CN105736336B - The double work(oil well pumps of two reciprocal balanced types - Google Patents
The double work(oil well pumps of two reciprocal balanced types Download PDFInfo
- Publication number
- CN105736336B CN105736336B CN201610273479.5A CN201610273479A CN105736336B CN 105736336 B CN105736336 B CN 105736336B CN 201610273479 A CN201610273479 A CN 201610273479A CN 105736336 B CN105736336 B CN 105736336B
- Authority
- CN
- China
- Prior art keywords
- pump barrel
- plunger
- valve seat
- combination
- 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.)
- Expired - Fee Related
Links
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
-
- 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
-
- 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
-
- 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 kind of double work(oil well pumps of two reciprocal balanced types, including the pump head connected with oil pipe, pump head lower end is provided with outer pump barrel, liquid valve seat, feed liquor valve seat are provided with outer pump barrel, interior pump barrel is provided between the liquid valve seat, feed liquor valve seat, the outer pump barrel free end inner radius is provided with filtrate pipe, and the filtrate pipe lower end is provided with bump joint, the assembly for plunger moved back and forth in interior pump barrel sequentially pass through after filtrate pipe, bump joint be connected valve bonnet be connected.The present invention realizes the purpose that prime mover suffered resistance during push-and-pull reaches balance by interior pump barrel, the shape of assembly for plunger and its annexation, exocoel between interior pump barrel, outer pump barrel is cavity of resorption liquid feed valve, cavity of resorption liquid valve provides enough installations and safeguards space, reliability of operation is ensure that, the present invention can effectively improve discharge opeing efficiency and energy-saving efficiency.
Description
Technical field
The invention belongs to a kind of oil well pump, and in particular to a kind of double work(oil well pumps of two reciprocal balanced types.
Background technology
At present, reciprocating pair of work(oil well pump is the conventional production facilities in domestic and international oil field, the reciprocating pair of work(oil well pump it is excellent
Point is oil well pump to be driven by prime mover reciprocating sliding, and both direction has a lifting well liquid function, and the reciprocating pair of work(oil well pump lacks
Point is that the capacity variance of oil well pump both direction lifting well liquid is larger.
Reciprocating pair of work(oil well pump is analyzed from concrete structure, reciprocating pair of work(oil well pump is by two sets of various sizes of plungers
Constituted with pump barrel, one end piston size is larger, and cross section is larger, production liquid is more；The other end by same size larger piston
Combined with another size compared with valve piston, the difference of both cross sections is inevitable smaller, so as to cause production liquid less.So that driving is reciprocal
During prime mover of the double work(oil well pumps of formula is to its push-pull operation, suffered resistance is substantially uneven, is pumped for electronic submergence type
Pump assembly can have a strong impact on discharge opeing effect and energy-saving effect.
The content of the invention
The present invention proposes to solve the problem of prior art is present, double the purpose is to provide a kind of two reciprocal balanced types
Work(oil well pump.
The technical scheme is that：A kind of double work(oil well pumps of two reciprocal balanced types, including the pump head connected with oil pipe,
Pump head lower end, which is provided with outer pump barrel, outer pump barrel, is provided with liquid valve seat, feed liquor valve seat, liquid valve seat, feed liquor valve seat it
Between be provided with interior pump barrel, the outer pump barrel free end inner radius is provided with filtrate pipe, and the filtrate pipe lower end is provided with flange and connect
Head, the assembly for plunger moved back and forth in interior pump barrel sequentially pass through after filtrate pipe, bump joint be connected valve bonnet be connected, it is described in
Pump barrel includes being fixed on single pump barrel, the small pump of combination mutually fixed with feed liquor valve base center hole at liquid valve seat bottom assembling ladder
Cylinder, and the single pump barrel of connection, the big pump barrel of combination of the small pump barrel of combination, the assembly for plunger include the single plunger on top, in combination
The big plunger of combination, the combination small plunger of the big plunger lower end formation of combination, the liquid valve seat lower surface, list moved in big pump barrel
Pump barrel inwall, single plunger upper surface enclose to form epicoele, and the big pump barrel inwall of combination, the big plunger lower surface of combination, combination are small
Pump barrel upper surface, combination small plunger outer wall enclose to form cavity of resorption, the liquid valve seat lower surface, feed liquor valve seat upper surface, outer pump
Cylinder inwall encloses to form exocoel, and the liquid valve seat upper end is provided with and can block the inner cylinder liquid valve of epicoele and can block exocoel
Outer barrel liquid valve, the feed liquor valve seat upper surface is provided with outer barrel liquid feed valve, and the single plunger upper end, which is provided with, can block plunger
The inner cylinder liquid feed valve of bottom through-hole, institute can be blocked by being provided with the check (non-return) valve of assembly axially extending bore, the chamber of the connection valve bonnet
State to combine and the liquid-through hole that exocoel is connected with cavity of resorption is formed in big pump barrel, filtrate hole is formed in the wall of the filtrate pipe side.
The big plunger cross-sectional area of combination is all higher than single plunger, combines the cross-sectional area of small plunger.
The single plunger cross-sectional area, which should be slightly less than, combines big plunger, the difference of the cross-sectional area of combination small plunger.
The big pump barrel internal diameter of combination is all higher than single pump barrel, the internal diameter of the small pump barrel of combination.
The liquid valve seat axial cross section is T-shaped.
The pump head lower end is stepped, and the outer wall of the pump head is concordant with outer pump barrel outer wall.
The end difference of the filtrate pipe lower end and bump joint upper end is mutually fixed.
Connected mode between the combination small plunger, connection valve bonnet is threaded connection.
It is to be tightly connected between outer pump barrel and the liquid valve seat, feed liquor valve seat.
It is to be tightly connected between interior pump barrel and the liquid valve seat, feed liquor valve seat.
The present invention realizes prime mover institute during push-and-pull by interior pump barrel, the shape of assembly for plunger and its annexation
The purpose of balance is reached by resistance, the exocoel between interior pump barrel, outer pump barrel is cavity of resorption liquid feed valve, cavity of resorption liquid valve is provided enough
Installation safeguard space, it is ensured that reliability of operation, the present invention can effectively improve discharge opeing efficiency and energy-saving efficiency.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Wherein：
The outer pump barrel of 1 pump head 2
30 liquid valves, 31 inner cylinder liquid valves of seat
Pump barrel in 32 outer barrel liquid valves 40
41 single pump barrels 42 combine big pump barrel
The 43 small liquid-through holes of pump barrel 44 of combination
The single plunger of 50 assembly for plunger 51
The big combination of plunger 53 small plunger of 52 combinations
The feed liquor valve seat of 54 check (non-return) valve 60
The filtrate pipe of 61 outer barrel liquid feed valve 71
72 bump joints 80 connect valve bonnet
The epicoele of 81 inner cylinder liquid feed valve 91
The exocoel of 92 cavity of resorption 93.
Embodiment
Hereinafter, referring to the drawings and embodiment the present invention is described in detail：
As shown in figure 1, a kind of two reciprocal balanced types pair work(oil well pumps, including the pump head 1 connected with oil pipe, under pump head 1
End, which is provided with outer pump barrel 2, outer pump barrel 2, is provided with liquid valve seat 30, feed liquor valve seat 60, the liquid valve seat 30, feed liquor valve seat
Interior pump barrel 40 is provided between 60, the outer free end inner radius of pump barrel 2 is provided with filtrate pipe 71, and the lower end of filtrate pipe 71 is set
Bump joint 72 is equipped with, the assembly for plunger 50 moved back and forth in interior pump barrel 40 is sequentially passed through after filtrate pipe 71, bump joint 72
Be connected valve bonnet 80 be connected, the interior pump barrel 40 include be fixed on liquid valve seat 30 bottoms assembling ladder at single pump barrel 41, with
The small pump barrel 43 of combination that the centre bore of feed liquor valve seat 60 is mutually fixed, and the single pump barrel 41 of connection, the big pump of combination of the small pump barrel 43 of combination
Cylinder 42, single plunger 51 of the assembly for plunger 50 including top, the big plunger 52 of combination moved in big pump barrel 42 is combined, combination
The combination small plunger 53 that the big lower end of plunger 52 is formed, 30 lower surfaces of liquid valve seat, single inwall of pump barrel 41, the upper end of single plunger 51
Face encloses to form epicoele 91, the big inwall of pump barrel 42 of the combination, combine the big lower surface of plunger 52, combine the small upper surface of pump barrel 43,
The combination outer wall of small plunger 53 encloses to form cavity of resorption 92,30 lower surfaces of liquid valve seat, the upper surface of feed liquor valve seat 60, outer pump barrel 2
Inwall encloses to form exocoel 93, and 30 upper ends of liquid valve seat are provided with and can block the inner cylinder liquid valve 31 of epicoele 91 and can block
The outer barrel liquid valve 32 of exocoel 93, the upper surface of feed liquor valve seat 60 is provided with outer barrel liquid feed valve 61, the upper end of single plunger 51
The check (non-return) valve 54 of the axially extending bore of assembly for plunger 50 can be blocked by being provided with, and bottom can be blocked by being provided with the chamber of the connection valve bonnet 80
The liquid-through hole 44 that exocoel 93 is connected with cavity of resorption 92 is formed in the inner cylinder liquid feed valve 81 of portion's through hole, the big pump barrel 42 of combination, it is described
Filtrate hole is formed in the side wall of filtrate pipe 71.
The big cross-sectional area of plunger 52 of combination is all higher than single plunger 51, combines the cross-sectional area of small plunger 53.
The cross-sectional area of single plunger 51 is the big plunger 52 of combination, the difference for the cross-sectional area for combining small plunger 53.
The big internal diameter of pump barrel 42 of combination is all higher than single pump barrel 41, the internal diameter of the small pump barrel 43 of combination.
Liquid valve 30 axial cross sections of seat are T-shaped.
The lower end of pump head 1 is stepped, and the outer wall of the pump head 1 is concordant with the outer outer wall of pump barrel 2.
The end difference of the lower end of filtrate pipe 71 and the upper end of bump joint 72 is mutually fixed.
Connected mode between the combination small plunger 53, connection valve bonnet 80 is threaded connection.
It is to be tightly connected between outer pump barrel 2 and the liquid valve seat 30, feed liquor valve seat 60.
It is to be tightly connected between interior pump barrel 40 and the liquid valve seat 30, feed liquor valve seat 60.
The connection valve bonnet 80 is by prime mover driving (not shown).Connect valve bonnet 80 and drive assembly for plunger 50, in interior pump barrel
Up and down reciprocatingly run in 40.
The course of work of the present invention is as follows：
The oil well pump, prime mover, oil pipe of invention are connected in tripping in oil well, make epicoele 91, cavity of resorption 92, exocoel 93 all
Full of well liquid.
When assembly for plunger 50 is up by prime mover driven, check (non-return) valve 54 and outer barrel liquid valve 32 are closed, inner cylinder liquid valve
31 are opened, and the well liquid in epicoele 91 is extruded by single plunger 51, passes sequentially through inner cylinder liquid valve 31 and pump head 1 is given rise in oil pipe,
Meanwhile, outer barrel liquid feed valve 61 is opened, the well liquid in oil well casing be combined big plunger 52, combination small plunger 53 aspirate, by outer
In the cavity of resorption 92 that cylinder liquid feed valve 61, exocoel 93, liquid-through hole 44 enter and constantly expanded full of volume.
When assembly for plunger 50 drives descending by prime mover by connecting valve bonnet 80, outer barrel liquid feed valve 61 and inner cylinder liquid valve
31 are closed, and outer barrel liquid valve 32 opens, and be combined big plunger 52, combination small plunger 53 of the well liquid of cavity of resorption 92 is extruded, and passes through logical liquid
Hole 44, exocoel 93, exocoel liquid valve 32 and pump head 1 give rise to oil pipe；Inner cylinder liquid feed valve 81, check (non-return) valve 54 are opened simultaneously, oil well
Well liquid in sleeve pipe by connect valve bonnet 80, inner cylinder liquid feed valve 81, assembly for plunger 50 endoporus be inhaled into and be full of, constantly expand
Epicoele 91.
Hereafter prime mover is run, and continuous reciprocating sliding assembly for plunger 50 repeats above-mentioned uplink and downlink process, and well liquid will in a steady stream not
It is disconnected, ground is given rise to by oil pipe.
It is slightly less than the cross-sectional area of single plunger 51 in the present invention to combine the cross-sectional area of big plunger 52 and subtract combination pillar
The difference of the cross-sectional area of plug 53, to single plunger 51, combines big plunger 52, the suitably matching of combination small plunger 53, you can reach original
Motivation suffered resistance during push-and-pull reaches the purpose of balance.
Two barrel structures of pump barrel 40 and outer pump barrel 2 in the present invention, are formed outside one between outer pump barrel 2 and interior pump barrel 40
Chamber 93, so as to make cavity of resorption liquid feed valve 61 and cavity of resorption liquid valve 32 have enough installing spaces, is not only easy to make, and can guarantee that
Reliability of operation, its advantage is especially notable to the double work(pumps of small displacement.
The present invention is fixed using pump barrel, by the way of plunger motion, and similarly, the present invention can also be moved using pump barrel, plunger
Fixed mode.It all should be belonged to using the pump barrel of pump barrel same in the present invention, piston structure or simple deformation, piston structure
Protection scope of the present invention.
The present invention realizes prime mover institute during push-and-pull by interior pump barrel, the shape of assembly for plunger and its annexation
The purpose of balance is reached by resistance, the exocoel between interior pump barrel, outer pump barrel is cavity of resorption liquid feed valve, cavity of resorption liquid valve is provided enough
Installation safeguard space, it is ensured that reliability of operation, the present invention can effectively improve discharge opeing efficiency and energy-saving efficiency.
Claims (8)
1. a kind of double work(oil well pumps of two reciprocal balanced types, including the pump head connected with oil pipe（1）, it is characterised in that：Pump head（1）
Lower end is provided with outer pump barrel（2）, outer pump barrel（2）In be provided with liquid valve seat（30）, feed liquor valve seat（60）, the liquid valve seat
（30）, feed liquor valve seat（60）Between be provided with interior pump barrel（40）, the outer pump barrel（2）Free end inner radius is provided with filtrate pipe
（71）, the filtrate pipe（71）Lower end is provided with bump joint（72）, in interior pump barrel（40）In the assembly for plunger that moves back and forth
（50）Sequentially pass through filtrate pipe（71）, bump joint（72）Afterwards with being connected valve bonnet（80）It is connected, the interior pump barrel（40）Including solid
It is scheduled on liquid valve seat（30）Single pump barrel at bottom assembling ladder（41）And feed liquor valve seat（60）The combination that centre bore is mutually fixed is small
Pump barrel（43）, and the single pump barrel of connection（41）, combine small pump barrel（43）The big pump barrel of combination（42）, the assembly for plunger（50）Bag
Include the single plunger on top（51）, combining big pump barrel（42）The big plunger of combination of middle movement（52）, combine big plunger（52）Lower end
The combination small plunger of formation（53）, the liquid valve seat（30）Lower surface, single pump barrel（41）Inwall, single plunger（51）Enclose upper surface
Conjunction forms epicoele（91）, the big pump barrel of combination（42）Inwall, the big plunger of combination（52）Lower surface, the small pump barrel of combination（43）Upper end
Face, combination small plunger（53）Outer wall encloses to form cavity of resorption（92）, the liquid valve seat（30）Lower surface, feed liquor valve seat（60）Upper end
Face, outer pump barrel（2）Inwall encloses to form exocoel（93）, the liquid valve seat（30）Upper end, which is provided with, can block epicoele（91）It is interior
Cylinder liquid valve（31）With can block exocoel（93）Outer barrel liquid valve（32）, the feed liquor valve seat（60）Upper surface is provided with outer barrel
Liquid feed valve（61）, the single plunger（51）Upper end, which is provided with, can block assembly for plunger（50）The check (non-return) valve of axially extending bore（54）, institute
State connection valve bonnet（80）Chamber in be provided with and can block the inner cylinder liquid feed valve of bottom through-hole（81）, the big pump barrel of combination（42）
Middle formation exocoel（93）With cavity of resorption（92）The liquid-through hole of connection（44）, the filtrate pipe（71）Filtrate hole is formed in the wall of side, is connected
Valve bonnet（80）Drive assembly for plunger（50）, in interior pump barrel（40）Inside up and down reciprocatingly run, the big plunger of combination（52）Cross section
Product is all higher than single plunger（51）, combination small plunger（53）Cross-sectional area, the single plunger（51）Cross-sectional area should be slightly less than group
Close big plunger（52）, combination small plunger（53）Cross-sectional area difference.
2. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The big pump barrel of combination
（42）Internal diameter is all higher than single pump barrel（41）, combine small pump barrel（43）Internal diameter.
3. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The liquid valve seat（30）
Axial cross section is T-shaped.
4. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The pump head（1）Lower end
It is stepped, the pump head（1）Outer wall and outer pump barrel（2）Outer wall is concordant.
5. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The filtrate pipe（71）Under
End and bump joint（72）The end difference of upper end is mutually fixed.
6. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The combination small plunger
（53）, connection valve bonnet（80）Between connected mode for threaded connection.
7. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The outer pump barrel（2）With
Liquid valve seat（30）, feed liquor valve seat（60）Between be to be tightly connected.
8. the double work(oil well pumps of two according to claim 1 reciprocal balanced types, it is characterised in that：The interior pump barrel（40）With
Liquid valve seat（30）, feed liquor valve seat（60）Between be to be 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 CN105736336A (en) | 2016-07-06 |
| CN105736336B true 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 |
|---|---|
| CN105736336A (en) | 2016-07-06 |
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