CN112065698B - Multi-working-chamber oil pump capable of feeding liquid in full stroke - Google Patents
Multi-working-chamber oil pump capable of feeding liquid in full stroke Download PDFInfo
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- CN112065698B CN112065698B CN202011021383.2A CN202011021383A CN112065698B CN 112065698 B CN112065698 B CN 112065698B CN 202011021383 A CN202011021383 A CN 202011021383A CN 112065698 B CN112065698 B CN 112065698B
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- joint
- plunger
- valve
- liquid
- pump
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- 239000007788 liquid Substances 0.000 title claims abstract description 155
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 239000003129 oil well Substances 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 5
- 238000005086 pumping Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 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
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
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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
- 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
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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
- 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
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- 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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a multi-working-chamber oil pump for feeding liquid in a full stroke, which comprises an upper pump assembly and a lower pump assembly; the method is characterized in that: the upper pump assembly comprises an upper joint, an upper pump cylinder, a middle lower joint, an upper plunger, a diverter valve cover, a diverter valve, an upper reducer joint, a diverter joint and a lower reducer joint; the lower pump assembly comprises an annular valve upper joint, an annular valve assembly, an annular valve lower joint, a sealing cylinder, a lower pump cylinder, a pump cylinder coupling, a fixed valve assembly, a plunger upper joint, a sealing plunger, a plunger lower joint, a liquid distributing valve assembly, a lower plunger and a lower traveling valve assembly; an inner cavity of the upper pump cylinder between the upper plunger and the sealing cylinder is an upper working cavity; the inner cavity of the lower pump barrel between the sealing barrel and the lower plunger is a middle working cavity; the inner cavity of the lower pump barrel between the lower plunger and the fixed valve assembly is a lower working cavity. The invention adopts three working cavities to alternately suck and discharge liquid, realizes high-efficiency oil pumping with large discharge capacity, has lower production cost, and is suitable for oil wells with sufficient liquid supply.
Description
Technical Field
The invention relates to an improvement of an oil well pump, in particular to a multi-working-chamber oil well pump capable of feeding liquid in a full stroke, which is suitable for an oil well with sufficient liquid supply and realizes high-efficiency oil pumping with large discharge capacity.
Background
The oil pump comprises a pump barrel, a plunger, an oil pipe, an oil pumping rod, a fixed valve, an oil inlet valve, an oil outlet valve, an upper coupling, a lower coupling and a double-thread joint, wherein the upper end of the pump barrel is fixedly connected with the oil pipe through the upper coupling, the lower end of the pump barrel is fixedly connected with the fixed valve through the lower coupling, then the pump barrel is put into an oil well, the lower end of the plunger is fixedly provided with the oil inlet valve, the upper end of the plunger is fixedly connected with the oil outlet valve through the double-thread joint, and the upper end of the oil outlet valve is fixedly connected with the lower end of the oil pumping rod. Because the conventional oil pump is generally a working cavity, in order to realize large-displacement liquid extraction, the product specification is required to be continuously increased so as to improve the liquid extraction capacity of the oil pump. The defects are that: on one hand, as the specification of the pump is increased, the processing difficulty and the processing cost are increased, and the common production equipment cannot meet the production requirement; on the other hand, the outer diameter of the oil well pump is larger and larger, so that the oil well pump cannot be used in a conventional 5.5 inch or 7 inch sleeve, the application range of the large-specification oil well pump is greatly limited, and the development of a large-displacement well in an oil field is greatly restricted.
Disclosure of Invention
The invention aims to provide a multi-working-cavity oil pump which is suitable for an oil well with sufficient liquid supply, is convenient to install, adopts three working cavities to alternately suck and discharge liquid, and realizes full-stroke liquid feeding of large-discharge efficient oil pumping under the condition of ensuring smaller outer diameter.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the multi-working-cavity oil pump for feeding liquid in a full stroke comprises an upper pump assembly and a lower pump assembly; the method is characterized in that: the upper pump assembly comprises an upper joint, an upper pump cylinder, a middle lower joint, an upper plunger, a diverter valve cover, a diverter valve, an upper reducer joint, a diverter joint and a lower reducer joint; the upper end and the lower end of the upper pump cylinder are respectively and fixedly connected with an upper joint and a middle lower joint, and the upper joint is fixedly connected with the lower end of the oil pipe; an upper plunger joint, an upper plunger, a split joint and a lower reducer joint are arranged in the cavity of the upper pump cylinder, the upper plunger is in clearance fit with the upper pump cylinder, the lower end of the upper plunger joint is fixedly connected with the upper end of the upper plunger, the upper end of the upper plunger joint is fixedly connected with the lower end of the sucker rod, the lower end of the upper plunger is fixedly connected with the split joint, and the lower end of the split joint is fixedly connected with the lower reducer joint; the cavity of the upper plunger is internally provided with a diverter valve cover, a diverter valve and an upper reducing joint, the diverter valve is arranged in the diverter valve cover, and the lower end of the diverter valve cover is fixedly connected with the diverter joint through the upper reducing joint;
The lower pump assembly comprises an annular valve upper joint, an annular valve assembly, an annular valve lower joint, a sealing cylinder, a lower pump cylinder, a pump cylinder coupling, a fixed valve assembly, a plunger upper joint, a sealing plunger, a plunger lower joint, a liquid distributing valve assembly, a lower plunger and a lower traveling valve assembly; a sealing cylinder, a sealing plunger, a plunger lower joint, a liquid separating valve assembly, a lower plunger and a lower traveling valve assembly are arranged in the lower pump cylinder cavity; the upper end of the lower pump barrel is fixedly connected with the lower end of the ring valve assembly through a lower joint of the ring valve, and the lower end of the lower pump barrel is fixedly connected with the fixed valve assembly through a pump barrel coupling; the upper end of the ring valve assembly is fixedly connected with the lower end of the middle lower joint through the upper joint of the ring valve; the lower plunger is in clearance fit with the lower pump barrel, the lower end of the lower plunger is fixedly provided with a lower traveling valve assembly, and the upper end of the lower plunger is fixedly provided with a liquid separating valve assembly; the upper end of the liquid distributing valve assembly is fixedly connected with the lower end of the sealing plunger through a plunger lower joint; the upper end of the sealing plunger passes through the central hole of the ring valve assembly and is fixedly connected with the lower end of the lower reducer union through the upper union of the plunger; the sealing cylinder is sleeved on the sealing plunger in a clearance fit way, and the upper end of the sealing cylinder is fixedly connected with the lower joint of the ring valve;
An inner cavity of the upper pump cylinder between the upper plunger and the sealing cylinder is an upper working cavity; the inner cavity of the lower pump barrel between the sealing barrel and the lower plunger is a middle working cavity; the inner cavity of the lower pump barrel between the lower plunger and the fixed valve assembly is a lower working cavity.
The split joint consists of a split joint body, wherein the upper end part of the split joint body is provided with a split joint upper interface which is fixedly connected with the lower end of the upper reducer union through threads, the outer wall of the upper end of the split joint body is fixedly connected with the lower end of the upper plunger through threads, the lower end part of the split joint body is provided with a split joint lower interface which is fixedly connected with the upper end of the lower reducer union through threads; the side wall of the split joint body is internally provided with a radial channel and an axial channel, the axial channel is parallel to the central line of the split joint body, the upper end of the axial channel is communicated with the inner cavity of the upper plunger, the lower end of the axial channel is communicated with the inner cavity of the lower reducer union, the inner end of the radial channel is communicated with the inner cavity of the upper interface of the split joint, and the outer end of the radial channel is communicated with the inner cavity of the upper pump barrel below the upper plunger.
The two axial channels are symmetrically arranged; the two radial channels are symmetrically arranged, and the central axes of the two radial channels are coincident and perpendicular to the central line of the split-flow joint body.
The annular valve assembly comprises an annular valve body, an annular valve cover, a spring, a valve ball and a valve seat; the upper end of the ring valve body is provided with a ring valve upper connector, the ring valve upper connector is fixedly connected with the lower end of the ring valve upper connector through threads, the lower end of the ring valve body is provided with a ring valve lower connector, the ring valve lower connector is fixedly connected with the upper end of the ring valve lower connector through threads, the middle part of the ring valve body is provided with a ring valve central hole and a liquid discharge hole, the two ends of the ring valve central hole are respectively communicated with the inner cavities of the ring valve upper connector and the ring valve lower connector, the central axis of the liquid discharge hole is parallel to the central axis of the ring valve body, the lower end of the liquid discharge hole is radially provided with a liquid inlet hole, the upper end of the liquid discharge hole is communicated with the ring valve upper connector, the lower end of the liquid discharge hole is communicated with the inner end of the liquid inlet hole, and the outer end of the liquid inlet hole is communicated with the inner cavity of the oil well sleeve; the liquid draining hole is internally provided with a ring valve cover, a spring, a valve ball and a valve seat, the valve seat is fixedly arranged at the bottom of the liquid draining hole, the ring valve cover is fixedly arranged at the upper end opening part of the liquid draining hole, the valve ball is matched with the valve seat, and the spring is arranged between the ring valve cover and the valve ball.
The central axis of the central hole of the ring valve coincides with the central axis of the ring valve body.
The liquid discharge holes are arranged in 2-6, are uniformly distributed around the central hole of the ring valve, the liquid inlet holes are matched with the liquid discharge holes, and each liquid discharge hole is internally provided with a valve cover of the ring valve, a spring, a valve ball and a valve seat.
The liquid separating valve assembly consists of a liquid separating valve and a liquid separating joint, wherein the upper port of the liquid separating valve is fixedly connected with the lower end of the sealing plunger through the plunger lower joint so that the upper port of the liquid separating valve is communicated with the inner cavity of the sealing plunger, the lower end of the liquid separating valve is fixedly connected with the upper end of the liquid separating joint through threads, the lower port of the liquid separating valve is communicated with the inner cavity of the liquid separating joint, a liquid separating channel is arranged on the side wall of the liquid separating joint, the inner end of the liquid separating channel is communicated with the inner cavity of the liquid separating joint, and the outer end of the liquid separating channel is communicated with the inner cavity of the lower pump barrel.
The number of the liquid separation channels is 2-4, and the liquid separation channels are uniformly distributed on the side wall of the liquid separation joint.
The invention has the beneficial effects that: the device is convenient to install, adopts three working cavities to alternately suck and discharge liquid, and realizes high-efficiency oil pumping with large discharge capacity under the condition of ensuring smaller outer diameter; because the specification of the oil well pump is not increased, the conventional production equipment can be used for processing, the production cost of the oil well pump is reduced, and the oil well pump is suitable for oil wells with sufficient liquid supply and has wider application range.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged schematic cross-sectional view of the upper pump assembly of the present invention;
FIG. 3 is an enlarged schematic cross-sectional view of the lower pump assembly of the present invention;
FIG. 4 is an enlarged schematic view of a structural cross-section of the diverter coupling of the present invention;
FIG. 5 is a schematic cross-sectional view of the structure of the present invention taken along the direction A-A in FIG. 4;
FIG. 6 is an enlarged schematic cross-sectional view of the ring valve assembly of the present invention;
FIG. 7 is a schematic cross-sectional view of the ring valve body of the present invention taken along the direction B-B in FIG. 6;
FIG. 8 is an enlarged schematic cross-sectional view of the dispensing valve assembly of the present invention.
In the figure: 1. an upper joint; 2. a pump cylinder is arranged; 3. a middle lower joint; 4. an upper plunger joint; 5. an upper plunger; 6. a diverter valve housing; 7. a diverter valve; 8. an upper reducer union; 9. a shunt joint; 91. a shunt joint body; 92. an axial passage; 93. an upper interface of the shunt joint; 94. a radial passage; 95. a lower interface of the shunt joint; 10. a lower reducer union; 11. an upper joint of the ring valve; 12. a ring valve assembly; 120. a ring valve body; 121. a ring valve housing; 122. a spring; 123. a valve ball; 124. a liquid inlet hole; 125. a liquid discharge hole; 126. a ring valve central bore; 127. a valve seat; 128. an upper joint of the ring valve; 129. a lower port of the ring valve; 13. a lower joint of the ring valve; 14. a sealing cylinder; 15. a pump cylinder is arranged; 16. pump barrel coupling; 17. a fixed valve assembly; 18. a plunger upper joint; 19. a sealing plunger; 20. a plunger lower joint; 21. a liquid separating valve assembly; 211. a liquid separating valve; 212. a liquid separation joint; 213. a liquid separation channel; 22. a lower plunger; 23. a downstream traveling valve assembly; 24. an upper working chamber; 25. a middle working chamber; 26. a lower working chamber.
Detailed Description
The present invention is manufactured with reference to fig. 1,2, 3, 4, 5, 6, 7, and 8.
The multi-working-cavity oil pump for feeding liquid in a full stroke comprises an upper pump assembly and a lower pump assembly; the method is characterized in that: the upper pump assembly comprises an upper joint 1, an upper pump cylinder 2, a middle lower joint 3, an upper plunger joint 4, an upper plunger 5, a diverter valve cover 6, a diverter valve 7, an upper reducer joint 8, a diverter joint 9 and a lower reducer joint 10; the upper end and the lower end of the upper pump cylinder 2 are respectively fixedly connected with an upper joint 1 and a middle lower joint 3, and the upper joint 1 is fixedly connected with the lower end of an oil pipe; an upper plunger joint 4, an upper plunger 5, a split joint 9 and a lower reducer joint 10 are arranged in the cavity of the upper pump barrel 2, the upper plunger 5 is in clearance fit with the upper pump barrel 2, the lower end of the upper plunger joint 4 is fixedly connected with the upper end of the upper plunger 5, the upper end of the upper plunger joint 4 is fixedly connected with the lower end of the sucker rod, the lower end of the upper plunger 5 is fixedly connected with the split joint 9, and the lower end of the split joint 9 is fixedly connected with the lower reducer joint 10; a flow dividing valve cover 6, a flow dividing valve 7 and an upper reducing joint 8 are arranged in the cavity of the upper plunger 5, the flow dividing valve 7 is arranged in the flow dividing valve cover 6, and the lower end of the flow dividing valve cover 6 is fixedly connected with the flow dividing joint 9 through the upper reducing joint 8;
The lower pump assembly comprises an annular valve upper joint 11, an annular valve assembly 12, an annular valve lower joint 13, a sealing cylinder 14, a lower pump cylinder 15, a pump cylinder coupling 16, a fixed valve assembly 17, a plunger upper joint 18, a sealing plunger 19, a plunger lower joint 20, a liquid distributing valve assembly 21, a lower plunger 22 and a lower traveling valve assembly 23; the cavity of the lower pump cylinder 15 is internally provided with a sealing cylinder 14, a sealing plunger 19, a plunger lower joint 20, a liquid separating valve assembly 21, a lower plunger 22 and a lower traveling valve assembly 23; the upper end of the lower pump cylinder 15 is fixedly connected with the lower end of the ring valve assembly 12 through a ring valve lower joint 13, and the lower end of the lower pump cylinder 15 is fixedly connected with a fixed valve assembly 17 through a pump cylinder coupling 16; the upper end of the ring valve assembly 12 is fixedly connected with the lower end of the middle lower joint 3 through the upper joint 11 of the ring valve; the lower plunger 22 is in clearance fit with the lower pump cylinder 15, a lower traveling valve assembly 23 is fixedly arranged at the lower end of the lower plunger 22, and a liquid distributing valve assembly 21 is fixedly arranged at the upper end of the lower plunger 22; the upper end of the liquid distributing valve assembly 21 is fixedly connected with the lower end of the sealing plunger 19 through a plunger lower joint 20; the upper end of the sealing plunger 19 passes through the central hole 126 of the ring valve assembly 12 and is fixedly connected with the lower end of the lower reducer union 10 through the upper plunger union 18; the sealing cylinder 14 is sleeved on the sealing plunger 19 in a clearance fit way, and the upper end of the sealing cylinder 14 is fixedly connected with the lower joint 13 of the ring valve;
The inner cavity of the upper pump cylinder 2 between the upper plunger 5 and the sealing cylinder 14 is an upper working cavity 24; the inner cavity of the lower pump cylinder 15 between the sealing cylinder 14 and the lower plunger 22 is a middle working cavity 25; the inner cavity of the lower pump cylinder 15 between the lower plunger 22 and the fixed valve assembly 17 is a lower working cavity 26.
The split joint 9 is composed of a split joint body 91, the upper end part of the split joint body 91 is provided with a split joint upper interface 93, the split joint upper interface 93 is fixedly connected with the lower end of the upper reducer union 8 through threads, the outer wall of the upper end of the split joint body 91 is fixedly connected with the lower end of the upper plunger 5 through threads, the lower end part of the split joint body 91 is provided with a split joint lower interface 95, and the split joint lower interface 95 is fixedly connected with the upper end of the lower reducer union 10 through threads; the side wall of the split joint body 91 is internally provided with a radial channel 94 and an axial channel 92, the axial channel 92 is parallel to the central line of the split joint body 91, the upper end of the axial channel 92 is communicated with the inner cavity of the upper plunger 5, the lower end of the axial channel 92 is communicated with the inner cavity of the lower reducer joint 10, the inner end of the radial channel 94 is communicated with the inner cavity of the split joint upper interface 93, and the outer end of the radial channel 94 is communicated with the inner cavity of the upper pump barrel 2 below the upper plunger 5.
The two axial channels 92 are symmetrically arranged; the two radial channels 94 are symmetrically arranged, and the central axes of the two radial channels 94 are coincident and perpendicular to the central line of the split-flow connector body 91.
The ring valve assembly 12 comprises a ring valve body 120, a ring valve cover 121, a spring 122, a valve ball 123 and a valve seat 127; the upper end of the ring valve body 120 is provided with a ring valve upper connector 128, the ring valve upper connector 128 is fixedly connected with the lower end of the ring valve upper connector 11 through threads, the lower end of the ring valve body 120 is provided with a ring valve lower connector 129, the ring valve lower connector 129 is fixedly connected with the upper end of the ring valve lower connector 13 through threads, the middle part of the ring valve body 120 is provided with a ring valve central hole 126 and a liquid discharge hole 125, two ends of the ring valve central hole 126 are respectively communicated with inner cavities of the ring valve upper connector 128 and the ring valve lower connector 129, the central axis of the liquid discharge hole 125 is parallel to the central axis of the ring valve body 120, the lower end of the liquid discharge hole 125 is radially provided with a liquid inlet 124, the upper end of the liquid discharge hole 125 is communicated with the ring valve upper connector 128, the lower end of the liquid discharge hole 125 is communicated with the inner end of the liquid inlet 124, and the outer end of the liquid inlet 124 is communicated with the inner cavity of the oil well casing; the liquid discharge hole 125 in be equipped with ring valve cover 121, spring 122, valve ball 123 and disk seat 127, disk seat 127 is fixed to be set up in the bottom of liquid discharge hole 125, ring valve cover 121 is fixed to be set up in the upper end port portion of liquid discharge hole 125, valve ball 123 and disk seat 127 looks adaptation, be equipped with spring 122 between ring valve cover 121 and the valve ball 123.
The central axis of the central bore 126 coincides with the central axis of the body 120.
The number of the liquid discharge holes 125 is 2-6, the liquid discharge holes 125 are uniformly distributed around the central hole 126 of the annular valve, the liquid inlet holes 124 are matched with the liquid discharge holes 125, and each liquid discharge hole 125 is internally provided with an annular valve cover 121, a spring 122, a valve ball 123 and a valve seat 127.
The liquid separating valve assembly 21 is composed of a liquid separating valve 211 and a liquid separating joint 212, wherein the upper port of the liquid separating valve 211 is fixedly connected with the lower end of the sealing plunger 19 through the plunger lower joint 20, so that the upper port of the liquid separating valve 211 is communicated with the inner cavity of the sealing plunger 19, the lower end of the liquid separating valve 211 is fixedly connected with the upper end of the liquid separating joint 212 in a threaded manner, the lower port of the liquid separating valve 211 is communicated with the inner cavity of the liquid separating joint 212, a liquid separating channel 213 is arranged on the side wall of the liquid separating joint 212, the inner end of the liquid separating channel 213 is communicated with the inner cavity of the liquid separating joint 212, and the outer end of the liquid separating channel 213 is communicated with the inner cavity of the lower pump cylinder 15.
The number of the liquid separation channels 213 is 2-4, and the liquid separation channels are uniformly distributed on the side wall of the liquid separation joint 212.
When the invention is installed and used, the lower part of the disconnecting link is fixedly connected with the upper end of the upper plunger joint 4; the upper part of the disconnecting device is fixedly connected with the lower end of the sucker rod; then the lower pump assembly is put into the oil well casing pipe and is arranged on the wellhead; then the upper pump assembly is lifted up to be aligned with the lower pump assembly to be lowered down, and the lower reducer union 10 is fixedly connected with the upper plunger union 18; continuing to lower, connecting and fixing the middle lower joint 3 with the annular valve upper joint 11, so that the lower pump assembly and the upper pump assembly form a whole pump, and after the upper joint 1 is connected with an oil pipe, putting into an oil well casing; finally, the sucker rod is put into the well and connected with the upper plunger joint 4 through the connector.
The working process of the invention is as follows:
During the upward stroke, along with the upward movement of the upper plunger 5, the sealing plunger 19 and the lower plunger 22, the upper working cavity 24 is enlarged, the shunt valve 7 is closed, the valve ball 123 of the annular valve assembly 12 is opened, and the well liquid enters the upper working cavity 24 through the liquid inlet hole 124, the valve seat 127 and the liquid outlet hole 125 of the annular valve assembly 12 to finish the liquid suction of the upper working cavity 24; meanwhile, the middle working cavity 25 is reduced, the downstream valve assembly 23 is closed, the liquid dividing valve 211 of the liquid dividing valve assembly 21 is opened, and the oil stored in the middle working cavity 25 is discharged into an oil pipe through a liquid dividing channel 213 of the liquid dividing connector 212, the liquid dividing valve 211, an inner cavity of the sealing plunger 19, an upper plunger connector 18, a lower reducing connector 10, an axial channel 92 of the liquid dividing connector 9, an inner cavity of the upper plunger 5 and an outlet of the upper plunger connector 4, so that the liquid discharge of the middle working cavity 25 is completed; simultaneously, the lower working chamber 26 is enlarged, the downstream valve assembly 23 is closed, the fixed valve assembly 17 is opened, and well fluid enters the lower working chamber 26 to be sucked.
During the downward stroke, along with the descending of the upper plunger 5, the sealing plunger 19 and the lower plunger 22, the upper working cavity 24 is reduced, the valve ball 123 of the annular valve assembly 12 is closed by seat sealing, the shunt valve 7 is opened, the oil in the upper working cavity 24 is discharged into an oil pipe by the radial channel 94 of the shunt joint 9, the inner cavity of the upper reducer joint 8, the shunt valve 7, the inner cavity of the upper plunger 5 and the outlet of the upper plunger joint 4, and the liquid discharge of the upper working cavity 24 is completed; meanwhile, the middle working cavity 25 is enlarged, the lower working cavity 26 is reduced, the fixed valve assembly 17 is closed, the lower traveling valve assembly 23 is opened, the liquid dividing valve 211 of the liquid dividing valve assembly 21 is opened, and oil in the lower working cavity 26 enters the inner cavity of the liquid dividing joint 212 of the liquid dividing valve assembly 21 through the inner cavities of the lower traveling valve assembly 23 and the lower plunger 22; wherein a part of oil enters the middle working chamber 25 through a diversion channel 213 on the side wall of the liquid diversion joint 212; the other part of the oil passes through the upper port of the liquid separating valve 211 of the liquid separating valve assembly 21, the plunger lower joint 20, the inner cavity of the sealing plunger 19, the plunger upper joint 18, the lower reducing joint 10, the axial passage 92 of the split joint 9, the inner cavity of the upper plunger 5 and the outlet of the upper plunger joint 4, and finally is discharged into an oil pipe, and meanwhile, the liquid suction of the middle working cavity 25 and the liquid discharge of the lower working cavity 26 are completed.
Claims (6)
1. A multi-working chamber oil pump for feeding liquid in full stroke comprises an upper pump assembly and a lower pump assembly; the method is characterized in that: the upper pump assembly comprises an upper joint (1), an upper pump barrel (2), a middle lower joint (3), an upper plunger joint (4), an upper plunger (5), a diverter valve cover (6), a diverter valve (7), an upper reducer joint (8), a diverter joint (9) and a lower reducer joint (10); the upper end and the lower end of the upper pump cylinder (2) are respectively fixedly connected with an upper joint (1) and a middle lower joint (3), and the upper joint (1) is fixedly connected with the lower end of an oil pipe; an upper plunger joint (4), an upper plunger (5), a shunt joint (9) and a lower reducer union (10) are arranged in a cavity of the upper pump barrel (2), the upper plunger (5) and the upper pump barrel (2) are in clearance fit, the lower end of the upper plunger joint (4) is fixedly connected with the upper end of the upper plunger (5), the upper end of the upper plunger joint (4) is fixedly connected with the lower end of the sucker rod, the lower end of the upper plunger (5) is fixedly connected with the shunt joint (9), and the lower end of the shunt joint (9) is fixedly connected with the lower reducer union (10); a flow dividing valve cover (6), a flow dividing valve (7) and an upper reducing joint (8) are arranged in the cavity of the upper plunger (5), the flow dividing valve (7) is arranged in the flow dividing valve cover (6), and the lower end of the flow dividing valve cover (6) is fixedly connected with the flow dividing joint (9) through the upper reducing joint (8);
The lower pump assembly comprises an annular valve upper joint (11), an annular valve assembly (12), an annular valve lower joint (13), a sealing cylinder (14), a lower pump cylinder (15), a pump cylinder coupling (16), a fixed valve assembly (17), a plunger upper joint (18), a sealing plunger (19), a plunger lower joint (20), a liquid separating valve assembly (21), a lower plunger (22) and a lower traveling valve assembly (23); a sealing cylinder (14), a sealing plunger (19), a plunger lower joint (20), a liquid separating valve assembly (21), a lower plunger (22) and a lower traveling valve assembly (23) are arranged in the cavity of the lower pump cylinder (15); the upper end of the lower pump cylinder (15) is fixedly connected with the lower end of the ring valve assembly (12) through a lower ring valve connector (13), and the lower end of the lower pump cylinder (15) is fixedly connected with the fixed valve assembly (17) through a pump cylinder coupling (16); the upper end of the ring valve assembly (12) is fixedly connected with the lower end of the middle lower joint (3) through the upper joint (11) of the ring valve; the lower plunger (22) is in clearance fit with the lower pump cylinder (15), a lower traveling valve assembly (23) is fixedly arranged at the lower end of the lower plunger (22), and a liquid distributing valve assembly (21) is fixedly arranged at the upper end of the lower plunger (22); the upper end of the liquid distributing valve assembly (21) is fixedly connected with the lower end of the sealing plunger (19) through a plunger lower joint (20); the upper end of the sealing plunger (19) passes through a ring valve center hole (126) of the ring valve assembly (12) and is fixedly connected with the lower end of the lower reducer union (10) through a plunger upper joint (18); the sealing cylinder (14) is sleeved on the sealing plunger (19) in a clearance fit way, and the upper end of the sealing cylinder (14) is fixedly connected with the lower joint (13) of the ring valve;
The split joint (9) is formed by a split joint body (91), the upper end part of the split joint body (91) is provided with a split joint upper interface (93), the split joint upper interface (93) is fixedly connected with the lower end of the upper reducer union (8) through threads, the outer wall of the upper end of the split joint body (91) is fixedly connected with the lower end of the upper plunger (5) through threads, the lower end part of the split joint body (91) is provided with a split joint lower interface (95), and the split joint lower interface (95) is fixedly connected with the upper end of the lower reducer union (10) through threads; a radial channel (94) and an axial channel (92) are arranged in the side wall of the split joint body (91), the axial channel (92) is parallel to the central line of the split joint body (91), the upper end of the axial channel (92) is communicated with the inner cavity of the upper plunger (5), the lower end of the axial channel (92) is communicated with the inner cavity of the lower reducer union (10), the inner end of the radial channel (94) is communicated with the inner cavity of the split joint upper interface (93), and the outer end of the radial channel (94) is communicated with the inner cavity of the upper pump barrel (2) below the upper plunger (5);
The ring valve assembly (12) comprises a ring valve body (120), a ring valve cover (121), a spring (122), a valve ball (123) and a valve seat (127); the upper end of the ring valve body (120) is provided with a ring valve upper connector (128), the ring valve upper connector (128) is fixedly connected with the lower end of the ring valve upper connector (11) through threads, the lower end of the ring valve body (120) is provided with a ring valve lower connector (129), the ring valve lower connector (129) is fixedly connected with the upper end of the ring valve lower connector (13) through threads, the middle part of the ring valve body (120) is provided with a ring valve central hole (126) and a liquid discharging hole (125), two ends of the ring valve central hole (126) are respectively communicated with the inner cavities of the ring valve upper connector (128) and the ring valve lower connector (129), the central axis of the liquid discharging hole (125) is parallel to the central axis of the ring valve body (120), the lower end of the liquid discharging hole (125) is radially provided with a liquid inlet hole (124), the upper end of the liquid discharging hole (125) is communicated with the upper connector (128) of the ring valve, the lower end of the liquid discharging hole (125) is communicated with the inner end of the liquid inlet hole (124), and the outer end of the liquid inlet hole (124) is communicated with the inner cavity of the oil well casing; the liquid draining hole (125) in be equipped with ring valve cover (121), spring (122), valve ball (123) and disk seat (127), disk seat (127) are fixed to be set up in the bottom of liquid draining hole (125), ring valve cover (121) are fixed to be set up in the upper port portion of liquid draining hole (125), valve ball (123) and disk seat (127) looks adaptation are equipped with spring (122) between ring valve cover (121) and valve ball (123).
2. The full-stroke hydraulic multi-working chamber oil pump of claim 1, wherein: the two axial channels (92) are symmetrically arranged; the two radial channels (94) are symmetrically arranged, and the central axes of the two radial channels (94) are coincident and perpendicular to the central line of the split-flow joint body (91).
3. The full-stroke hydraulic multi-working chamber oil pump of claim 1, wherein: the central axis of the central hole (126) of the ring valve coincides with the central axis of the ring valve body (120).
4. The full-stroke hydraulic multi-working chamber oil pump of claim 1, wherein: the liquid discharge holes (125) are provided with 2-6 liquid discharge holes, the liquid discharge holes are uniformly distributed around the central hole (126) of the annular valve, the liquid inlet holes (124) are matched with the liquid discharge holes (125), and each liquid discharge hole (125) is internally provided with an annular valve cover (121), a spring (122), a valve ball (123) and a valve seat (127).
5. The full-stroke hydraulic multi-working chamber oil pump of claim 1, wherein: the liquid separating valve assembly (21) consists of a liquid separating valve (211) and a liquid separating joint (212), wherein the upper port of the liquid separating valve (211) is fixedly connected with the lower end of the sealing plunger (19) through a plunger lower joint (20), the lower end of the liquid separating valve (211) is fixedly connected with the upper end of the liquid separating joint (212) through threads, the lower port of the liquid separating valve (211) is communicated with the inner cavity of the liquid separating joint (212), a liquid separating channel (213) is arranged on the side wall of the liquid separating joint (212), the inner end of the liquid separating channel (213) is communicated with the inner cavity of the liquid separating joint (212), and the outer end of the liquid separating channel (213) is communicated with the inner cavity of the lower pump cylinder (15).
6. The full-stroke hydraulic multi-working chamber oil pump of claim 5, wherein: the liquid separation channels (213) are provided with 2-4 liquid separation channels and are uniformly distributed on the side wall of the liquid separation joint (212).
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| CN202011021383.2A CN112065698B (en) | 2020-09-25 | 2020-09-25 | Multi-working-chamber oil pump capable of feeding liquid in full stroke |
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| CN112065698B true CN112065698B (en) | 2024-05-24 |
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