CN108506179B - Oil well liquid drives reciprocal oil pumping system - Google Patents
Oil well liquid drives reciprocal oil pumping system Download PDFInfo
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- CN108506179B CN108506179B CN201810529145.9A CN201810529145A CN108506179B CN 108506179 B CN108506179 B CN 108506179B CN 201810529145 A CN201810529145 A CN 201810529145A CN 108506179 B CN108506179 B CN 108506179B
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- liquid
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- produced
- reversing
- fluid
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- 239000007788 liquid Substances 0.000 title claims abstract description 265
- 239000003129 oil well Substances 0.000 title claims abstract description 57
- 238000005086 pumping Methods 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 claims description 209
- 238000004519 manufacturing process Methods 0.000 claims description 33
- 238000004146 energy storage Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- 210000002445 nipple Anatomy 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 62
- 230000015572 biosynthetic process Effects 0.000 description 20
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
- F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
- F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
- F04B47/10—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid the units or parts thereof being liftable to ground level by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
Abstract
The invention discloses a liquid-driven reciprocating oil pumping system of an oil well, relates to a liquid-driven rodless oil pumping system in the technical field of artificial lifting, and particularly relates to a liquid-driven rodless oil pumping system which adopts a ground power device to generate high-pressure power liquid, and the high-pressure power liquid is transmitted to an underground reversing oil pumping unit through a power liquid pipe or an oil pipe and other channels in a shaft to drive an oil well pump to work. The device comprises a working cylinder, a hydraulic cylinder, a piston rod, a hydraulic cylinder, a piston, a produced liquid inlet valve ball, a produced liquid outlet valve ball and a two-position four-way reversing valve; the working cylinder is connected to the lower end of the oil pipe and is lowered into the oil well along with the oil pipe. The produced liquid inlet valve ball comprises a produced liquid inlet valve ball A and a produced liquid inlet valve ball B; the produced liquid drain valve ball comprises a produced liquid drain valve ball A and a produced liquid drain valve ball B; the two-position four-way valve comprises a two-position four-way reversing valve core and a two-position four-way reversing valve seat. The two-position four-way reversing valve core comprises two slide bars, a reversing push plate A, a reversing push plate B, a permanent magnet ring, a liquid inlet valve ball A, a liquid inlet valve ball B, a reversing liquid discharge valve ball A and a reversing liquid discharge valve ball B.
Description
Technical Field
The invention discloses a liquid-driven reciprocating oil pumping system of an oil well, relates to a liquid-driven rodless oil pumping system in the technical field of artificial lifting, and particularly relates to a liquid-driven rodless oil pumping system which adopts a ground power device to generate high-pressure power liquid, and the high-pressure power liquid is transmitted to an underground reversing oil pumping unit through a power liquid pipe or an oil pipe and other special channels in a shaft to drive an oil well pump to work. The produced liquid of the oil well and the spent power liquid are conveyed to the ground through channels such as an oil pipe or an oil sleeve annulus, and part of the produced liquid is used as the power liquid for recycling after necessary degassing and desanding treatment, so that the novel design has higher operation efficiency, can adapt to the practical novel design of a special well, and can be widely popularized and applied in the field of artificial lifting of the oil field.
Background
In the field of oilfield artificial lifting technology, the existing artificial lifting technology can be divided into two main types, namely rod lifting and rodless lifting.
The hydraulic piston pump applied in the oil field for more than 20 years belongs to rodless lifting, crude oil is used as power fluid to drive a downhole unit to reciprocate, so that the produced fluid of the oil well is lifted to the ground. And then, the stratum sewage is used as power liquid, so that the working environment of the unit is rapidly deteriorated, abrasion is aggravated, and the reversing pressure difference cannot be established. According to whether the spent power fluid is mixed with the oil well produced fluid, the spent power fluid is divided into an open type fluid and a closed type fluid. For an open hydraulic piston pump, spent power fluid and oil well produced fluid are mixed and then conveyed to the ground, and then oil-water separation is carried out, so that separated crude oil is used as power fluid for recycling. For a closed hydraulic piston pump, spent power liquid returns to the ground for recycling through a single flow passage. After this, an open hydraulic piston pump with the sewage from the purification station as power fluid has emerged. The hydraulic piston pump is out of use at present due to the problems of expensive oil-water separation treatment cost, complex down-hole tubular column structure, influence on the metering of oil well produced liquid, inadaptation of reversing slide valve structure and the like.
The invention patent (application number 200410074730.2) of Beijing Diwil petroleum and natural gas technology development limited company provides a rodless hydraulic oil pumping system which uses clear water as power fluid, and the power-free fluid is not mixed with oil well produced fluid, but returns from an original pipeline. When the power fluid returns, the power fluid does not work, and the down-hole unit performs a down-stroke by means of the suspended weight at the lower part of the travelling valve. There are several problems with this technique: 1. the up-stroke and down-stroke loads of the power system are seriously uneven, the up-stroke power system is required to lift not only the oil well produced liquid but also the suspended weight, the down-stroke power system does not work, the power system has high power and low power utilization rate, and a larger energy storage device is required to be configured; 2. down stroke time cannot be adjusted by means of suspended weight down; 3. the well bevel angle cannot be too large, otherwise the well bevel angle cannot depend on the suspended weight to descend; 4. the reversing mechanism is placed on the ground, and the reversing response time is long; 5. although a closed system is adopted, the problem of power fluid leakage still exists, and the power fluid is supplemented by means of transporting or paving a clear water pipeline by a tractor, so that the cost is increased.
Disclosure of Invention
The invention aims to provide an oil well liquid drive reciprocating oil pumping system aiming at the defects, wherein a reversing mechanism adopts a ball valve (or a cone valve, an end face valve and the like) sealing mode, so that abrasion can be compensated; auxiliary reversing is carried out through the permanent magnet, so that reversing is guaranteed to be in place. The defect that the slide valve structure cannot adapt to a non-oily working medium is overcome, the working reliability of the reversing valve is ensured, and meanwhile, the reversing mechanism is arranged in the underground unit, so that the reversing is ensured to be timely.
The invention relates to a technical scheme for solving the technical problems of an oil well liquid drive reciprocating oil pumping system, which comprises the following steps:
the liquid-driven reciprocating oil pumping system for oil well includes working cylinder, liquid cylinder, piston rod, liquid cylinder, piston, liquid inlet valve ball for produced liquid, liquid outlet valve ball for produced liquid and two-position four-way reversing valve. The working cylinder is connected to the lower end of the oil pipe and is put into the oil well along with the oil pipe, the working cylinder is assembled into a whole by a plurality of layers of tubular columns through connection, and the working cylinder is provided with a power fluid flow passage, a stratum fluid flow passage, a produced fluid flow passage, a spent power fluid flow passage and a plurality of fluid flow passages such as a power fluid passage, a stratum fluid passage, a produced fluid passage and the like along with the oil pipe to be put into the oil well; all parts except the working cylinder are assembled into another whole body, and can be lifted down along with the small-diameter power fluid oil pipe, and the free throwing and the lifting of the fixed pipe column can be realized by adopting the positive and negative circulation of the power fluid; the piston A divides the hydraulic cylinder A into a power liquid cavity A and an oil pump cavity A; the piston B divides the hydraulic cylinder B into a power liquid cavity B and an oil pump cavity B; the piston A and the piston B are connected by a piston rod.
The upper part of the working cylinder is provided with a runner nipple, and a power liquid runner, a produced liquid and a spent power liquid outlet are arranged in the runner nipple. The inlet end of the power fluid flow passage is provided with a small-diameter oil pipe. The power fluid flow passage is communicated with the power fluid flow passage arranged on the working cylinder. The output liquid and the spent power liquid outlet are communicated with the output liquid and spent power liquid channel arranged on the working cylinder. An inlet and outlet valve seat A is arranged on one side of the lower part of the runner nipple. The inlet and outlet valve seat A is provided with a produced fluid outlet A and a produced fluid inlet valve ball A mounting seat which is communicated with the power fluid channel. And the output liquid outlet A is provided with an output liquid drain valve ball A mounting seat, and is communicated with an output liquid and spent power liquid channel.
And the installation seat of the produced liquid drain valve ball A is provided with a produced liquid drain valve ball A, and the produced liquid drain valve ball A is provided with a spring to form a one-way valve. And the installation seat of the produced liquid inlet valve ball A is provided with a produced liquid inlet valve ball A, and the produced liquid inlet valve ball A is provided with a spring to form a one-way valve.
The lower part of the working cylinder is provided with a water inlet and outlet valve seat B, the bottom of the working cylinder is provided with a tail pipe, the tail pipe is provided with a stratum liquid inlet, and the stratum liquid inlet is communicated with stratum liquid. The formation liquid inlet and outlet valve seat B is provided with a formation liquid inlet runner I and a formation liquid inlet runner II, one end of the formation liquid inlet runner I is communicated with a formation liquid inlet, the other end of the formation liquid inlet runner I is communicated with an oil pump cavity B, a lower part of the formation liquid inlet runner is provided with a production liquid inlet valve ball B mounting seat, the production liquid inlet valve ball B mounting seat is provided with a production liquid inlet valve ball B, the upper part of the production liquid inlet valve ball B is provided with a spring to form a one-way valve, one side of the upper part of the formation liquid inlet runner I is provided with a production liquid outlet B, the production liquid outlet B is communicated with production liquid and a spent power liquid runner, the production liquid outlet B is provided with a production liquid outlet valve ball B mounting seat, the production liquid outlet valve ball B is provided with a production liquid outlet valve ball B, and the production liquid outlet valve ball B is provided with a spring to form a one-way valve. And the stratum liquid inlet flow passage II is communicated with the stratum liquid flow passage.
The produced fluid inlet valve ball comprises a produced fluid inlet valve ball A and a produced fluid inlet valve ball B. The produced fluid drain valve ball comprises a produced fluid drain valve ball A and a produced fluid drain valve ball B. The produced liquid drain valve ball A is arranged on an installation seat of the produced liquid inlet valve ball A, and a pressure spring is arranged at the rear part of the produced liquid drain valve ball A to push the produced liquid drain valve ball A to form a one-way valve with a power liquid flow inlet end. The produced liquid drain valve ball B is arranged on the installation seat of the produced liquid drain valve ball A, and the rear part of the produced liquid drain valve ball B is provided with a pressure spring to push the produced liquid drain valve ball A on the installation seat of the produced liquid drain valve ball A to form a one-way valve.
The two-position four-way valve comprises a two-position four-way reversing valve core and a two-position four-way reversing valve seat. The two-position four-way reversing valve seat is longitudinally provided with a piston rod sliding mounting hole in the middle for mounting a piston rod, and sliding rod sliding mounting holes are respectively formed in two sides of the piston rod sliding mounting hole and are used for mounting a sliding rod. The middle part of the two-position four-way reversing valve seat is transversely provided with a soft magnetic ring A and a soft magnetic ring B, and the soft magnetic ring A and the soft magnetic ring B divide the interior of the reversing valve seat into an upper cavity, a middle cavity and a lower cavity respectively. One side of the reversing valve seat is provided with a reversing valve power fluid inlet P which is communicated with the upper cavity and the lower cavity. The upper part of the other side of the reversing valve seat is provided with a spent power liquid discharge port A, and the lower part of the other side of the reversing valve seat is provided with a spent power liquid discharge port B.
The two-position four-way reversing valve core comprises two slide bars, a reversing push plate A, a reversing push plate B, a permanent magnet ring, a liquid inlet valve ball A, a liquid inlet valve ball B, a reversing liquid discharge valve ball A and a reversing liquid discharge valve ball B. The middle parts of the reversing push plate A, the reversing push plate B and the permanent magnet ring are provided with piston rod mounting holes for mounting the piston rods.
The two sliding rods are respectively arranged in sliding rod sliding mounting holes arranged on the reversing valve seat, the permanent magnet ring is arranged in the middle cavity of the reversing valve seat and fixed in the middle of the two sliding rods, and the liquid inlet valve ball A and the liquid inlet valve ball B are respectively arranged in the upper cavity and the lower cavity of the reversing valve seat and fixed on one sliding rod. The reversing valve seat is provided with a sliding rod sliding mounting hole seat (valve seat).
The reversing liquid discharge valve ball A and the reversing liquid discharge valve ball B are respectively arranged at the outer sides of two ends of the reversing valve seat and are fixed on the other slide rod. The reversing push plate A and the reversing push plate B are respectively and fixedly arranged at the two end parts of the two slide bars.
The piston rod sequentially passes through the middle parts of the reversing push plate A, the reversing valve seat, the soft magnetic ring A, the permanent magnet ring, the soft magnetic ring B and the reversing push plate B to be provided with a piston rod mounting hole, the piston A and the boosting energy storage spring A are mounted on the upper part of the piston rod, the piston B and the boosting energy storage spring B are mounted on the lower part of the piston rod, and the piston A and the piston B are respectively fixed at the two end parts of the piston rod.
The two-position four-way valve is installed in the hydraulic cylinder A and the hydraulic cylinder B together with the piston A, the piston B and the piston rod.
When the piston A moves to a position close to the bottom dead center, the reversing push plate A is pushed, the reversing push plate A pushes the permanent magnet ring to be separated from the soft magnetic ring A through the sliding rod and is attracted with the soft magnetic ring B, at the moment, power fluid enters the power fluid cavity A, and spent power fluid is discharged out of the power fluid cavity B; when the piston B moves to a position close to the top dead center, the reversing push plate B is pushed, the reversing push plate B pushes the permanent magnet ring to be separated from the soft magnetic ring B through the sliding rod and is attracted with the soft magnetic ring A, at the moment, power fluid enters the power fluid cavity B, and spent power fluid is discharged out of the power fluid cavity A.
The oil well liquid-driven reciprocating oil pumping system has the beneficial effects that: providing fluid power for the downhole unit by using a pipeline; mixing the spent power fluid and the oil well produced fluid and conveying to the ground; the present invention provides a variety of string options during oil recovery. Scheme 1: the working cylinder is connected to the lower end of the oil pipe and goes into the well, the underground unit is inserted into the working cylinder along with the small-diameter oil pipe, the small-diameter oil pipe is a power fluid downlink channel, the oil pipe is an upward channel of spent power fluid and oil well produced fluid, and the annulus of the oil sleeve can test the working fluid level; scheme 2: the working cylinder is connected with the lower end of the oil pipe and goes into the well, the oil sleeve annulus is sealed by the packer, the oil pipe is a power fluid descending channel, the oil sleeve annulus is an ascending channel of spent power fluid and oil well produced fluid, and the downhole unit can realize free casting and fishing of the fixed pipe string by utilizing forward and reverse circulation of the power fluid in the oil pipe.
The liquid-driven reciprocating oil pumping system for the oil well is arranged in the oil well, can be arranged at any depth and any position (a straight well section, an inclined well section, a horizontal section and the like) according to the requirement, realizes up and down strokes by utilizing liquid power, has uniform working load, small installed power of the system and high power utilization rate.
The invention adopts the sealing modes of ball valve, cone valve, section valve and the like, and can compensate abrasion; the reversing mechanism is arranged in the underground unit, so that reversing response is more timely, the system structure is simplified, and the cost is saved; the upper and lower double power cylinders and the double pumps are symmetrically arranged, so that the system liquid discharge amount is increased, the power system load is uniform, and the power utilization rate is high.
Drawings
The invention will be further described with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of a structure of a liquid-driven reciprocating oil pumping system of an oil well, and a working flow schematic diagram of a power liquid entering a liquid cylinder A (7) to push a piston A (8) to move upwards is an example of the invention;
FIG. 2 is a schematic diagram of a two-position four-way reversing valve of an oil well liquid-driven reciprocating oil pumping system.
In the figure, 1. An oil pipe; 2. a small diameter oil pipe; 3. a power fluid flow path; 4. a working cylinder; 5. a valve seat A for feeding and discharging; 6. a produced liquid inlet valve ball A;7. a hydraulic cylinder A;8. a piston A;9. boosting an energy storage spring A;10. a reversing push plate A;11. a slide bar; 12. two-position four-way reversing valve seat; 13. a liquid inlet valve ball A;14. a soft magnetic ring A;15. a reversing valve power fluid inlet P;16. a permanent magnet ring; 17. a soft magnetic ring B;18. a liquid inlet valve ball B;19. a piston rod; 20. a reversing push plate B;21. a hydraulic cylinder B;22. boosting an energy storage spring B;23. a piston B;24. a formation fluid flow passage; 25. a produced liquid inlet valve ball B;26. a formation fluid inlet; 27. a tail pipe; 28. an inlet and outlet valve seat B;29. a produced liquid drain valve ball B;30. a produced liquid outlet B;31. an oil pump cavity B;32. a flow passage for the produced liquid and the spent power liquid; 33. a power fluid cavity B;34. a liquid discharge valve ball B;35. a spent power fluid outlet B;36. a spent power fluid discharge port A;37. a liquid discharge valve ball A;38. a power fluid cavity A;39. the oil pump cavity A;40. a produced liquid outlet A;41. a liquid discharge valve ball A is produced; 42. a runner nipple; 43. a produced liquid and spent power liquid outlet; 44. a two-position four-way reversing valve;
10-1, a piston rod mounting hole; 12-1, a piston rod sliding mounting hole; 12-2, a sliding rod sliding mounting hole.
Detailed Description
Referring to fig. 1 and 2, an oil well liquid drive reciprocating oil pumping system comprises a working cylinder (4), a liquid cylinder A (7), a piston A (8), a produced liquid inlet valve ball A (6), a produced liquid outlet valve ball A (41), a piston rod (19), a liquid cylinder B (21), a piston B (23), a produced liquid inlet valve ball B (25), a produced liquid outlet valve ball B (29) and a two-position four-way reversing valve (44). The working cylinder (4) is connected to the lower end of the oil pipe (1) and is put into an oil well along with the oil pipe (1), the working cylinder (4) is assembled into a whole through a plurality of layers of pipe columns by connection, the working cylinder is provided with a power fluid flow channel 3, a stratum fluid flow channel 24, a produced fluid and spent power fluid flow channel 32 along with the oil pipe (1) to be put into the oil well, and a plurality of fluid flow channels such as the power fluid channel, the stratum fluid channel, the produced fluid channel and the like can be provided; all other parts except the working cylinder (4) are assembled into another whole, and can be lifted down along with the small-diameter power fluid oil pipe (2), and the free throwing and the fishing of the fixed pipe column can be realized by adopting the positive and negative circulation of power fluid; the piston A (8) divides the hydraulic cylinder A (7) into a power liquid cavity A (38) and an oil pump cavity A (39); the piston B (21) divides the hydraulic cylinder B (21) into a power liquid cavity B (33) and an oil pump cavity B (31); the piston A (8) and the piston B (21) are connected by a piston rod (19).
The upper part of the working cylinder (4) is provided with a runner nipple (42), and a power liquid runner, a produced liquid and a spent power liquid outlet (43) are arranged in the runner nipple (42). The inlet end of the power fluid flow passage (3) is provided with a small-diameter oil pipe (2). The power fluid flow passage is communicated with a power fluid flow passage (3) arranged on the working cylinder (4). The output liquid and spent power liquid outlet (43) is communicated with the output liquid and spent power liquid flow passage (32) arranged on the working cylinder (4). An inlet and outlet valve seat A (5) is arranged on one side of the lower part of the runner nipple (42). The inlet and outlet valve seat A (5) is provided with a produced liquid outlet A (40) and a produced liquid inlet valve ball A (6) mounting seat, and the produced liquid inlet valve ball A (40) mounting seat is communicated with the power liquid flow channel (3). The produced liquid outlet A (40) is provided with a produced liquid drain valve ball A (41) installation seat, and the produced liquid outlet A (40) is communicated with the produced liquid and spent power liquid flow passage (32).
And the mounting seat of the produced fluid discharge valve ball A (41) is provided with the produced fluid discharge valve ball A (41), and the produced fluid discharge valve ball A (41) is provided with a spring to form a one-way valve. And the installation seat of the produced liquid inlet valve ball A (6) is provided with the produced liquid inlet valve ball A (6), and the produced liquid inlet valve ball A (6) is provided with a spring to form a one-way valve.
The lower part of the working cylinder (4) is provided with an inlet and outlet valve seat B (28), the bottom of the working cylinder (4) is provided with a tail pipe (27), the tail pipe (27) is provided with a stratum fluid inlet (26), and the stratum fluid inlet (26) is communicated with stratum fluid. The formation fluid drainage valve seat B (28) is provided with a formation fluid inlet runner I (28-1) and a formation fluid inlet runner II (28-2), one end of the formation fluid inlet runner I (28-1) is communicated with the formation fluid inlet (26), the other end of the formation fluid inlet runner I (28-1) is communicated with the oil well pump cavity B, the lower part of the formation fluid inlet runner I (28-1) is provided with a production fluid inlet valve ball B (25) mounting seat, the production fluid inlet valve ball B (25) mounting seat is provided with a production fluid inlet valve ball B (25), the upper part of the production fluid inlet valve ball B (25) is provided with a spring to form a one-way valve, one side of the upper part of the formation fluid inlet runner I (28-1) is provided with a production fluid outlet B (30), the production fluid outlet B (30) is communicated with the production fluid and the power fluid outlet runner (32), the production fluid outlet B (30) is provided with a production fluid drainage valve ball B (29) mounting seat, the production fluid drainage ball B (29) is arranged on the production fluid outlet ball B (29) mounting seat, and the production fluid inlet ball B (29) is provided with a production fluid outlet ball B (29) spring to form the one-way valve. The formation liquid inlet runner II (28-2) is communicated with the formation liquid runner (24).
The produced fluid inlet valve ball comprises a produced fluid inlet valve ball A and a produced fluid inlet valve ball B. The produced fluid drain valve ball comprises a produced fluid drain valve ball A and a produced fluid drain valve ball B. The produced liquid drain valve ball A is arranged on an installation seat of the produced liquid inlet valve ball A, and a pressure spring is arranged at the rear part of the produced liquid drain valve ball A to push the produced liquid drain valve ball A to form a one-way valve with the inlet end of the power liquid flow channel (3). The produced liquid drain valve ball B is arranged on the installation seat of the produced liquid drain valve ball A (41), and the rear part of the produced liquid drain valve ball B is provided with a pressure spring to push the produced liquid drain valve ball A against the installation seat of the produced liquid drain valve ball A (41) to form a one-way valve.
When the piston A (8) moves to a position close to the bottom dead center, the reversing push plate A (10) is pushed, the reversing push plate A (10) pushes the permanent magnet ring (16) to be separated from the soft magnetic ring A (14) through the sliding rod (11) and is attracted with the soft magnetic ring B (17), at the moment, power fluid enters the power fluid cavity A (38), and spent power fluid is discharged out of the power fluid cavity B (33); when the piston B (21) moves to a position close to the top dead center, the reversing push plate B (20) is pushed, the reversing push plate B (20) pushes the permanent magnet ring (16) to be separated from the soft magnetic ring B (17) through the sliding rod (11) and is attracted with the soft magnetic ring A (14), at the moment, power fluid enters the power fluid cavity B (33), and spent power fluid is discharged out of the power fluid cavity A (38).
The two-position four-way valve (44) comprises a two-position four-way reversing valve core and a two-position four-way reversing valve seat (12). The two-position four-way reversing valve seat (12) is longitudinally provided with a piston rod sliding mounting hole (12-1) for mounting a piston rod (19), and two sides of the piston rod sliding mounting hole (12-1) are respectively provided with a sliding rod sliding mounting hole (12-2) for mounting a sliding rod (11). The middle part of the reversing valve seat (12) is transversely provided with a soft magnetic ring A (14) and a soft magnetic ring B (17), and the soft magnetic ring A (14) and the soft magnetic ring B (17) divide the interior of the reversing valve seat (12) into an upper cavity, a middle cavity and a lower cavity which are respectively an upper cavity, a middle cavity and a lower cavity. A reversing valve power fluid inlet P (15) is arranged on one side of the reversing valve seat (12), and the reversing valve power fluid inlet P (15) is communicated with the upper cavity and the lower cavity. A spent power fluid discharge port A (36) is arranged at the upper part of the other side of the reversing valve seat (12), and a spent power fluid discharge port B (35) is arranged at the lower part of the other side of the reversing valve seat (12).
The two-position four-way reversing valve core comprises two sliding rods (11), a reversing push plate A (10), a reversing push plate B (20), a permanent magnet ring (16), a liquid inlet valve ball A (13), a liquid inlet valve ball B (18), a reversing liquid discharge valve ball A (37) and a reversing liquid discharge valve ball B (34). The middle parts of the reversing push plate A (10), the reversing push plate B (20) and the permanent magnet ring (16) are provided with piston rod mounting holes (10-1) for mounting the piston rods (19).
The two sliding rods (11) are respectively arranged in sliding rod sliding mounting holes (12-2) formed in the reversing valve seat (12), the permanent magnet ring (16) is arranged in a middle cavity of the reversing valve seat (12) and fixed in the middle of the two sliding rods (11), and the liquid inlet valve ball A (13) and the liquid inlet valve ball B (18) are respectively arranged in an upper cavity and a lower cavity of the reversing valve seat (12) and fixed on one sliding rod (11).
The reversing drain valve ball A (37) and the reversing drain valve ball B (34) are respectively arranged at the outer sides of two ends of the reversing valve seat (12) and are fixed on the other slide rod (11). The reversing push plate A (10) and the reversing push plate B (20) are respectively and fixedly arranged at the two end parts of the two slide bars (11).
The piston rod (19) sequentially passes through the reversing push plate A (10), the reversing valve seat (12), the soft magnetic ring A (14), the permanent magnet ring (16), the soft magnetic ring B (17) and the reversing push plate B (20), wherein piston rod mounting holes are formed in the middle of the piston A (8) and the boosting energy storage spring A (9) and are arranged on the upper portion of the piston rod (19), the piston B (23) and the boosting energy storage spring B (22) are arranged on the lower portion of the piston rod (19), and the piston A (8) and the piston B (23) are respectively fixed at two end portions of the piston rod (19).
The two-position four-way valve is installed in the hydraulic cylinder A (7) and the hydraulic cylinder B (21) together with the piston A (8), the piston B (23) and the piston rod (19).
The reversing valve seat (12) is provided with a plurality of sliding rod sliding mounting hole seats (12-3) serving as valve seats. The sliding rod sliding mounting hole (12-2) can be used as a liquid through hole.
The reversing valve core is at least provided with two slide bars (11), and the slide bar sliding mounting holes can be used as liquid through holes. In order to ensure that the overflow area is large enough, 6 sliding rods can be arranged in the reversing valve core, 3 sliding rods are used for installing the liquid inlet valve ball A and the liquid inlet valve ball B, and 3 sliding rods are used for installing the liquid outlet valve ball A and the liquid outlet valve ball B. The reversing push plate A and the reversing push plate B are respectively and fixedly arranged at two end parts of all six sliding rods.
The valve core of the two-position four-way reversing valve (44) is a valve ball (ball valve), and after the valve ball moves to a dead point position along with the sliding rod, the valve core (valve ball) is seated on a sliding rod sliding mounting hole seat (valve seat) (12-3) arranged on the reversing valve seat (12), so that sealing is ensured.
The two-position four-way reversing valve (44) is provided with P, A, B, O liquid flow ports, wherein the P port is communicated with power liquid, the A port is communicated with the liquid cylinder A (7), the B port is communicated with the liquid cylinder B (21), and the O port is a spent power liquid outlet, is communicated with the liquid cylinder A (7) and the liquid cylinder B (21) and is connected with an oil well produced liquid channel.
The valve core of the two-position four-way reversing valve (44) can be replaced by a cone valve or an end face valve.
The two-position four-way reversing valve (44) adopts a permanent magnet ring (16) to assist reversing, and the permanent magnet ring (16) is attracted with the soft magnetic ring A (14) or the soft magnetic ring B (17) to ensure reversing in place.
The piston A (8) is provided with a boosting energy storage spring A (9), the piston B (23) is provided with a boosting energy storage spring B (22), the impact of the piston on the push plate can be effectively buffered, and the valve core can be pushed to the other dead point position by the energy stored by the boosting energy storage spring after the permanent magnet leaves the soft magnetic ring.
The produced fluid inlet valve ball A (6), the produced fluid outlet valve ball A (41), the produced fluid inlet valve ball B (25) and the produced fluid outlet valve ball B (29) are all forced-closed pump valves, so that the unit can be used in special wells such as inclined wells and horizontal wells.
An embodiment of a fluid-driven reciprocating oil pumping system for an oil well: for an oil well liquid drive reciprocating oil pumping device taking a 2 7/8' oil pipe as an oil well basic pipe column, a power liquid cavity A (38) and an oil well pump cavity A (39) share a piston A (8), a power liquid cavity B (33) and an oil well pump cavity B (31) share a piston B (23), the outer diameter of the piston is about 45mm, and a sealing ring is arranged on the piston; the piston A (8) and the piston B (23) are connected into a whole through the piston rod (19) and synchronously move during working; the piston stroke is generally 600-2500 mm, the piston stroke can be determined according to the working position of the underground unit, and if the underground unit works in a deflecting section or a horizontal section, the shorter piston stroke is selected, so that the length of the unit can be greatly shortened. In order to ensure that the underground unit can reliably work at any position, the produced fluid inlet valve ball A (6), the produced fluid outlet valve ball A (41), the produced fluid inlet valve ball B (25) and the produced fluid outlet valve ball B (29) are forcibly closed by precompression springs. After the valve core of the two-position four-way reversing valve (44) moves to a dead point position, a valve ball is seated on a valve seat, so that sealing is ensured; the two ends of the two-position four-way reversing valve (44) are lengthened and extend into the power liquid cavity A (38) and the power liquid cavity B (33), and the reversing push plate A (10) and the reversing push plate B (20) are pushed by the movement of the piston to realize the reversing of the two-position four-way reversing valve (44); when the piston A (8) moves to a position close to the bottom dead center, the reversing push plate A (10) is pushed, the reversing push plate A (10) pushes the permanent magnet ring (16) to be separated from the soft magnetic ring A (14) through the sliding rod (11) and is attracted with the soft magnetic ring B (17), at the moment, power fluid enters the power fluid cavity A (38), and spent power fluid is discharged out of the power fluid cavity B (33); when the piston B (23) moves to a position close to the top dead center, the reversing push plate B (20) is pushed, the reversing push plate B (20) pushes the permanent magnet ring (16) to be separated from the soft magnetic ring B (17) through the sliding rod (11) and is attracted with the soft magnetic ring A (14), at the moment, power fluid enters the power fluid cavity B (33), and spent power fluid is discharged out of the power fluid cavity A (38). The working cylinder (4) is formed by connecting a plurality of layers of tubular columns, can provide channels with the radial direction of 2-4mm for stratum fluid, produced fluid and power fluid, can obviously increase the overflow area and reduces the flow resistance.
Brief description of working principle of automatic reversing device of oil well liquid drive reciprocating oil pumping system: the high-pressure power fluid enters a two-position four-way reversing valve (44) through a small-diameter oil pipe (2) and a reversing valve power fluid inlet P (15) channel on a working cylinder (4), when a valve core of the two-position four-way reversing valve (44) is in a lower position, the power fluid enters a power fluid cavity A (38), a piston A (8) is pushed to ascend, an oil pump cavity A (39) is a discharging process, an oil pump cavity B (31) is a sucking process, and a produced fluid of the oil pump cavity A (39) and a spent power fluid in the power fluid cavity B (33) enter a produced fluid and spent power fluid flow channel (32); when the piston reaches the vicinity of the top dead center, the piston B (23) pushes the push plate B (20), the push plate B (20) pushes the permanent magnet (16) to be separated from the soft magnetic ring B (17) through the sliding rod (11) and is attracted with the soft magnetic ring A (14), at the moment, power fluid enters the power fluid cavity B (33), the piston B (23) is pushed to move downwards, the oil-well pump cavity A (39) is in the suction process, the oil-well pump cavity B (31) is in the discharge process, and the produced fluid of the oil-well pump cavity B (31) and the spent power fluid in the power fluid cavity A (38) enter the produced fluid and the spent power fluid flow channel (32).
The invention relates to a liquid-driven reciprocating oil pumping system of an oil well, which comprises an underground reversing oil pumping unit and a middle pipe column for providing a liquid flow channel for conveying power liquid to the underground unit and conveying oil well produced liquid to the ground. The power fluid from the ground is conveyed to the underground reversing oil pumping unit through a power fluid pipe, the power cylinder is driven, the oil well pump is driven to work, and the spent power fluid and the oil well produced fluid are mixed and conveyed to the ground; the underground reversing oil pumping unit comprises a hydraulic cylinder A, a hydraulic cylinder B, a piston A, a piston B, a two-position four-way valve for controlling the flow direction of power fluid, a production fluid inlet valve ball A, a production fluid drain valve ball A, a production fluid inlet valve ball B, a production fluid drain valve ball B and the like which are connected in parallel and symmetrically arranged. Compared with the existing hydraulic piston pump, the hydraulic piston pump adopts the two-position four-way working ball valve for reversing, so that power fluid is alternately conveyed to the hydraulic cylinder A and the hydraulic cylinder B; the spent power fluid is mixed with the oil well produced fluid, but part of the produced fluid is recycled as the power fluid, so that the output metering of the oil well is not influenced. The invention has the characteristics of low oil extraction cost, high operation efficiency, adaptation to special well type horizontal wells and the like, free casting and fishing of a fixed pipe column, cluster lifting of cluster well groups and the like, and is suitable for underground reversing oil pumping units.
Claims (7)
1. An oil well liquid drives reciprocal oil pumping system which characterized in that: the device comprises a working cylinder, a hydraulic cylinder A, a piston rod, a hydraulic cylinder B, a piston B, a produced liquid inlet valve ball, a produced liquid outlet valve ball and a two-position four-way reversing valve; the working cylinder is connected to the lower end of the oil pipe and is put into the oil well along with the oil pipe, the working cylinder is assembled into a whole by a plurality of layers of tubular columns through connection, and the working cylinder is provided with a power fluid flow passage, a stratum fluid flow passage, a produced fluid flow passage and a spent power fluid flow passage along with the oil pipe to be put into the oil well, so that a plurality of fluid flow passages of the power fluid flow passage, the stratum fluid flow passage and the produced fluid flow passage can be provided; all parts except the working cylinder are assembled into another whole body, and can be lifted down along with the small-diameter power fluid oil pipe; the piston A divides the hydraulic cylinder A into a power liquid cavity A and an oil pump cavity A; the piston B divides the hydraulic cylinder B into a power liquid cavity B and an oil pump cavity B; the piston A and the piston B are connected by a piston rod;
the produced liquid inlet valve ball comprises a produced liquid inlet valve ball A and a produced liquid inlet valve ball B; the produced liquid drain valve ball comprises a produced liquid drain valve ball A and a produced liquid drain valve ball B; the produced liquid drain valve ball A is arranged on an installation seat of the produced liquid drain valve ball A, and a pressure spring is arranged at the rear part of the produced liquid inlet valve ball A to push the produced liquid inlet valve ball A to the power liquid flow inlet end to form a one-way valve; the produced liquid drain valve ball B is arranged on a produced liquid drain valve ball B mounting seat, and a pressure spring is arranged at the rear part of the produced liquid drain valve ball B to push the produced liquid drain valve ball B on the produced liquid drain valve ball B mounting seat to form a one-way valve;
the two-position four-way reversing valve comprises a two-position four-way reversing valve core and a two-position four-way reversing valve seat; the two-position four-way reversing valve seat is provided with a piston rod sliding mounting hole in the longitudinal middle for mounting the piston rod, and sliding rod sliding mounting holes are respectively formed in two sides of the piston rod sliding mounting hole for mounting the sliding rod; the middle part of the two-position four-way reversing valve seat is transversely provided with a soft magnetic ring A and a soft magnetic ring B, and the soft magnetic ring A and the soft magnetic ring B divide the interior of the reversing valve seat into an upper cavity, a middle cavity and a lower cavity respectively; a reversing valve power fluid inlet P is arranged on one side of the reversing valve seat and is communicated with the upper cavity and the lower cavity;
the upper part of the other side of the reversing valve seat is provided with a spent power liquid discharge port A, and the lower part of the other side of the reversing valve seat is provided with a spent power liquid discharge port B;
the two-position four-way reversing valve core comprises two sliding rods, a reversing push plate A, a reversing push plate B, a permanent magnet ring, a liquid inlet valve ball A, a liquid inlet valve ball B, a reversing liquid discharge valve ball A and a reversing liquid discharge valve ball B; the middle parts of the reversing push plate A, the reversing push plate B and the permanent magnet ring are provided with piston rod mounting holes for mounting the piston rods;
the two sliding rods are respectively arranged in sliding mounting holes of the sliding rods arranged on the reversing valve seat, the permanent magnet ring is arranged in a middle cavity of the reversing valve seat and fixed in the middle of the two sliding rods, and the liquid inlet valve ball A and the liquid inlet valve ball B are respectively arranged in an upper cavity and a lower cavity of the reversing valve seat and fixed on one sliding rod;
the reversing liquid discharge valve ball A and the reversing liquid discharge valve ball B are respectively arranged at the outer sides of two ends of the reversing valve seat and fixed on the other slide bar, and the reversing push plate A and the reversing push plate B are respectively and fixedly arranged at the two ends of the two slide bars;
the piston rod sequentially passes through the middle parts of the reversing push plate A, the soft magnetic ring A, the permanent magnet ring, the soft magnetic ring B and the reversing push plate B, the piston A and the boosting energy storage spring A are arranged on the upper part of the piston rod, the piston B and the boosting energy storage spring B are arranged on the lower part of the piston rod, and the piston A and the piston B are respectively fixed at the two end parts of the piston rod;
the upper part of the working cylinder is provided with a runner nipple, a power liquid runner, a produced liquid and a spent power liquid outlet are arranged in the runner nipple, the inlet end of the power liquid runner is provided with a small-diameter power liquid oil pipe, the power liquid runner is communicated with the power liquid runner arranged on the working cylinder, the produced liquid and the spent power liquid outlet are communicated with the produced liquid and the spent power liquid runner arranged on the working cylinder, and one side of the lower part of the runner nipple is provided with an inlet and outlet valve seat A;
the lower part of the working cylinder is provided with an inlet and outlet valve seat B.
2. An oil well fluid-driven reciprocating oil pumping system according to claim 1 wherein: the water inlet valve seat A is provided with a produced fluid outlet A and a produced fluid inlet valve ball A mounting seat, the produced fluid inlet valve ball A mounting seat is communicated with the power fluid flow channel, the produced fluid outlet A is provided with a produced fluid liquid discharge valve ball A mounting seat, and the produced fluid outlet A is communicated with the produced fluid and the spent power fluid flow channel.
3. An oil well fluid-driven reciprocating oil pumping system according to claim 1 or 2, wherein: and the installation seat of the produced liquid drain valve ball A is provided with a produced liquid drain valve ball A, and the produced liquid drain valve ball A is provided with a spring to form a one-way valve.
4. An oil well fluid-driven reciprocating oil pumping system according to claim 1 wherein: the bottom of the working cylinder is provided with a tail pipe, the tail pipe is provided with a stratum fluid inlet, and the stratum fluid inlet is communicated with stratum fluid.
5. An oil well fluid-driven reciprocating oil pumping system according to claim 1 wherein: the oil pump is characterized in that the water inlet and outlet valve seat B is provided with a stratum liquid inlet runner I and a stratum liquid inlet runner II, one end of the stratum liquid inlet runner I is communicated with a stratum liquid inlet, the other end of the stratum liquid inlet runner I is communicated with the oil pump cavity B, the lower part of the stratum liquid inlet runner is provided with a production liquid inlet valve ball B mounting seat, the production liquid inlet valve ball B mounting seat is provided with a production liquid inlet valve ball B, and the upper part of the production liquid inlet valve ball B is provided with a spring to form a one-way valve; one side of the upper part of the stratum liquid inlet flow passage is provided with a produced liquid outlet B which is communicated with the produced liquid and spent power liquid flow passage, and the produced liquid outlet B is provided with a produced liquid drain valve ball B mounting seat; and the stratum liquid inlet flow passage II is communicated with the stratum liquid flow passage.
6. An oil well fluid-driven reciprocating oil pumping system according to claim 1 wherein:
the two-position four-way reversing valve is provided with P, A, B, O four fluid flow ports, wherein the port P is communicated with power fluid, the port A is communicated with the hydraulic cylinder A, the port B is communicated with the hydraulic cylinder B, and the port O is a spent power fluid outlet which is communicated with the hydraulic cylinder A and the hydraulic cylinder B and is connected with an oil well produced fluid channel.
7. An oil well fluid-driven reciprocating oil pumping system according to claim 1 wherein: the reversing valve seat is provided with a plurality of sliding rod sliding mounting hole seats serving as valve seats, and the sliding rod sliding mounting holes can serve as liquid through holes.
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| CN201810529145.9A CN108506179B (en) | 2018-05-29 | 2018-05-29 | Oil well liquid drives reciprocal oil pumping system |
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| CN201810529145.9A CN108506179B (en) | 2018-05-29 | 2018-05-29 | Oil well liquid drives reciprocal oil pumping system |
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| CN108506179B true CN108506179B (en) | 2024-03-22 |
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| CN112377154B (en) * | 2020-11-11 | 2023-02-07 | 中石化石油工程技术服务有限公司 | Automatic drainage device utilizing formation gas through magnetic reversing |
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|---|---|---|---|---|
| GB1424318A (en) * | 1974-09-13 | 1976-02-11 | Kobe Inc | Fluid operated pump |
| CN2329790Y (en) * | 1997-09-25 | 1999-07-21 | 胜利石油管理局无杆采油泵公司 | Non-spool differential reversing-type hydraulic piston pump |
| CN202100431U (en) * | 2011-06-13 | 2012-01-04 | 中国海洋石油总公司 | Underground automatic reciprocating fluid plunger pump with large discharging volume |
| CN208518830U (en) * | 2018-05-29 | 2019-02-19 | 南京聚源隆能源科技有限公司 | A kind of well liquid drive reciprocal reciprocating oil pumping system |
-
2018
- 2018-05-29 CN CN201810529145.9A patent/CN108506179B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1424318A (en) * | 1974-09-13 | 1976-02-11 | Kobe Inc | Fluid operated pump |
| CN2329790Y (en) * | 1997-09-25 | 1999-07-21 | 胜利石油管理局无杆采油泵公司 | Non-spool differential reversing-type hydraulic piston pump |
| CN202100431U (en) * | 2011-06-13 | 2012-01-04 | 中国海洋石油总公司 | Underground automatic reciprocating fluid plunger pump with large discharging volume |
| CN208518830U (en) * | 2018-05-29 | 2019-02-19 | 南京聚源隆能源科技有限公司 | A kind of well liquid drive reciprocal reciprocating oil pumping system |
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