CN102758602B - 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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- CN102758602B CN102758602B CN201210240734.8A CN201210240734A CN102758602B CN 102758602 B CN102758602 B CN 102758602B CN 201210240734 A CN201210240734 A CN 201210240734A CN 102758602 B CN102758602 B CN 102758602B
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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 drainage gas recovery, especially coal bed gas well concentric tube hydraulic piston mining device and method.
Background technology: at present, coal bed gas water drainage-gas recovery technology be take tubing pump (oil pumper-sucker rod-tubing pump) as main, and screw pump (ground drives-sucker rod-screw pump) is auxiliary, a small amount of latent centrifugal pump of electricity that adopts.Owing to mixing coal dust in coal bed gas well Produced Liquid, coal dust deposits and easily causes holddown in oil pipe, causes down-hole pump short application life, has increased inspection pump work amount.In addition, down-hole pump discharge capacity should not regulate.Sucker rod sucker rod rotary motion eccentric wear in high angle hole up and down and screw pump of tubing pump is serious, causes pump detection period shorter; Be not suitable for Holes of Complicated Wells type, as S type horizontal well.Its major defect is: 1, be deposited on not easy to clean of coal dust in oil pipe, easily block 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 object of this invention is to provide the coal bed gas well concentric tube hydraulic piston mining device and method that a kind of down-hole and ground combine and uses, it has overcome the shortcoming that other technology exists, the object of the present invention is achieved like this, it is comprised of coal bed gas concentric tube hydraulic piston mining device down-hole pump group, pilot operated valve device, coal bed gas concentric tube hydraulic piston mining device above ground portion, bridge-type joint is loaded in outer tube top connection, spacing with limited cap; Intubate is threaded with plug, and plug inserts in bridge-type joint centre bore; Outer tube is threaded with outer tube top connection, and stator bore, and hangs within the outer tube by being threaded with bridge-type joint; Travelling valve is with upper plug by being threaded, and upper plug is connected with mobile cylinder barrel, and upper commutation spring housing is on mobile cylinder barrel, and adjustment cap is connected with mobile cylinder barrel; Standing valve is connected with lower plunger, and lower plunger is connected with outer tube lower contact, and spring shim, lower commutation spring housing are on lower plunger, and outer tube lower contact is connected with external pipe thread.
Upper flange is arranged on the top of cylinder barrel, has sphere plug in the top of upper cylinder barrel; The first inlet, the first leakage fluid dram are welded on respectively on cylinder barrel, and the second inlet, the second leakage fluid dram are welded on respectively on lower cylinder barrel; Piston rod upper end is threaded with upper piston, and its lower end is threaded with lower piston, and piston rod is through intermediate seal joint endoporus; Draining connector is positioned in the middle of lower cylinder barrel and lower flange.
At ground hydraulic station, connecting hydraulic injection pump, hydraulic injection pump is connected with pilot operated valve device, water tank respectively, is connecting bleed off pipe on water tank.
Method of work of the present invention and meaning are: hydraulic oil pump is given hydraulic injection pump fuel feeding under the drive of motor, and hydraulic injection pump pumps, and the water in water tank is quantitatively injected in pilot operated valve device; Hydraulic oil pump motor is realized speed governing by frequency converter, thereby reach, regulates the discharge capacity of hydraulic injection pump to regulate; The water of discharging from hydraulic injection pump enters pilot operated valve device the first inlet, and it is up that current promote upper piston, sphere plug and upper piston horn mouth fitted seal, and the first inlet is communicated with the first leakage fluid dram, and current enter in Set under a well intubate; Simultaneously lower piston is up, and separated with draining connector, the second leakage fluid dram is communicated with draining connector, from returning to liquid in Set under a well, enters water tank; When the second inlet feed liquor, lower piston is descending, with draining connector horn mouth fitted seal, the second inlet is communicated with the second leakage fluid dram, and current enter in Set under a well oil pipe, simultaneously, upper piston is descending, separated with sphere plug, the first leakage fluid dram is communicated with draining connector, and the water in intubate returns into water tank; While injecting High-Pressure Water in intubate, current enter in plug through intubate, plug and bridge-type joint fitted seal, current enter A chamber, and descending along the annular space of stator bore and outer tube composition, Water Pressure is on mobile cylinder barrel lower section, promote mobile cylinder barrel up, now travelling valve cuts out, standing valve opens, and travelling valve upper liquid, by lifting, completes imbibition process in mobile cylinder barrel; When mobile cylinder barrel runs to top dead centre, commutation spring in compression, the well washing hole on mobile cylinder barrel moves past the position of standing valve, and current are entered and in mobile cylinder barrel, are completed release well-flushing by well washing hole; Now, the commutation of ground hydraulic-control valve, in oil pipe, inject water under high pressure, current are through oil pipe, by the B passage of bridge-type joint, by Water Pressure on mobile cylinder barrel upper section, effect at hydraulic pressure moves down moveable cylinder, travelling valve is opened, standing valve cuts out, and water in mobile cylinder barrel enters in oil pipe through travelling valve, when lower one-stroke by lifting; From the liquid of extracting out in well, enter in water tank, by bleed off pipe, discharged, this partially liq is exactly extraction liquid.
Accompanying drawing explanation: Fig. 1 is coal bed gas concentric tube hydraulic piston mining device down-hole pump group schematic diagram, in 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, mobile cylinder barrel 11, upper commutation spring 12, standing valve 13, adjustment cap 14, lower plunger 15, spring shim 16, lower commutation spring 17, outer tube lower contact
Fig. 2 is pilot operated valve device structural representation, in figure 18, upper flange 19, sphere plug 20, upper cylinder barrel 21, upper piston 22, the first inlet 23, intermediate seal joint 24, the second inlet 25, lower cylinder barrel 26, lower piston 27, draining connector 28, lower flange 29, the first leakage fluid dram 30, piston rod 31, the second leakage fluid dram
Fig. 3 is coal bed gas concentric tube hydraulic piston mining device down-hole pump ground flow schematic diagram, in figure 32, ground hydraulic station 33, hydraulic injection pump 34, pilot operated valve device 35, water tank 36, bleed off pipe
The specific embodiment: embodiment 1, the present invention are comprised of coal bed gas concentric tube hydraulic piston mining device down-hole pump group, pilot operated valve device, coal bed gas concentric tube hydraulic piston mining device above ground portion, bridge-type joint 2 is loaded in outer tube top connection 5, 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 is suspended in outer tube 9 by being threaded with bridge-type joint 2; Travelling valve 6 is with upper plug 7 by being threaded, and upper plug 7 is connected with mobile cylinder barrel 10, and upper commutation spring 11 is enclosed within on mobile cylinder barrel 10, and adjustment cap 13 is 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, lower commutation spring 16 are enclosed within on lower plunger 14, and outer tube lower contact 17 is threaded with outer tube 9.
Embodiment 2, upper flange 18 are arranged on the top of cylinder barrel 20, have sphere plug 19 in the top of upper cylinder barrel 20; The first inlet 22, the first leakage fluid dram 29 are welded on respectively on cylinder barrel 20, and the second inlet 24, the second leakage fluid dram 31 are welded on respectively on lower 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 is through intermediate seal joint 23 endoporus; It is middle with lower flange 28 that draining connector 27 is positioned at lower cylinder barrel 25.
Embodiment 3, at ground hydraulic station 32, connecting hydraulic injection pump 33, hydraulic injection pump 33 is connected with pilot operated valve device 34, water tank 35 respectively, is connecting bleed off pipe 36 on water tank 35.
Embodiment 4, method of work of the present invention are: hydraulic oil pump is given hydraulic injection pump fuel feeding under the drive of motor, and hydraulic injection pump pumps, and the water in water tank is quantitatively injected in pilot operated valve device; Hydraulic oil pump motor is realized speed governing by frequency converter, thereby reach, regulates the discharge capacity of hydraulic injection pump to regulate; The water of discharging from hydraulic injection pump enters pilot operated valve device the 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 the first inlet 22 is communicated with the first leakage fluid dram 29, and current enter in Set under a well intubate 1; Simultaneously lower piston 26 is up, and separated with draining connector 27, the second leakage fluid dram 31 is communicated with draining connector 27, from returning to liquid in Set under a well, enters water tank; When the second inlet 24 feed liquor, lower piston 26 is descending, with draining connector 27 horn mouth fitted seal, the second inlet 24 is communicated with the second leakage fluid dram 31, and current enter in Set under a well oil pipe, simultaneously, upper piston 21 is descending, separated with sphere plug 19, the first leakage fluid dram 29 is communicated with draining connector 27, and the water in intubate 1 returns into water tank 35; When the interior injection High-Pressure Water of intubate 1, current enter in plug 4 through intubate 1, plug 4 and bridge-type joint 2 fitted seal, current enter A chamber, and descending with the annular space that outer tube 9 forms along stator bore 8, Water Pressure is on mobile cylinder barrel 10 lower sections, promote mobile cylinder barrel 10 up, now travelling valve 6 cuts out, standing valve 12 opens, and travelling valve 6 upper liquids, by lifting, complete imbibition process in mobile cylinder barrel 10; When mobile cylinder barrel 10 runs to top dead centre, commutation spring 11 in compression, the well washing hole on mobile cylinder barrel 10 moves past the position of standing valve 12, and current are entered in mobile cylinder barrel 10 and are completed release well-flushing by well washing hole; Now, the commutation of ground hydraulic-control valve, in oil pipe, inject water under high pressure, current are through oil pipe, by the B passage of bridge-type joint 2, by Water Pressure 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 water in mobile cylinder barrel 10 enters in oil pipe through travelling valve 6, when lower one-stroke by lifting; From the liquid of extracting out in well, enter in water tank 35, by bleed off pipe 36, discharged, this partially liq is exactly extraction liquid.
Claims (3)
1. coal bed gas well concentric tube hydraulic piston mining device, it is comprised of coal bed gas well concentric tube hydraulic piston mining device down-hole pump group, pilot operated valve device, coal bed gas well concentric tube hydraulic piston mining device above ground portion, it is characterized in that: the structure of down-hole pump group is: bridge-type joint (2) is loaded in outer tube top connection (5), 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 is suspended in outer tube (9) by being threaded with bridge-type joint (2); Travelling valve (6) is with upper plug (7) by being threaded, and upper plug (7) is connected with mobile cylinder barrel (10), and it is upper that upper commutation spring (11) is enclosed within mobile cylinder barrel (10), and adjustment cap (13) is 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 it is upper that spring shim (15), lower commutation spring (16) are enclosed within lower plunger (14), and outer tube lower contact (17) is threaded with outer tube (9); The structure of pilot operated valve device is: upper flange (18) is arranged on the top of cylinder barrel (20), has sphere plug (19) in the top of upper cylinder barrel (20); It is upper that the first inlet (22), the first leakage fluid dram (29) are welded on respectively cylinder barrel (20), and the second inlet (24), the second leakage fluid dram (31) are welded on respectively on lower 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) is through intermediate seal joint (23) endoporus; It is middle with lower flange (28) that draining connector (27) is positioned at lower cylinder barrel (25).
2. coal bed gas well concentric tube hydraulic piston mining device according to claim 1, it is characterized in that: the structure of above ground portion is: at ground hydraulic station (32), connecting hydraulic injection pump (33), hydraulic injection pump (33) is connected with pilot operated valve device (34), water tank (35) respectively, is connecting bleed off pipe (36) on water tank (35).
3. the method for work of coal bed gas well concentric tube hydraulic piston mining device described in claim 1, is characterized in that: hydraulic oil pump is to hydraulic injection pump fuel feeding under the drive of motor, and hydraulic injection pump pumps, and the water in water tank is quantitatively injected in pilot operated valve device; Hydraulic oil pump motor is realized speed governing by frequency converter, thereby reach, regulates the discharge capacity of hydraulic injection pump to regulate; The water of discharging from hydraulic injection pump enters pilot operated valve device the first inlet (22), it is up that current promote upper piston (21), sphere plug (19) and upper piston (21) horn mouth fitted seal, the first inlet (22) is communicated with the first leakage fluid dram (29), and current enter in down-hole pump group intubate (1); Simultaneously lower piston (26) is up, and separated with draining connector (27), the second leakage fluid dram (31) is communicated with draining connector (27), from returning to liquid in down-hole pump group, enters water tank; When the second inlet (24) feed liquor, lower piston (26) is descending, with draining connector (27) horn mouth fitted seal, the second inlet (24) is communicated with the second leakage fluid dram (31), and current enter in down-hole pump group oil pipe, simultaneously, upper piston (21) is descending, separated with sphere plug (19), the first leakage fluid dram (29) is communicated with draining connector (27), and the water in intubate (1) returns into water tank (35); While injecting High-Pressure Water in intubate (1), current enter in plug (4) through intubate (1), plug (4) and bridge-type joint (2) fitted seal, current enter A chamber, and descending with the annular space that outer tube (9) forms along stator bore (8), Water Pressure is on mobile cylinder barrel (10) lower section, promote mobile cylinder barrel (10) up, now travelling valve (6) cuts out, standing valve (12) opens, and travelling valve (6) upper liquid is by lifting, and mobile cylinder barrel completes imbibition process in (10); When mobile cylinder barrel (10) runs to top dead centre, commutation spring (11) in compression, the well washing hole on mobile cylinder barrel (10) moves past the position of standing valve (12), and current are entered in mobile cylinder barrel (10) and are completed release well-flushing by well washing hole; Now, the commutation of ground hydraulic-control valve, in oil pipe, inject water under high pressure, current are through oil pipe, by the B passage of bridge-type joint (2), by Water Pressure 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 in mobile cylinder barrel (10) enters in oil pipe through travelling valve (6), when lower one-stroke by lifting; From the liquid of extracting out in well, enter in water tank (35), by bleed off pipe (36), discharged, this partially liq is exactly extraction liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN102758602B true CN102758602B (en) | 2014-11-26 |
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| CN103321612B (en) * | 2013-06-09 | 2014-03-26 | 苏州大一装备科技有限公司 | Water salvaging type drainage and gas production machine |
| CN105443082B (en) * | 2016-01-11 | 2018-03-20 | 韩祥林 | Linear electric motors drive hydraulic driven oil recovery oil pumper |
| 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 |
| 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 |
| 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 |
| CN110905453B (en) * | 2019-12-16 | 2022-02-18 | 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 |
| 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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| 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 |
| 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 methane discharge well uninterruptedly |
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- 2012-07-12 CN CN201210240734.8A patent/CN102758602B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 methane discharge well uninterruptedly |
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