CN110821802A - Force-increasing and pumping-assisting device and method for viscous oil inclined shaft - Google Patents
Force-increasing and pumping-assisting device and method for viscous oil inclined shaft Download PDFInfo
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- CN110821802A CN110821802A CN201810912846.0A CN201810912846A CN110821802A CN 110821802 A CN110821802 A CN 110821802A CN 201810912846 A CN201810912846 A CN 201810912846A CN 110821802 A CN110821802 A CN 110821802A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 239000003129 oil well Substances 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000011496 polyurethane foam Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims 2
- 239000003921 oil Substances 0.000 description 37
- 239000000295 fuel oil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a force-increasing pumping-assisting device and method for a thickened oil inclined shaft, wherein the device comprises an oil pipe, a hollow polished rod and a hollow sucker rod, the oil pipe is provided with a liquid outlet, the liquid outlet is connected with a liquid outlet pipeline, the hollow sucker rod is positioned in the oil pipe, the upper port of the hollow sucker rod is connected with the lower port of the hollow polished rod, the upper port of the hollow sucker rod is provided with a check valve, and the liquid outlet pipeline is connected with a pressure control valve. The outer wall of the pressure control valve is wrapped with a sound-insulation and shock-proof layer. The side wall of the lower part of the hollow sucker rod is provided with a radial through breathing hole which is communicated with the inner cavity of the oil pipe outwards. The lower end of the hollow sucker rod is connected with a plunger of an oil pump through a solid sucker rod. The upper end of the hollow polish rod is connected with the lower end of the gate, and the upper end of the valve is connected with a gas-liquid high-pressure hose. The invention solves the problem of limited production parameters of the oil well by increasing the downward force of the rod column, and achieves the purpose of increasing the yield of the oil well.
Description
Technical Field
The invention relates to the field of production of sucker-rod pump wells in oil fields, in particular to a force-increasing and pumping-assisting device and method for a thick oil inclined well.
Background
With the development of oil fields, the development of heavy oil reservoirs is gradually increased, and oil wells with large inclination are increased year by year under the limitation of ground environment and the requirement of sea oil land exploitation. Due to the high viscosity and the large flow resistance of the thick oil, the high friction resistance of a rod pipe of a high-gradient well building slope, the difficulty in descending a rod column in the lifting process of a conventional rod pump, the low pump efficiency, the difficulty in increasing the stroke frequency of the oil pumping unit and the influence on the yield of an oil well. Aiming at the problems, a descending thick oil pump and an inclined shaft pump are frequently adopted for lifting in the oil field, wherein the thick oil pump mainly utilizes hydraulic feedback to provide power for the descending of a rod column, is greatly influenced by the working fluid level and has limited improvement range on the descending power of the rod column; the inclined well pump has no downward feedback force, the problem that the rod column is easy to slowly fall still can not be solved when the well is inclined greatly, and the liquid is difficult to extract.
The pressure control valve is also called self-operated balance valve, flow control valve, flow controller, dynamic balance valve and flow balance valve, and is a visual and simple flow regulation control device, the flow regulation valve can be used in pipe network to directly set flow according to design, the valve can automatically eliminate residual pressure head of pipeline and flow deviation caused by pressure fluctuation under the action of water, the set flow is kept unchanged no matter how the system pressure changes, the functions of the valve can make pipe network flow regulation be completed at one time, the pipe network regulation work is changed into simple flow distribution, and the hydraulic imbalance of pipe network is effectively solved.
A pressure control valve refers to a valve for controlling and regulating the pressure of a fluid flow in a hydraulic system. Such valves operate on the principle that the fluid pressure and spring force acting on the spool are balanced. In a hydraulic transmission system, a hydraulic valve for controlling the pressure of oil is called a pressure control valve, and is called a pressure valve for short. Common to these types of valves is the principle of balancing the hydraulic and spring forces acting on the spool.
The pressure control valve has the functions of pressure regulation and pressure fixation in the system, works by utilizing the principle that control oil is balanced with a spring, the working state of the pressure control valve is directly influenced by the control pressure, and the state of the pressure control valve is changed. The structure of various pressure valves is clarified, and the working characteristics of the valves under different working conditions can be conveniently mastered.
In a particular hydraulic system, the requirements for pressure control are different according to the working requirements: there is a need to limit the maximum pressure of the hydraulic system, such as relief valves; some need to stabilize the pressure value (or pressure difference, pressure ratio, etc.) at a certain position in the hydraulic system, such as constant pressure valves like overflow valves, pressure reducing valves, etc.; and hydraulic pressure is used as a signal to control the action of the hydraulic control valve, such as a sequence valve, a pressure relay and the like.
Application No.: 201610070442.2, published 2018-07-13 discloses an oil well pump with constant downward force in a deviated well and a large displacement lifting method, wherein the oil well pump comprises an oil well pump body and a booster pump which are sequentially connected from top to bottom, the oil well pump body comprises an oil well pump barrel and an oil well plunger which is internally arranged in the oil well pump barrel, the booster pump comprises a booster pump barrel and a booster plunger arranged in the booster pump barrel, the bottom end of the oil pumping plunger is provided with a liquid discharge valve, the lower end of the boosting pump barrel is connected with a vacuum boosting valve through a joint, the upper end of the boosting plunger is connected with a liquid discharge valve through a flow guide joint, the vacuum booster valve is connected with a two-way joint, the upper end of the two-way joint is connected with an oil pump barrel through an outer pipe, the two-way joint is provided with an axial channel and a radial channel, wherein the axial channel is communicated with the inner cavity of the oil well pump barrel, and the radial channel is communicated with the bottom of the vacuum booster valve. The lower end of the two-way joint is connected with a liquid inlet valve, and the upper end of the liquid inlet valve is communicated with the axial channel. The economic and efficient lifting of the large-inclination oil well in the beach area is realized.
The above-mentioned publications also utilize a force-increasing mechanism in the inclined well, wherein the force-increasing pump itself is different from the force-increasing pumping-aid device of the present invention in technical solutions, technical effects, etc., and the technical characteristics do not have any technical inspiration.
Disclosure of Invention
The invention aims to provide a force-increasing and pumping-assisting device and method for a thick oil inclined shaft, which solve the problem that a sucker rod pump lifting rod column of the thick oil and inclined shaft is difficult to move downwards at present, solve the problem that the production parameters of the oil well are limited by increasing the downward force of the rod column and achieve the purpose of increasing the yield of the oil well.
In order to achieve the purpose, the invention adopts the following technical scheme that the force-increasing pumping-assisting device for the viscous oil inclined shaft comprises an oil pipe, a hollow polished rod and a hollow sucker rod, wherein a liquid outlet is formed in the oil pipe and is connected with a liquid outlet pipeline, the hollow sucker rod is positioned in the oil pipe, the upper port of the hollow sucker rod is connected with the lower port of the hollow polished rod, a check valve is arranged at the upper port of the hollow sucker rod, and a pressure control valve is connected to the liquid outlet pipeline.
The outer wall of the pressure control valve is wrapped with a sound-insulation and shock-proof layer.
The sound-proof and shock-proof layer is made of one of sound-proof cotton, wave cotton, polyurethane foam plastic and sound-proof damping felt.
The side wall of the lower part of the hollow sucker rod is provided with a radial through breathing hole which is communicated with the inner cavity of the oil pipe outwards.
The upper end of the hollow polish rod is connected with the lower end of the gate, and the upper end of the valve is connected with a gas-liquid high-pressure hose.
The upper end of the hollow polished rod is provided with the lower end of a valve, and the upper end of the valve is connected with a gas-liquid high-pressure hose.
In order to achieve the other purpose, the invention adopts the following technical scheme that a thickened oil inclined shaft boosting and pumping-assisting method is characterized in that a liquid outlet pipeline is provided with a pressure control valve, and when fluid in the liquid outlet pipeline reaches a set pressure, the pressure control valve is opened, and the liquid flows out; when the liquid pressure in the liquid outlet pipeline is reduced to a set value, the pressure control valve is closed; the pressure control valve is externally coated with a sound-insulation and shock-proof layer which can isolate impact sound generated by the valve ball and liquid when the valve ball is opened and closed; the pressure generated by the pressure control valve acts inside the hollow sucker rod and acts in the oil pipe, a downward force is generated at the top of the plunger of the oil well pump, and the downward power of the plunger of the oil well pump is increased;
high-pressure gas or liquid is filled into the hollow polished rod through the gas-liquid high-pressure hose, the pressure of the gas or the liquid is lower than the pressure set by the pressure control valve, at the moment, the high-pressure gas or the liquid acts on the check valve to generate downward force, the downward power of the hollow sucker rod is increased, and then the downward power of the plunger of the oil well pump is increased;
the two forces are favorable for lifting the rod column of the thick oil and the inclined shaft by the rod pump to move downwards, and the descending speed of the rod column of the well can be improved by increasing the descending power of the rod column, so that the production parameters of the oil well can be increased, the yield of the oil well can be increased, and the adaptability of the lifting mode of the rod pump in the thick oil well and the inclined shaft can be improved.
Compared with the prior art, the invention has the following beneficial effects:
1. a pressure control valve is added in a liquid outlet pipeline of the wellhead to improve the pressure of the wellhead, downward pressure is formed at the top of the plunger, and the downward power of the plunger is increased;
2. gas or liquid with certain pressure is injected into the hollow polished rod, downward pressure is formed at the bottom of the hollow polished rod, and the downward power of the rod column is increased;
3. the production parameters of the inclined shaft of the heavy oil well can be improved, the yield of the oil well can be increased, and the adaptability of the sucker rod pump lifting mode in the inclined shaft of the heavy oil well can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a force-increasing pumping-assisting device for a heavy oil inclined shaft of the present invention.
In the figure: the device comprises a gate 1, a gas-liquid high-pressure hose 2, a hollow polish rod 3, a check valve 4, a hollow sucker rod 5, an oil pipe 6, a breathing hole 7, a solid sucker rod 8, a liquid outlet pipeline 9, a pressure control valve 10 and a sound-insulation and shock-proof layer 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a viscous crude inclined shaft reinforcement helps takes out device, includes oil pipe 6, hollow polished rod 3, hollow sucker rod 5, oil pipe sets up the liquid outlet, the liquid outlet connects liquid pipeline 9, hollow sucker rod 5 is located the oil pipe, hollow sucker rod upper end mouth connects hollow polished rod 3 lower port to set up check valve 4 at hollow sucker rod upper end mouth, be connected with pressure control valve 10 on the liquid pipeline.
And the outer wall of the pressure control valve is wrapped with a sound-insulation and shock-proof layer 11.
The sound-proof and shock-proof layer is made of one of sound-proof cotton, wave cotton, polyurethane foam plastic and sound-proof damping felt.
The side wall of the lower part of the hollow sucker rod is provided with a radial through breathing hole 7 which is communicated with the inner cavity of the oil pipe outwards.
The lower end of the hollow sucker rod is connected with a plunger of an oil pump through a solid sucker rod 8.
The upper end of the hollow polish rod is connected with the lower end of the gate 1, and the upper end of the valve is connected with a gas-liquid high-pressure hose 2.
The hollow polished rod is connected with the upper end of the hollow sucker rod, and the lower end of the hollow sucker rod is connected with the solid sucker rod; the hollow polished rod, the hollow sucker rod and the solid sucker rod are sequentially connected and are arranged in the oil pipe, and a pneumatic valve is arranged at the top end of the hollow polished rod between the hollow polished rod and the oil pipe and is connected with a high-pressure hose; the top of the hollow sucker rod is provided with a check valve, and the top of the hollow sucker rod is provided with a breathing hole; the liquid outlet pipeline is communicated with the oil pipe, a pressure control valve is arranged on the liquid outlet pipeline, and a sound-proof and shock-proof layer is wrapped outside the pressure control valve.
A pressure control valve is arranged on the liquid outlet pipeline, and when the fluid in the liquid outlet pipeline reaches a certain pressure, the pressure control valve is opened, and the liquid flows out; when the liquid pressure in the liquid outlet pipeline is reduced to a set value, the pressure control valve is closed; the pressure control valve is externally coated with a sound-insulating and shock-proof layer for isolating impact sound generated by the valve ball and liquid when the valve ball is opened and closed.
The pressure generated by the pressure control valve acts inside the hollow sucker rod and acts in the oil pipe, a downward force is generated at the top of the plunger of the oil well pump, and the downward power of the plunger of the oil well pump is increased.
High-pressure gas or liquid is filled in the hollow polish rod through the gas-liquid high-pressure hose, the pressure is lower than the pressure set by the pressure control valve, at the moment, the high-pressure gas or liquid acts on the check valve to generate downward force, and the downward power of the rod column is increased.
The two forces are favorable for lifting the rod column of the thick oil and the inclined shaft by the rod pump to move downwards, and the descending speed of the rod column of the well can be improved by increasing the descending power of the rod column, so that the production parameters of the oil well can be increased, the yield of the oil well can be increased, and the adaptability of the lifting mode of the rod pump in the thick oil well and the inclined shaft can be improved.
The technology is mainly applied to the field of production of sucker-rod pump wells in oil fields. At present, the sucker-rod pump lifting mode for oil well production in the victory oil field is dominant, the number of thick oil wells and inclined wells is increased year by year, the viscosity of produced liquid of the thick oil wells is high, the friction resistance of rod pipes of the inclined wells is high, a rod column slowly descends, and the production parameters of the oil well cannot meet the production capacity requirement of the oil well. By adopting the technology, the downward force of the rod column can be increased, the production parameters of the viscous crude well inclined shaft oil well can be improved, and the application range of the rod pump lifting technology in the viscous crude well inclined shaft is expanded. Therefore, the force-increasing pumping-assisting device for the heavy oil inclined shaft has wide application prospect.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The reinforcing pumping-assisting device for the viscous oil inclined shaft comprises an oil pipe, a hollow polished rod and a hollow sucker rod, wherein a liquid outlet is formed in the oil pipe, and is connected with a liquid outlet pipeline.
2. The force-increasing and pumping-assisting device for the thick oil inclined shaft as claimed in claim 1, wherein the outer wall of the pressure control valve is wrapped with a sound-insulating and shock-proof layer.
3. The force-increasing and pumping-assisting device for the thick oil inclined shaft according to claim 1 or 2, wherein the sound-insulating and vibration-proof layer is made of one of sound-insulating cotton, wave cotton, polyurethane foam plastic and sound-insulating and damping felt.
4. The force-increasing and pumping-assisting device for the thick oil inclined shaft according to claim 1 or 2, wherein a radial through breathing hole is formed in the side wall of the lower part of the hollow sucker rod, and the breathing hole is communicated with the inner cavity of an oil pipe outwards.
5. The force-increasing and pumping-assisting device for the thick oil inclined shaft according to claim 1 or 2, wherein the lower end of the hollow sucker rod is connected with a plunger of an oil pump through a solid sucker rod.
6. The force-increasing and pumping-assisting device for the thick oil inclined shaft according to claim 1 or 2, wherein the upper end of the hollow polish rod is connected with the lower end of the gate, and the upper end of the valve is connected with a gas-liquid high-pressure hose.
7. A method for reinforcing and pumping a viscous oil inclined shaft is characterized in that a pressure control valve is arranged on a liquid outlet pipeline, and when fluid in the liquid outlet pipeline reaches a set pressure, the pressure control valve is opened, and the liquid flows out; when the liquid pressure in the liquid outlet pipeline is reduced to a set value, the pressure control valve is closed; the pressure control valve is externally coated with a sound-insulation and shock-proof layer which can isolate impact sound generated by the valve ball and liquid when the valve ball is opened and closed; the pressure generated by the pressure control valve acts inside the hollow sucker rod and acts in the oil pipe, a downward force is generated at the top of the plunger of the oil well pump, and the downward power of the plunger of the oil well pump is increased;
high-pressure gas or liquid is filled into the hollow polished rod through the gas-liquid high-pressure hose, the pressure of the gas or the liquid is lower than the pressure set by the pressure control valve, at the moment, the high-pressure gas or the liquid acts on the check valve to generate downward force, the downward power of the hollow sucker rod is increased, and then the downward power of the plunger of the oil well pump is increased;
the two forces are favorable for lifting the rod column of the thick oil and the inclined shaft by the rod pump to move downwards, and the descending speed of the rod column of the well can be improved by increasing the descending power of the rod column, so that the production parameters of the oil well can be increased, the yield of the oil well can be increased, and the adaptability of the lifting mode of the rod pump in the thick oil well and the inclined shaft can be improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912846.0A CN110821802A (en) | 2018-08-10 | 2018-08-10 | Force-increasing and pumping-assisting device and method for viscous oil inclined shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912846.0A CN110821802A (en) | 2018-08-10 | 2018-08-10 | Force-increasing and pumping-assisting device and method for viscous oil inclined shaft |
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| Publication Number | Publication Date |
|---|---|
| CN110821802A true CN110821802A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810912846.0A Pending CN110821802A (en) | 2018-08-10 | 2018-08-10 | Force-increasing and pumping-assisting device and method for viscous oil inclined shaft |
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| CN (1) | CN110821802A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431229A (en) * | 1994-01-13 | 1995-07-11 | Reaction Oilfield Products Ltd. | Method and apparatus for utilizing the pressure of a fluid column generated by a pump to assist in reciprocating the pump plunger |
| CN2771473Y (en) * | 2005-01-10 | 2006-04-12 | 宫日星 | Thick oil well hollow sucker rod steam-injection heating production device |
| CN202284465U (en) * | 2011-11-07 | 2012-06-27 | 中国石油化工股份有限公司 | Wellhead supercharging assistor |
| CN204552718U (en) * | 2015-04-16 | 2015-08-12 | 尹祖利 | Viscous crude mechanical oil well mixes viscosity reduction dilution device |
| CN205349639U (en) * | 2016-02-25 | 2016-06-29 | 中国石油化工股份有限公司 | Vacuum pressure boost helping hand oil -well pump |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
| CN208885488U (en) * | 2018-08-10 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of viscous crude inclined shaft reinforcement helps picking device |
-
2018
- 2018-08-10 CN CN201810912846.0A patent/CN110821802A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431229A (en) * | 1994-01-13 | 1995-07-11 | Reaction Oilfield Products Ltd. | Method and apparatus for utilizing the pressure of a fluid column generated by a pump to assist in reciprocating the pump plunger |
| CN2771473Y (en) * | 2005-01-10 | 2006-04-12 | 宫日星 | Thick oil well hollow sucker rod steam-injection heating production device |
| CN202284465U (en) * | 2011-11-07 | 2012-06-27 | 中国石油化工股份有限公司 | Wellhead supercharging assistor |
| CN204552718U (en) * | 2015-04-16 | 2015-08-12 | 尹祖利 | Viscous crude mechanical oil well mixes viscosity reduction dilution device |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
| CN205349639U (en) * | 2016-02-25 | 2016-06-29 | 中国石油化工股份有限公司 | Vacuum pressure boost helping hand oil -well pump |
| CN208885488U (en) * | 2018-08-10 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of viscous crude inclined shaft reinforcement helps picking device |
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