-22 | 廊坊市华海石油技术开发有限公司 | Underground pump unit and underground liquid discharge testing system |
| CN109209309A (en) * | 2018-10-29 | 2019-01-15 | 中国石油集团渤海钻探工程有限公司 | A kind of closed loop waterpower drain test technology system |
| CN109209309B (en) * | 2018-10-29 | 2021-03-02 | 中国石油集团渤海钻探工程有限公司 | Closed-cycle hydraulic drainage test process system |
| CN110905453A (en) * | 2019-12-16 | 2020-03-24 | 四川航天烽火伺服控制技术有限公司 | Drainage and gas production device for coal bed gas well |
| CN112031712A (en) * | 2020-09-08 | 2020-12-04 | 长江大学 | Underground gas drive drainage and production pump and gas drive drainage and production method |
| CN112031712B (en) * | 2020-09-08 | 2023-01-17 | 长江大学 | Underground gas drive drainage and production pump and gas drive drainage and production method |
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| CN102758602B (en) | 2014-11-26 |
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