CN105736336A - Two-barrel reciprocating balance type dual-action oil pump - Google Patents
Two-barrel reciprocating balance type dual-action oil pump Download PDFInfo
- Publication number
- CN105736336A CN105736336A CN201610273479.5A CN201610273479A CN105736336A CN 105736336 A CN105736336 A CN 105736336A CN 201610273479 A CN201610273479 A CN 201610273479A CN 105736336 A CN105736336 A CN 105736336A
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- China
- Prior art keywords
- pump barrel
- valve seat
- plunger
- pump
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
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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
- F04B53/10—Valves; Arrangement of valves
- F04B53/1087—Valve seats
-
- 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
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
- F04B53/125—Reciprocating valves
- F04B53/126—Ball 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/148—Pistons, piston-rods or piston-rod connections the piston being provided with channels which are coacting with the cylinder and are used as a distribution member for another piston-cylinder unit
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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
- F04B53/16—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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
Abstract
The invention discloses a two-barrel reciprocating balance type dual-action oil pump which comprises a pump head communicated with an oil pipe. An external pump barrel is arranged at the lower end of the pump head, a liquid outlet valve seat and a liquid inlet valve seat are arranged in the external pump barrel, and an internal pump barrel is arranged between the liquid outlet valve seat and the liquid inlet valve seat. A liquid filter pipe is arranged at the inner periphery of a free end of the external pump barrel, a flange joint is arranged at the lower end of the liquid filer pipe, and a plunger assembly reciprocating in the internal pump barrel sequentially penetrates the liquid filter pipe and the flange joint to be connected with a connection valve bonnet. The two-barrel reciprocating balance type dual-action oil pump has the advantages that by shapes and connection relation of the internal pump barrel and the plunger assembly, balance of resistances applied to a prime motor in a push-pull process is realized; an outer cavity formed between the internal pump barrel and the external pump barrel provides a sufficient installation and maintenance space for a lower cavity liquid inlet valve and a lower cavity liquid outlet valve, and reliability in operation is guaranteed; in addition, liquid discharge efficiency and energy saving efficiency can be improved effectively.
Description
Technical field
The invention belongs to a kind of oil well pump, be specifically related to the double; two merit oil well pump of a kind of two reciprocal balanced types.
Background technology
At present, reciprocating pair of merit oil well pump is the production facilities that domestic and international oil field is commonly used, the advantage of reciprocating pair of merit oil well pump is that oil well pump is driven by prime mover reciprocating sliding, both direction has lifting well liquid function, and the difference of ability that the shortcoming of reciprocating pair of merit oil well pump is oil well pump both direction lifting well liquid is bigger.
Analyzing reciprocating pair of merit oil well pump from concrete structure, reciprocating pair of merit oil well pump is overlapped various sizes of plunger by two and forms with pump barrel, and one end piston size is relatively big, and cross section is relatively big, and production fluid is more；The other end is by the bigger piston of same size and another smaller piston in combination, and the difference of both cross sections is inevitable less, thus causing that production fluid is less.So that driving prime mover of reciprocating pair of merit oil well pump in its push-pull operation process, suffered resistance is substantially uneven, can have a strong impact on discharge opeing effect and energy-saving effect for electronic submergence type oil well pump unit.
Summary of the invention
The present invention solves that prior art Problems existing proposes, its objective is to provide a kind of two reciprocal balanced types double; two merit oil well pump.
nullThe technical scheme is that the double; two merit oil well pump of a kind of two reciprocal balanced types，Including the pump head connected with oil pipe，Pump head lower end is provided with outer pump barrel，Outer pump barrel is provided with liquid valve seat、Feed liquor valve seat，Described liquid valve seat、Interior pump barrel it is provided with between feed liquor valve seat，Described outer pump barrel free end inner radius is provided with filtrate pipe，Described filtrate pipe lower end is provided with bump joint，The assembly for plunger moved back and forth in interior pump barrel sequentially passes through filtrate pipe、After bump joint be connected valve bonnet be connected，Described interior pump barrel includes the single pump barrel being fixed on assembling ladder place, liquid valve seat bottom、Pump barrel little of the combination that feed liquor valve base center hole fixes，And the single pump barrel of connection、Combine the big pump barrel of combination of little pump barrel，Described assembly for plunger includes the single plunger on top、The big plunger of combination of movement in combining big pump barrel、And the combination small plunger fixing with feed liquor valve base center hole，Described liquid valve seat lower surface、Single pump barrel inwall、Single plunger upper surface encloses formation epicoele，The big pump barrel inwall of described combination、Combine big plunger lower surface、Combine little pump barrel upper surface、Combination small plunger outer wall encloses formation cavity of resorption，Described liquid valve seat lower surface、Feed liquor valve seat upper surface、Outer pump barrel outer wall encloses formation exocoel，Described liquid valve seat upper end is provided with the inner core liquid valve that can block epicoele and the urceolus liquid valve that can block exocoel，Described feed liquor valve seat upper surface is provided with urceolus liquid feed valve，Described single plunger upper end is provided with the check (non-return) valve that can block assembly for plunger axially extending bore，The chamber of described connection valve bonnet is provided with the inner core liquid feed valve that can block bottom through-hole，The big pump barrel of described combination is formed the liquid-through hole that exocoel connects with cavity of resorption，Described filtrate pipe sidewall is formed filtrate hole.
The big plunger cross-sectional area of described combination is all higher than the cross-sectional area of single plunger, combination small plunger.
Described single plunger cross-sectional area should be slightly less than the difference of the cross-sectional area combining big plunger, combination small plunger.
Described combination big pump barrel internal diameter is all higher than single pump barrel, combines the internal diameter of little pump barrel.
Described liquid valve seat axial cross section is T-shaped.
Described pump head lower end is stepped, and the outer wall of described pump head is concordant with outer pump barrel outer wall.
The end difference of described filtrate pipe lower end and bump joint upper end fixes.
Described combination small plunger, the connected mode connected between valve bonnet are threaded.
It is between described outer pump barrel and liquid valve seat, feed liquor valve seat and is tightly connected.
It is between described interior pump barrel and liquid valve seat, feed liquor valve seat and is tightly connected.
The present invention achieves prime mover suffered resistance in push-and-pull process by interior pump barrel, the shape of assembly for plunger and annexation thereof and reaches the purpose of balance, exocoel between interior pump barrel, outer pump barrel is that cavity of resorption liquid feed valve, cavity of resorption liquid valve provide enough installations and safeguard space, ensure that reliability of operation, the present invention can effectively improve discharge opeing efficiency and energy-saving efficiency.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Wherein:
The 1 outer pump barrel of pump head 2
30 liquid valve seat 31 inner core liquid valves
Pump barrel in 32 urceolus liquid valves 40
41 single pump barrels 42 combine big pump barrel
43 combine little pump barrel 44 liquid-through hole
50 assembly for plunger 51 single plunger
52 combine big plunger 53 combines small plunger
54 check (non-return) valve 60 feed liquor valve seats
61 urceolus liquid feed valve 71 filtrate pipes
72 bump joints 80 connect valve bonnet
81 inner core liquid feed valve 91 epicoeles
92 cavity of resorption 93 exocoels.
Detailed description of the invention
Hereinafter, with reference to drawings and Examples, the present invention is described in detail:
nullAs shown in Figure 1，The double; two merit oil well pump of a kind of two reciprocal balanced types，Including the pump head 1 connected with oil pipe，Pump head 1 lower end is provided with outer pump barrel 2，Outer pump barrel 2 is provided with liquid valve seat 30、Feed liquor valve seat 60，Described liquid valve seat 30、Interior pump barrel 40 it is provided with between feed liquor valve seat 60，Described outer pump barrel 2 free end inner radius is provided with filtrate pipe 71，Described filtrate pipe 71 lower end is provided with bump joint 72，The assembly for plunger 50 moved back and forth in interior pump barrel 40 sequentially passes through filtrate pipe 71、After bump joint 72 be connected valve bonnet 80 and be connected，Described interior pump barrel 40 includes the single pump barrel 41 being fixed on assembling ladder place, liquid valve seat 30 bottom、Pump barrel 43 little of the combination that feed liquor valve seat 60 centre bore fixes，And the single pump barrel 41 of connection、Combine the big pump barrel 42 of combination of little pump barrel 43，Described assembly for plunger 50 includes the single plunger 51 on top、The big plunger 52 of combination of movement in combining big pump barrel 42、And the combination small plunger 53 fixing with feed liquor valve seat 60 centre bore，Described liquid valve seat 30 lower surface、Single pump barrel 41 inwall、Single plunger 51 upper surface encloses formation epicoele 91，Described combination big pump barrel 42 inwall、Combine big plunger 52 lower surface、Combine little pump barrel 43 upper surface、Combination small plunger 53 outer wall encloses formation cavity of resorption 92，Described liquid valve seat 30 lower surface、Feed liquor valve seat 60 upper surface、Outer pump barrel 2 outer wall encloses formation exocoel 93，Described liquid valve seat 30 upper end is provided with the inner core liquid valve 31 that can block epicoele 91 and the urceolus liquid valve 32 that can block exocoel 93，Described feed liquor valve seat 60 upper surface is provided with urceolus liquid feed valve 61，Described single plunger 51 upper end is provided with the check (non-return) valve 54 that can block assembly for plunger 50 axially extending bore，The chamber of described connection valve bonnet 80 is provided with the inner core liquid feed valve 81 that can block bottom through-hole，The big pump barrel 42 of described combination is formed the liquid-through hole 44 that exocoel 93 connects with cavity of resorption 92，Described filtrate pipe 71 sidewall is formed filtrate hole.
Described combination big plunger 52 cross-sectional area is all higher than the cross-sectional area of single plunger 51, combination small plunger 53.
Described single plunger 51 cross-sectional area is the difference of the cross-sectional area combining big plunger 52, combination small plunger 53.
Described combination big pump barrel 42 internal diameter is all higher than single pump barrel 41, combines the internal diameter of little pump barrel 43.
Described liquid valve seat 30 axial cross section is T-shaped.
Described pump head 1 lower end is stepped, and the outer wall of described pump head 1 is concordant with outer pump barrel 2 outer wall.
The end difference of described filtrate pipe 71 lower end and bump joint 72 upper end fixes.
Described combination small plunger 53, the connected mode connected between valve bonnet 80 are threaded.
It is between described outer pump barrel 2 and liquid valve seat 30, feed liquor valve seat 60 and is tightly connected.
It is between described interior pump barrel 40 and liquid valve seat 30, feed liquor valve seat 60 and is tightly connected.
Described connection valve bonnet 80 is driven by prime mover (not shown).Connect valve bonnet 80 and drive assembly for plunger 50, up and down reciprocatingly run in interior pump barrel 40.
The work process of the present invention is as follows:
Enter under the oil well pump of invention, prime mover, oil pipe are connected in oil well, make epicoele 91, cavity of resorption 92, exocoel 93 be completely filled with well liquid.
When assembly for plunger 50 by prime mover driven up time, check (non-return) valve 54 and urceolus liquid valve 32 are closed, inner core liquid valve 31 is opened, well liquid in epicoele 91 is extruded by single plunger 51, passing sequentially through inner core liquid valve 31 and pump head 1 gives rise in oil pipe, meanwhile, urceolus liquid feed valve 61 is opened, be combined big plunger 52, combination small plunger 53 of well liquid in oil well casing aspirates, by urceolus liquid feed valve 61, exocoel 93, liquid-through hole 44 enters and full volume constantly expands cavity of resorption 92.
When assembly for plunger 50 is driven descending by prime mover by connecting valve bonnet 80, urceolus liquid feed valve 61 and inner core liquid valve 31 are closed, urceolus liquid valve 32 is opened, the well liquid of cavity of resorption 92 be combined big plunger 52, combination small plunger 53 extrude, give rise to oil pipe by liquid-through hole 44, exocoel 93, exocoel liquid valve 32 and pump head 1；Simultaneously inner core liquid feed valve 81, check (non-return) valve 54 are opened, the well liquid in oil well casing by connect valve bonnet 80, inner core liquid feed valve 81, assembly for plunger 50 endoporus be inhaled into and be full of, the constantly epicoele 91 of expansion.
Hereafter prime mover runs, and continuous reciprocating sliding assembly for plunger 50 repeats above-mentioned uplink and downlink process, and well liquid will continually, is given rise to ground by oil pipe.
The cross-sectional area making single plunger 51 in the present invention is slightly less than the difference that the cross-sectional area combining big plunger 52 deducts the cross-sectional area of combination small plunger 53, to single plunger 51, combine big plunger 52, combination small plunger 53 suitably mates, prime mover suffered resistance in push-and-pull process can be reached and reach the purpose of balance.
Two barrel structures of pump barrel 40 and outer pump barrel 2 in the present invention, an exocoel 93 is formed outside between pump barrel 2 and interior pump barrel 40, thus cavity of resorption liquid feed valve 61 and cavity of resorption liquid valve 32 can be made there to be enough installing spaces, it is not only easy to make, and can guarantee that reliability of operation, its advantage is especially notable to the double; two merit pump of small displacement.
The present invention adopts pump barrel to fix, the mode of plunger motion, the mode that in like manner, the present invention can also adopt pump barrel to move, plunger is fixing.Adopt pump barrel same in the present invention, piston structure or the pump barrel of simple deformation, piston structure all should belong to protection scope of the present invention.
The present invention achieves prime mover suffered resistance in push-and-pull process by interior pump barrel, the shape of assembly for plunger and annexation thereof and reaches the purpose of balance, exocoel between interior pump barrel, outer pump barrel is that cavity of resorption liquid feed valve, cavity of resorption liquid valve provide enough installations and safeguard space, ensure that reliability of operation, the present invention can effectively improve discharge opeing efficiency and energy-saving efficiency.
Claims (10)
- null1. the double; two merit oil well pump of two reciprocal balanced types，Including the pump head (1) connected with oil pipe，It is characterized in that: pump head (1) lower end is provided with outer pump barrel (2)，Outer pump barrel (2) is provided with liquid valve seat (30)、Feed liquor valve seat (60)，Described liquid valve seat (30)、Interior pump barrel (40) it is provided with between feed liquor valve seat (60)，Described outer pump barrel (2) free end inner radius is provided with filtrate pipe (71)，Described filtrate pipe (71) lower end is provided with bump joint (72)，The assembly for plunger (50) moved back and forth in interior pump barrel (40) sequentially passes through filtrate pipe (71)、Bump joint (72) afterwards be connected valve bonnet (80) be connected，Described interior pump barrel (40) includes the single pump barrel (41) being fixed on assembling ladder place, liquid valve seat (30) bottom、The little pump barrel of the combination (43) fixed with feed liquor valve seat (60) centre bore，And the single pump barrel (41) of connection、Combine the big pump barrel of the combination (42) of little pump barrel (43)，Described assembly for plunger (50) includes the single plunger (51) on top、The big plunger of the combination (52) of movement in combining big pump barrel (42)、And the combination small plunger (53) fixing with feed liquor valve seat (60) centre bore，Described liquid valve seat (30) lower surface、Single pump barrel (41) inwall、Single plunger (51) upper surface encloses formation epicoele (91)，Described combination big pump barrel (42) inwall、Combine big plunger (52) lower surface、Combine little pump barrel (43) upper surface、Combination small plunger (53) outer wall encloses formation cavity of resorption (92)，Described liquid valve seat (30) lower surface、Feed liquor valve seat (60) upper surface、Outer pump barrel (2) outer wall encloses formation exocoel (93)，Described liquid valve seat (30) upper end is provided with the inner core liquid valve (31) that can block epicoele (91) and the urceolus liquid valve (32) that can block exocoel (93)，Described feed liquor valve seat (60) upper surface is provided with urceolus liquid feed valve (61)，Described single plunger (51) upper end is provided with the check (non-return) valve (54) that can block assembly for plunger (50) axially extending bore，The chamber of described connection valve bonnet (80) is provided with the inner core liquid feed valve (81) that can block bottom through-hole，The big pump barrel of described combination (42) is formed the liquid-through hole (44) that exocoel (93) connects with cavity of resorption (92)，Described filtrate pipe (71) sidewall is formed filtrate hole.
- 2. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: described combination big plunger (52) cross-sectional area is all higher than the cross-sectional area of single plunger (51), combination small plunger (53).
- 3. the double; two merit oil well pump of two reciprocal balanced types according to claim 2, it is characterised in that: described single plunger (51) cross-sectional area should be slightly less than the difference of the cross-sectional area combining big plunger (52), combination small plunger (53).
- 4. the double; two merit oil well pump of two reciprocal balanced types according to claim 1 and 2, it is characterised in that: described combination big pump barrel (42) internal diameter is all higher than single pump barrel (41), combines the internal diameter of little pump barrel (43).
- 5. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: described liquid valve seat (30) axial cross section is T-shaped.
- 6. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: described pump head (1) lower end is stepped, and the outer wall of described pump head (1) is concordant with outer pump barrel (2) outer wall.
- 7. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: the end difference of described filtrate pipe (71) lower end and bump joint (72) upper end fixes.
- 8. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: described combination small plunger (53), the connected mode connected between valve bonnet (80) they are threaded.
- 9. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: it is between described outer pump barrel (2) and liquid valve seat (30), feed liquor valve seat (60) and is tightly connected.
- 10. the double; two merit oil well pump of two reciprocal balanced types according to claim 1, it is characterised in that: it is between described interior pump barrel (40) and liquid valve seat (30), feed liquor valve seat (60) and is tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273479.5A CN105736336B (en) | 2016-04-28 | 2016-04-28 | The double work(oil well pumps of two reciprocal balanced types |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273479.5A CN105736336B (en) | 2016-04-28 | 2016-04-28 | The double work(oil well pumps of two reciprocal balanced types |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105736336A true CN105736336A (en) | 2016-07-06 |
| CN105736336B CN105736336B (en) | 2017-09-12 |
Family
ID=56287580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610273479.5A Expired - Fee Related CN105736336B (en) | 2016-04-28 | 2016-04-28 | The double work(oil well pumps of two reciprocal balanced types |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105736336B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116117A (en) * | 1917-04-26 | 1918-05-27 | Hugh Slade Cairns | An Improved Pump for use in Petroleum Wells. |
| SU1737105A1 (en) * | 1990-05-11 | 1992-05-30 | Нефтегазодобывающее управление "Альметьевнефть" | Pressurizer for tubing |
| CN2903473Y (en) * | 2006-05-29 | 2007-05-23 | 大庆油田有限责任公司 | Reciprocating dual action oil-submersible electric pump |
| CN101672174A (en) * | 2009-10-14 | 2010-03-17 | 核工业理化工程研究院华核新技术开发公司 | Energy-saving uninterrupted non-rod oil pumping device |
| CN205592113U (en) * | 2016-04-28 | 2016-09-21 | 赵锡寰 | Two two merit oil -well pumps of reciprocal balanced type |
-
2016
- 2016-04-28 CN CN201610273479.5A patent/CN105736336B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116117A (en) * | 1917-04-26 | 1918-05-27 | Hugh Slade Cairns | An Improved Pump for use in Petroleum Wells. |
| SU1737105A1 (en) * | 1990-05-11 | 1992-05-30 | Нефтегазодобывающее управление "Альметьевнефть" | Pressurizer for tubing |
| CN2903473Y (en) * | 2006-05-29 | 2007-05-23 | 大庆油田有限责任公司 | Reciprocating dual action oil-submersible electric pump |
| CN101672174A (en) * | 2009-10-14 | 2010-03-17 | 核工业理化工程研究院华核新技术开发公司 | Energy-saving uninterrupted non-rod oil pumping device |
| CN205592113U (en) * | 2016-04-28 | 2016-09-21 | 赵锡寰 | Two two merit oil -well pumps of reciprocal balanced type |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105736336B (en) | 2017-09-12 |
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Granted publication date: 20170912 |