CN110318727A - Oil well hoisting system for gas-tight - Google Patents
Oil well hoisting system for gas-tight Download PDFInfo
- Publication number
- CN110318727A CN110318727A CN201810268734.6A CN201810268734A CN110318727A CN 110318727 A CN110318727 A CN 110318727A CN 201810268734 A CN201810268734 A CN 201810268734A CN 110318727 A CN110318727 A CN 110318727A
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- China
- Prior art keywords
- oil
- gas
- heavy ball
- pump
- pipe
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
Abstract
The invention discloses a kind of oil well hoisting systems for gas-tight, belong to oil recovery field.The oil well hoisting system for gas-tight includes: casing, oil pipe, and oil pipe is sheathed in casing；System further include: heavy ball pump, air trap device, the tail pipe being located in casing；The lower port of oil pipe is connected to the leakage fluid dram that heavy ball pumps, and is provided with gas lift valve；Air trap device is used to separate the crude oil and gas in oil jacket annulus, and is provided with import, exhaust outlet, the oil discharge outlet being connected to the inlet of heavy ball pump；The upper port of tail pipe is connect with air trap device, and lower port is closed.The present invention can effectively be separated the crude oil in oil jacket annulus with gas by air trap device, both it can effectively avoid gas to enter in heavy ball pump, pump inlet pressure can be improved, to improve pump coefficient of fullness, improve pump efficiency, the gas isolated can also be made to enter in oil pipe by gas lift valve, mixed with the crude oil in oil pipe, realization helps act and load shedding to act on.
Description
Technical field
The present invention relates to oil recovery field, in particular to a kind of oil well hoisting system for gas-tight.
Background technique
In to oil extraction process, if the energy of oil reservoir reduces, crude oil need to be given rise to from shaft bottom using hoisting system
Ground.Wherein, core equipment of the oil well pump as hoisting system, for by the crude oil pumping in pit shaft to ground.And work as oil jacket
When gas in annular space is entered in oil well pump with crude oil, the pump efficiency of oil well pump can be reduced, crude oil production is unfavorable for.Therefore,
It is necessary to provide a kind of oil well hoisting systems for gas-tight, enter in oil well pump to avoid the gas in oil jacket annulus.
The prior art provides a kind of oil well hoisting system for gas-tight, which includes: casing, oil pipe, gas-tight pumping
Oil pump；Oil pipe is sheathed in casing, and the leakage fluid dram of airlock-resistant oil pump is connected to the lower port of oil pipe, and is located at the inside of casing.
Wherein, airlock-resistant oil pump include: pump barrel, the sucker rod and plunger that can be slidably sheathed on above and below in pump barrel respectively；The top of plunger
Portion is connect with sucker rod, and upper and lower end is respectively arranged with the first oil outlet, the second oil outlet, the first oil outlet, the second oil outlet
Place is separately installed with upward-traveling valves, lower travelling valve；Pump barrel includes: the upper seating nipple being from top to bottom sequentially connected to, middle chamber under
Seating nipple, and the bottom of lower seating nipple is equipped with oil inlet, is equipped with fixed valve at oil inlet；It, can be with when plunger slides above and below
Upper seating nipple, lower seating nipple inner wall offset.In application, fixed valve is opened, upward-traveling valves, lower travelling valve when plunger uplink
It closes, the crude oil and gas in pit shaft enter in lower seating nipple.When plunger, which leaves lower seating nipple, enters middle chamber, middle chamber
It is connected to lower seating nipple, the gas in lower seating nipple rises, and enters to the top of middle chamber；When plunger downlink, fixed valve is closed
It closes, upward-traveling valves, lower travelling valve are opened, and crude oil enters in plunger, and flows into middle chamber from the second oil outlet.Work as plunger
Upper end when entering to middle chamber, middle chamber is connected to oil pipe, be there is the indoor gas of lumen at this time and is moved up, enters to oil pipe
It is interior, until down stroke terminates.
The inventor finds that the existing technology has at least the following problems:
Due to the limited volume of the middle chamber of airlock-resistant oil pump, cause the gas-tight effect of oil well hoisting system bad, it is unfavorable
In the pump efficiency for improving oil well pump.
Summary of the invention
The embodiment of the invention provides a kind of oil well hoisting systems for gas-tight, in order to can solve the above problem.Institute
It is as follows to state technical solution:
A kind of oil well hoisting system for gas-tight, comprising: casing, oil pipe, the oil pipe are sheathed in described sleeve pipe；
The system also includes: heavy ball pump, air trap device, the tail pipe being located in described sleeve pipe；
The lower port of the oil pipe is connected to the leakage fluid dram that the heavy ball pumps, and is provided with gas lift valve；
The air trap device is used to separate crude oil and gas in oil jacket annulus, and be provided with import, exhaust outlet, with it is described
The oil discharge outlet of the inlet connection of heavy ball pump；
The upper port of the tail pipe is connect with the air trap device, and lower port is closed.
In a kind of possible design, the air trap device is interior bell-type air trap device.
In a kind of possible design, the air trap device includes: outer tube, inner tube, metal strip；
The import, the exhaust outlet are provided on the outer tube, and the import is located at the top of the outer tube；
The outer tube sleeve is mounted in the outside of said inner tube, and lower port is closed, and is connect with the tail pipe；
The lower port of said inner tube is located in the outer tube, and upper port constitutes the oil discharge outlet, and outer described in hermetically passing
The upper port of pipe is connected to the inlet that the heavy ball pumps；
The metal strip is spirally distributed on the outer wall of said inner tube, and is located in the outer tube.
In a kind of possible design, the upper port of the outer tube is threadedly coupled with said inner tube；
The upper port of said inner tube is threadedly coupled with the inlet that the heavy ball pumps；
The lower port of the outer tube is threadedly coupled with the tail pipe.
In a kind of possible design, the metal strip is welded on the outer wall of said inner tube.
In a kind of possible design, sealing ring is provided between the upper port and said inner tube of the outer tube.
In a kind of possible design, the leakage fluid dram of the heavy ball pump is connect with the tubing round thread.
In a kind of possible design, the outer wall of the tail pipe lower end is in inverted cone-shaped structure.
In a kind of possible design, the system is suitable for oil-gas ratio and is greater than or equal to 200m3/m3Oil well.
Technical solution provided in an embodiment of the present invention has the benefit that
Oil well hoisting system provided in an embodiment of the present invention for gas-tight, can be effectively by oil jacket annulus by air trap device
Interior crude oil is separated with gas, and avoidable gas enters in heavy ball pump, to improve pump coefficient of fullness, improves pump efficiency；
By gas lift valve gas in casing can enter in oil pipe, and then mixed with crude oil, this had not only both made piston in heavy ball pump
Above head of liquid reduces, that is, reduces the discharge pressure of heavy ball pump, makes to pump interior liquid the pump housing is discharged in advance, enhances pump
Discharge ability, and can reduce the density of oily tube fluid mitigates the load of heavy ball pump, also reduce heavy ball pump sucker rod and
The elastic telescopic of oil pipe reduces loss of plunger stroke 1/3~2/3, improves pump efficiency 20%~30%, when being also prevented from oil well production set spray and
Casing wax deposition extends the service life of sucker rod, heavy ball pump, reduces the leakage of pump；In addition, by the way that tail is arranged in the bottom of air trap device
Pipe can reduce heavy ball and pump the amplitude to shake during the work time, and then can extend the service life of heavy ball pump, and can protect
The safety of card lifting work carries out.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of the oil well hoisting system provided in an embodiment of the present invention for gas-tight；
Fig. 2 is the structural schematic diagram of heavy ball pump provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of air trap device provided in an embodiment of the present invention.
Wherein, each label declaration in attached drawing is as follows:
1- casing；
2- oil pipe；
3- heavy ball pump；
301- pump barrel；
301a- fixed valve；
302- sucker rod；
303- plunger；
303a- upward-traveling valves；
303b- lower travelling valve
304- valve seat；
4- air trap device；
4a- import；
4b- exhaust outlet；
4c- oil discharge outlet；
401- outer tube；
402- inner tube；
403- metal strip；
404- sealing ring；
5- tail pipe；
6- gas lift valve.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
It should be noted that oil jacket annulus involved in the embodiment of the present invention refers to that the annular between oil pipe and casing is empty
Between.
The embodiment of the invention provides a kind of oil well hoisting systems for gas-tight, and as shown in Fig. 1, which includes:
Casing 1, oil pipe 2, oil pipe 2 are sheathed in casing 1；Further, system further include: the heavy ball pump being located in casing 1
3, air trap device 4, tail pipe 5；Gas lift valve 6 is provided on oil pipe 2, and the lower port of oil pipe 2 is connected to the leakage fluid dram of heavy ball pump 3；
Air trap device 4 is used to separate crude oil and gas in oil jacket annulus, and be provided on air trap device 4 import 4a, exhaust outlet 4b, with
The oil discharge outlet 4c of the inlet connection of heavy ball pump 3；The upper port of tail pipe 5 is connect with air trap device 4, and lower port is closed.
It should be noted that heavy ball pump 3 be oil well pump a seed type, for by the crude oil pumping in pit shaft to ground its
In pump barrel 301.
As shown in Fig. 2, heavy ball pump 3 can include: pump barrel 301 can be slidably sheathed in pump barrel 301 above and below respectively
Sucker rod 302 and plunger 303；The bottom of pump barrel 301 is provided with oil inlet, and fixed valve 301a is provided at oil inlet；Column
The roof of plug 303 is connect with sucker rod 302, and is provided with multiple oil holes out；The upper and lower end of plunger 303 is respectively arranged with
One oil outlet, the second oil inlet, the first oil outlet are provided with upward-traveling valves 303a by valve seat 304, set at the second oil inlet
It is equipped with lower travelling valve 303b；Upward-traveling valves 303a and lower travelling valve 303b is high-density balls, for example, may be configured as copper ball.
The course of work of above-mentioned heavy ball pump 3 are as follows: when 303 uplink of plunger, fixed valve 301a is opened, upward-traveling valves 303a,
Lower travelling valve 303b is closed, and the crude oil and gas in pit shaft enter in pump barrel 301, the sky conceded full of 303 uplink of plunger
Between.When 303 downlink of plunger, since the crude oil in pump barrel 301 is pressurized, pressure increases, and closes fixed valve 301a；In plunger
During 303 continue traveling downwardly, the pressure in pump barrel 301 continues to increase, when the pressure in pump barrel 301 is more than the pressure in oil pipe 2
When, upward-traveling valves 303a, lower travelling valve 303b are opened, and crude oil passes through plunger 303 and enters in oil pipe 2.
In addition, gas lift valve 6 is check valve, it can be by comparing the cracking pressure and ambient pressure of itself setting (for example, set
Pressure in pipe) size, to control itself Push And Release；And it works independently with sucker rod 302.Gas lift valve 6 can pass through purchase
The mode bought obtains, such as can be bought by Wuxi Ming Feng petrochemical industry Science and Technology Ltd..
The working principle of the oil well hoisting system provided in an embodiment of the present invention for gas-tight is given below and is described:
In application, first casing 1 and oil pipe 2 are arranged in the pit shaft of oil well.Gas and crude oil conduct when stratum output
When fluid-mixing is entered in the oil jacket annulus of pit shaft, which enters to air trap device 4 by the import 4a of air trap device 4
Inside carries out oil liquid separation.Crude oil after separation enters to the inside of heavy ball pump 3 through the oil discharge outlet 4c of air trap device 4, by heavy ball
3 pumping are pumped to ground；Meanwhile the gas after separation is expelled in oil jacket annulus through the exhaust outlet 4b of air trap device 4, and in oil jacket
It is constantly built up in annular space, increase the pressure of oil jacket annulus.
When the pressure of oil jacket annulus is higher than the cracking pressure of gas lift valve 6, the gas in oil jacket annulus passes through 6 note of gas lift valve
Enter to oil pipe 2, mixed with the crude oil in oil pipe 2, so that the density of fluid reduces in oil pipe 2, to reduce by 2 gas injection point of oil pipe
Head of liquid gradient more than (position that gas injects i.e. in oil pipe 2) realizes that gas takes liquid lifting；When the pressure of oil jacket annulus
Lower than gas lift valve 6 cracking pressure when, gas lift valve 6 is closed, and due to the check action of gas lift valve 6, fluid in oil pipe 2 cannot be into
Enter oil jacket annulus.So that formation gas energy is fully used in this way, but realize pressure in oil jacket annulus rationally from
Dynamic control, makes entire hoisting system be in homeostasis process, is conducive to safety operation.
In addition, inlet valve 3a and oil extraction can be improved since the inlet valve 3a and draining valve 3b of heavy ball pump 3 are high-density balls
The shutdown rate of valve 3b, and then the amount that gas enters in heavy ball pump 3 can be reduced.
Since tail pipe 5 has certain weight, downward power can be provided to heavy ball pump 3 by air trap device 4, can reduced
The amplitude that heavy ball pump 3 shakes during the work time, and then the service life of heavy ball pump 3 can be extended, ensure that lifting
The safety of work carries out.
Oil well hoisting system provided in an embodiment of the present invention for gas-tight, can be effectively by oil jacket ring by air trap device 4
Crude oil in sky is separated with gas, and avoidable gas enters in heavy ball pump 3, to improve pump coefficient of fullness, improves pump
Pumping efficiency；The gas in casing 1 can be made to enter in oil pipe 2 by gas lift valve 6, and then be mixed with crude oil, this had not only both made
The head of liquid of 302 or more piston reduces in heavy ball pump 3, that is, reduces the discharge pressure of heavy ball pump 3, make to pump interior liquid and arrange in advance
The pump housing out enhances the discharge ability of pump, and can reduce the density of fluid in oil pipe 2, mitigates the load of heavy ball pump 3,
The sucker rod 304 of reduction heavy ball pump 3 and the elastic telescopic of oil pipe 2, reduction loss of plunger stroke 1/3~2/3, raising pump efficiency 20%~
30%, set spray and 1 wax deposition of casing when being also prevented from oil well production extend the service life of sucker rod 304, heavy ball pump 3, reduce the leakage of pump
It loses；In addition, the width that heavy ball pump 3 shakes during the work time can be reduced by the way that tail pipe 5 is arranged in the bottom of air trap device 4
Degree, and then the service life of heavy ball pump 3 can be extended, ensure that the safety of lifting work carries out.
In order to improve the separating effect of crude oil and gas in oil jacket annulus, in the embodiment of the present invention, air trap device 4 is interior
Bell-type air trap device.
Further, under the premise of simple based on structure, as shown in Fig. 3, in the embodiment of the present invention, air trap device 4
It include: outer tube 401, inner tube 402, metal strip 403；Import 4a, exhaust outlet 4b are provided on outer tube 401, and import 4a is positioned at outer
The top of pipe 401；Outer tube 401 is sleeved on the outside of inner tube 402, and lower port is closed, and lower port is simultaneously connect with tail pipe 5；Inner tube
402 lower port is located in outer tube 401, and upper port constitutes oil discharge outlet 4c, the upper port of upper port and hermetically passing outer tube 401 with
The inlet connection of heavy ball pump 3；Metal strip 403 is spirally distributed on the outer wall of inner tube 402, and is located in outer tube 401.
By being as above arranged, when in the oil jacket annulus that the gas and crude oil of stratum output enter pit shaft as fluid-mixing
When, which is flowed into the annular space between outer tube 401 and inner tube 402 by the import 4a of outer tube 401, is relied on later
The gravity of itself moves downward.It, can be with outer tube 401, inner tube 402 and metal strip during the fluid-mixing moves downward
403 collide, and separate the crude oil in fluid-mixing with gas, exhaust outlet 4b of the gas after separation through outer tube 401
Flow into oil jacket annulus, and separate after crude oil entered in inner tube 402 through the lower port of inner tube 402, after through inner tube 402
It flows into heavy ball pump 3,3 pumping is pumped to ground by heavy ball.
Wherein, the upper port of above-mentioned outer tube 401 is threadedly coupled with inner tube 402, and specifically, the upper port of outer tube 401 is arranged
There is internal screw thread, inner tube 402 is provided with external screw thread compatible with the internal screw thread of 401 upper port of outer tube.By so set, being convenient for
The dismounting of outer tube 401.
The upper port of above-mentioned inner tube 402 is threadedly coupled with the inlet of heavy ball pump 3, and specifically, the upper port of inner tube 402 is set
External screw thread is set, internal screw thread compatible with the external screw thread of 402 upper port of inner tube is arranged in the inlet of heavy ball pump 3.By so setting
Setting, convenient for the dismounting of inner tube 402.
The lower port of above-mentioned outer tube 401 is threadedly coupled with tail pipe 5, and specifically, external screw thread, tail is arranged in the lower end of outer tube 401
Internal screw thread compatible with the external screw thread of 401 lower end of outer tube is arranged in 5 top of pipe, convenient for the dismounting of tail pipe 5.
In addition, metal strip 403 is welded on the outer wall of inner tube 402, convenient for the installation of metal strip 403.Wherein, the metal strip
403 can be 304 stainless steels, such metal strip 403 has the characteristics that pressure-resistant, corrosion-resistant.
In order to avoid the crude oil in fluid-mixing flows out to oil jacket annulus in the gap between inner tube 402 and outer tube 401
It is interior, it is unfavorable for the separation of crude oil and gas, therefore, as shown in Fig. 3, is provided between the upper port and inner tube 402 of outer tube 401
Sealing ring 404.
About the set-up mode of sealing ring 404, annular groove can be set on the inner wall of outer tube 401, sealing ring 404 is arranged
In the annular groove；Annular groove is set again or on the outer wall of inner tube 402, and sealing ring 404 is arranged in the annular groove.
The mode that stickup can be used in above-mentioned sealing ring 404 is arranged in the annular groove on 401 inner wall of outer tube or inner tube 402
In annular groove on outer wall.
For the ease of replacement heavy ball pump 3, in the embodiment of the present invention, the leakage fluid dram of heavy ball pump 3 is threadedly coupled with oil pipe 2.Its
In, external screw thread is arranged in the lower port of oil pipe 2, and the leakage fluid dram of heavy ball pump 3 is provided with compatible with the external screw thread of 2 lower port of oil pipe
Internal screw thread.
In addition, as shown in Fig. 1, the outer wall of 5 lower end of tail pipe is in inverted cone-shaped structure in the embodiment of the present invention, tail pipe can be reduced
5 uplink and downlink resistance is conducive to tail pipe 5 and moves above and below.
System provided in an embodiment of the present invention is suitable for oil-gas ratio and is greater than or equal to 200m3/m3Oil well, can reduce gas
Influence of the body to heavy ball pump 3, while gas energy can be made full use of, realize that gas takes liquid lifting, and casing may be implemented
The reasonable automatic control of the pressure of annular space.
All the above alternatives can form the alternative embodiment of the disclosure, herein no longer using any combination
It repeats one by one.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of oil well hoisting system for gas-tight, comprising: casing (1), oil pipe (2), the oil pipe (2) are sheathed on the set
It manages in (1)；
It is characterized in that, the system also includes: the heavy ball being located in described sleeve pipe (1) pumps (3), air trap device (4), tail
It manages (5)；
The leakage fluid dram that the lower port of the oil pipe (2) pumps (3) with the heavy ball is connected to, and is provided with gas lift valve (6)；
The air trap device (4) is used to separate the crude oil and gas in oil jacket annulus, and is provided with import (4a), exhaust outlet
(4b), the oil discharge outlet (4c) being connected to the inlet of heavy ball pump (3)；
The upper port of the tail pipe (5) is connect with the air trap device (4), and lower port is closed.
2. system according to claim 1, which is characterized in that the air trap device (4) is interior bell-type air trap device.
3. system according to claim 2, which is characterized in that the air trap device (4) includes: outer tube (401), inner tube
(402), metal strip (403)；
The import (4a), the exhaust outlet (4b) are provided on the outer tube (401), and the import (4a) is located at outside described
Manage the top of (401)；
The outer tube (401) is sleeved on the outside of said inner tube (402), and lower port is closed, and is connect with the tail pipe (5)；
The lower port of said inner tube (402) is located in the outer tube (401), and upper port constitutes the oil discharge outlet (4c), and seals
The inlet for pumping with the heavy ball (3) across the upper port of the outer tube (401) is connected to；
The metal strip (403) is spirally distributed on the outer wall of said inner tube (402), and is located in the outer tube (401).
4. system according to claim 3, which is characterized in that the upper port of the outer tube (401) and said inner tube (402)
It is threadedly coupled；
The inlet that the upper port of said inner tube (402) pumps (3) with the heavy ball is threadedly coupled；
The lower port of the outer tube (401) is threadedly coupled with the tail pipe (5).
5. system according to claim 3, which is characterized in that the metal strip (403) is welded on said inner tube (402)
On outer wall.
6. system according to claim 3, which is characterized in that the upper port of the outer tube (401) and said inner tube (402)
Between be provided with sealing ring (404).
7. system according to claim 1, which is characterized in that the leakage fluid dram and the oil pipe (2) spiral shell of the heavy ball pump (3)
Line connection.
8. system according to claim 1, which is characterized in that the outer wall of tail pipe (5) lower end is in inverted cone-shaped structure.
9. described in any item systems according to claim 1~8, which is characterized in that the system be suitable for oil-gas ratio be greater than or
Equal to 200m3/m3Oil well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268734.6A CN110318727A (en) | 2018-03-29 | 2018-03-29 | Oil well hoisting system for gas-tight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268734.6A CN110318727A (en) | 2018-03-29 | 2018-03-29 | Oil well hoisting system for gas-tight |
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| Publication Number | Publication Date |
|---|---|
| CN110318727A true CN110318727A (en) | 2019-10-11 |
Family
ID=68110543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810268734.6A Pending CN110318727A (en) | 2018-03-29 | 2018-03-29 | Oil well hoisting system for gas-tight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110318727A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520116A (en) * | 2020-03-31 | 2020-08-11 | 东营市朝阳石油科技有限公司 | Oil-gas lifting device and method for high oil-gas ratio oil field |
| CN111520115A (en) * | 2020-03-31 | 2020-08-11 | 东营市朝阳石油科技有限公司 | Zero-clearance oil-gas mixed pumping device and method |
| CN116927725A (en) * | 2023-09-15 | 2023-10-24 | 新疆坤隆石油装备有限公司 | Underground special oil pump oil extraction system with scale prevention and wax control functions |
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| CN106321036A (en) * | 2015-07-10 | 2017-01-11 | 中国石油天然气股份有限公司 | CO2 flooding high-gas-liquid-ratio oil well anti-gas anti-corrosion lifting process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111520116B (en) * | 2020-03-31 | 2023-01-10 | 东营市朝阳石油科技有限公司 | Oil-gas lifting device and method for high oil-gas ratio oil field |
| CN116927725A (en) * | 2023-09-15 | 2023-10-24 | 新疆坤隆石油装备有限公司 | Underground special oil pump oil extraction system with scale prevention and wax control functions |
| CN116927725B (en) * | 2023-09-15 | 2024-02-13 | 新疆坤隆石油装备有限公司 | Underground special oil pump oil extraction system with scale prevention and wax control functions |
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Application publication date: 20191011 |