CN115354989B - Stackable long-strip-shaped underground supercharger - Google Patents
Stackable long-strip-shaped underground supercharger Download PDFInfo
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- CN115354989B CN115354989B CN202210987516.4A CN202210987516A CN115354989B CN 115354989 B CN115354989 B CN 115354989B CN 202210987516 A CN202210987516 A CN 202210987516A CN 115354989 B CN115354989 B CN 115354989B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 169
- 230000007704 transition Effects 0.000 claims abstract description 19
- 210000001503 joint Anatomy 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 4
- 238000003032 molecular docking Methods 0.000 claims description 4
- 239000008400 supply water Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to the technical field of hydraulic pressure, in particular to a stackable long-strip-shaped underground supercharger, which comprises a water inlet module, a supercharging module, a reversing module, a transition module and a water outlet module; the water inlet module is used for butting with the water supply end to supply water; the water inlet end of the pressurizing module is connected with the water outlet end of the water inlet module and is used for pressurizing operation; the water inlet end of the reversing module is connected with the water outlet end of the pressurizing module, and the water outlet end of the reversing module is connected with the water inlet end of the pressurizing module and is used for reversing operation; transition modules, etc. The strip-shaped hydraulic supercharger is characterized in that a plurality of reversing modules and supercharging modules can be overlapped at the middle part of the water inlet module and the water outlet module through the combination of the water inlet module, the supercharging module, the reversing module, the transition module and the water outlet module, so that a plurality of simultaneous supercharging is realized, and the output flow is increased; the modular arrangement facilitates the assembly of the device.
Description
Technical Field
The invention belongs to the technical field of hydraulic pressure, and particularly relates to a stackable long-strip-shaped underground supercharger.
Background
Oilfield flooding refers to injecting water of a desirable quality from a water injection well into an oil reservoir with a flooding device to maintain reservoir pressure. Oilfield flooding is one of the important means for supplementing energy to the formation and improving oilfield recovery in oilfield development. The level of the water injection well management technology determines the quality of the oil field development effect and also determines the length of the oil field development life.
After the oil field is put into development, the energy of the oil layer is continuously consumed along with the increase of the exploitation time, so that the pressure of the oil layer is continuously reduced, the underground crude oil is largely degassed, the viscosity is increased, the oil well yield is greatly reduced, even the blowout and the production stop are caused, and a large amount of dead oil remains in the underground and cannot be exploited. In order to compensate for the underground defect caused by crude oil extraction, maintain or increase the oil layer pressure, realize the high and stable yield of the oil field, obtain higher recovery ratio, the oil field must be injected with water.
The utility model discloses an oilfield pressurization water injection device, which comprises a mounting seat, a motor, a water injection pump and an air suction fan, wherein the left end and the right end of the mounting seat are respectively penetrated with a fixing rod, the upper end of a supporting block is penetrated with a control shaft, the control shaft is fixed below the mounting seat through the mounting block, the inner side of the supporting block is provided with a movable wheel arranged on the lower surface of the mounting seat, the upper surface of the mounting seat is provided with the motor, the right side of the motor is provided with the water injection pump, the outer covers of the motor and the water injection pump are provided with a protective cover fixedly connected with the mounting seat, the side wall of the protective cover is reserved with a ventilation opening, the outer side of the ventilation opening is provided with a dustproof net fixed on the protective cover, and the upper end of the protective cover is provided with the ventilation opening. This oil field pressure boost water injection device need not to advance when removing and fixed lifts, convenient operation, and can effectually cool off the inside of device, has guaranteed the life of device. The problem of poor internal cooling effect is mainly solved, and the device is not suitable for underground environments.
In the construction of underground rock breaking, underground water injection and the like of an oil field, underground supercharging is more advantageous than ground supercharging, but the size of a wellhead is small, so that the whole flow is small, and therefore, we propose a stackable underground supercharger.
Disclosure of Invention
The invention aims to solve the problems of difficult underground pressurization and insufficient flow of a supercharger.
In order to achieve the above purpose, the present invention provides the following technical solutions: a stackable long-strip-shaped underground supercharger comprises a water inlet module, a supercharging module, a reversing module, a transition module and a water outlet module;
the water inlet module is used for butting with the water supply end to supply water;
The water inlet end of the pressurizing module is connected with the water outlet end of the water inlet module and is used for pressurizing operation;
The water inlet end of the reversing module is connected with the water outlet end of the pressurizing module, and the water outlet end of the reversing module is connected with the water inlet end of the pressurizing module and is used for reversing operation;
The transition module is used for butting the water inlet end and the water outlet end of two adjacent pressurizing modules and is used for reversing connection of the pressurizing modules;
the water outlet module is connected with the water outlet end of the pressurizing module and is used for draining water;
Wherein, the pressure boost module with the switching-over module all is provided with a plurality of.
As a preferred embodiment of the present invention, the water inlet module includes a first housing, a first water inlet channel disposed in an inner cavity of the first housing, and a first water outlet valve disposed in the inner cavity of the first housing.
As a preferred embodiment of the invention, the pressurizing module comprises a second shell, a water inlet valve, a large piston, small pistons and a second water inlet channel, wherein the second shell is in butt joint with the first shell, the water inlet valve is symmetrically arranged in the second shell and communicated with the first water outlet valve, the large piston is arranged in an inner cavity of the second shell, the small pistons are symmetrically arranged at two sides of the inner cavity of the second shell and coaxially arranged with the large piston, the second water inlet channel is arranged at the lower side of the second shell and communicated with the first water inlet channel, the outer side end of the small piston is in butt joint with the water inlet valve, and communication grooves are formed at two sides of the large piston.
As a preferred embodiment of the present invention, the reversing module includes a third housing that is in butt joint with the second housing, second water outlet valves symmetrically disposed at both sides of the third housing, and a third water inlet channel disposed at the bottom of the third housing and communicating with the second water inlet channel.
As a preferred embodiment of the present invention, the third housing cavity is provided with a small valve core and a reversing valve core concentric with the small valve core.
As a preferred embodiment of the present invention, the transition module includes a fourth housing that is docked with the second docking module and a third water outlet valve that is symmetrically disposed in an inner cavity of the fourth housing.
As a preferred embodiment of the present invention, the water outlet module includes a fifth housing interfacing with the pressurizing module, a fourth water outlet valve disposed in the fifth housing and interfacing with a water outlet end of the pressurizing module, and a drain pipe disposed at a drain port of the fourth water outlet valve.
As a preferred embodiment of the present invention, the first outlet valve, the second outlet valve, the third outlet valve, the fourth outlet valve and the inlet valve are all one-way valves.
As a preferred embodiment of the invention, the first water outlet valve, the second water outlet valve, the third water outlet valve and the fourth water outlet valve are consistent in specification, the left side interface and the right side interface of the second shell are consistent in specification, and the first water outlet valve, the second water outlet valve, the third water outlet valve and the fourth water outlet valve are connected with the water inlet valve through connecting pipes with the same specification; the side cross-section profiles of the first shell, the second shell, the third shell, the fourth shell and the fifth shell are consistent.
The invention has the beneficial effects that: the long-strip-shaped hydraulic supercharger mainly comprises a water inlet module, a supercharging module, a reversing module, a transition module, a water outlet module and the like, wherein a plurality of reversing modules and supercharging modules can be overlapped at the middle parts of the water inlet module and the water outlet module, so that a plurality of simultaneous supercharging is realized, and the output flow is increased; the modular arrangement facilitates the assembly of the device.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the mounting structure of the present invention;
FIG. 2 is a schematic block diagram of the present invention;
FIG. 3 is a schematic diagram of the connection structure of the water inlet module, the pressurizing module and the reversing module of the invention;
FIG. 4 is a schematic diagram of the reversing module structure of the present invention;
FIG. 5 is a schematic illustration of the valve core structure of the reversing module of the present invention;
FIG. 6 is a schematic view of a transition module configuration of the present invention;
fig. 7 is a schematic view of the structure of the water outlet module of the present invention.
In the figure: 100. the water inlet module, 110, the first shell, 120, the first water inlet channel, 130, the first water outlet valve, 200, the pressurizing module, 210, the second shell, 220, the water inlet valve, 230, the large piston, 240, the small piston, 250, the second water inlet channel, 300, the reversing module, 310, the third shell, 311, the small valve core, 312, the reversing valve core, 320, the second water outlet valve, 330, the third water inlet channel, 400, the transition module, 410, the fourth shell, 420, the third water outlet valve, 500, the water outlet module, 510, the fifth shell, 520, the fourth water outlet valve, 530 and the drain pipe.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Example 1:
referring to fig. 1-2, the present invention provides a stackable elongated downhole booster, comprising a water inlet module 100, a booster module 200, a reversing module 300, a transition module, and a water outlet module 500;
A water inlet module 100 for supplying water in butt joint with a water supply end;
The water inlet end of the pressurizing module 200 is connected with the water outlet end of the water inlet module 100, and is used for pressurizing operation;
The water inlet end of the reversing module 300 is connected with the water outlet end of the pressurizing module 200, and the water outlet end of the reversing module 300 is connected with the water inlet end of the pressurizing module 200 for reversing operation;
the transition module 400 is used for butting the water inlet end and the water outlet end of two adjacent pressurizing modules 200 and is used for reversing connection of the pressurizing modules;
The water outlet module 500 is connected with the water outlet end of the pressurizing module 200 and is used for performing water drainage operation;
wherein, the pressurizing module 200 and the reversing module 300 are provided with a plurality of pressurizing modules;
In this embodiment, the elongated hydraulic supercharger mainly comprises a water inlet module 100, a supercharging module 200, a reversing module 300, a transition module, a water outlet module 500, etc., and the middle parts of the water inlet module 100 and the water outlet module 500 can be overlapped with a plurality of reversing modules 300 and supercharging modules 200, so as to realize a plurality of simultaneous supercharging and increase the output flow.
Example 2:
Referring to fig. 1-3, the water inlet module 100 includes a first housing 110, a first water inlet channel 120 disposed in an inner cavity of the first housing 110, and a first water outlet valve 130 disposed in the inner cavity of the first housing 110;
In this embodiment, the first water inlet 120 is connected to an external water source, the external water source directs water into the pressurizing module 200, and the water is discharged from the first water outlet valve 130 in the pressurizing module 200.
Example 2:
Referring to fig. 1-3, the pressurizing module 200 includes a second housing 210 abutted with the first housing 110, a water inlet valve 220 symmetrically disposed in the second housing 210 and communicated with the first water outlet valve 130, a large piston 230 disposed in an inner cavity of the second housing 210, small pistons 240 symmetrically disposed at two sides of the inner cavity of the second housing 210 and coaxially disposed with the large piston 230, and a second water inlet channel 250 disposed at a lower side of the second housing 210 and communicated with the first water inlet channel 120, wherein an outer side end of the small piston 240 is abutted with the water inlet valve 220, two sides of the large piston 230 are provided with communication grooves, a K feedback groove and a T feedback groove are disposed at a left side of a middle portion of the inner cavity of the second housing 210, and a P feedback groove communicated with the first water outlet valve 130 is disposed at a middle portion of the inner cavity of the second housing 210;
in the present embodiment, a K feedback slot and a T feedback slot above the large piston 230 are used for position feedback. When the large piston 230 moves to the upper position, the K feedback groove communicates with the T feedback groove, and when it moves to the far right, the K feedback groove communicates with the P feedback groove.
Example 3:
Referring to fig. 1-5, the reversing module 300 includes a third housing 310 that is in butt joint with the second housing 210, second water outlet valves 320 symmetrically disposed at two sides of the third housing 310, and a third water inlet channel 330 disposed at the bottom of the third housing 310 and in communication with the second water inlet channel 250.
Further, a small valve core 311 and a reversing valve core 312 coaxial with the small valve core 311 are arranged in the inner cavity of the third shell 310, a P feedback groove is formed in the left side of the position of the small valve core 311 of the third shell 310, a P feedback groove is formed in the middle of the position of the reversing valve core 312 of the third shell 310, T feedback grooves are symmetrically formed in the two sides of the middle of the reversing valve core 312 of the third shell 310, an A feedback groove is formed in the left side of the P feedback groove of the position of the reversing valve core 312, a B feedback groove is formed in the right side of the P feedback groove of the position of the reversing valve core 312, and a K feedback groove is formed in the position, in which the inner cavity of the third shell 310 contacts the right side of the reversing valve core 312;
in the embodiment, a small valve core 311 and a reversing valve core 312 are arranged in the reversing module 300, and the valve body is formed; the pressurizing module 200 moves to the left and right positions to change the pressure of the K port, so that the reversing valve core 312 is pushed to move left and right, and the large piston 230 inside the pressurizing module 200 is driven to move left and right, so that continuous pressurizing is realized.
Example 4:
referring to fig. 1-6, the transition module includes a fourth housing 410 that is docked with the second docking module, and a third water outlet valve 420 that is symmetrically disposed in an inner cavity of the fourth housing 410;
In this embodiment, when the transition module is installed, the transition module is docked with the pressurizing module 200 through the built-in two third water outlet valves 420, which is beneficial to increasing the number of pressurizing modules 200 of the device and facilitating installation and docking.
Example 5:
Referring to fig. 1-7, the water outlet module 500 includes a fifth housing 510 that is in butt joint with the pressurizing module 200, a fourth water outlet valve 520 that is disposed in the fifth housing 510 and is in butt joint with the water outlet end of the pressurizing module 200, and a drain pipe 530 that is disposed at the drain outlet of the fourth water outlet valve 520;
in the present embodiment, the pressurized water is discharged through the drain pipe 530 through the fourth water outlet valve 520 after the pressurization is completed.
Example 6:
Referring to fig. 1-7, further, the first outlet valve 130, the second outlet valve 320, the third outlet valve 420, the fourth outlet valve 520 and the inlet valve 220 are all one-way valves, which is beneficial to preventing backflow and optimizing the pressurizing effect.
Further, the specifications of the first outlet valve 130, the second outlet valve 320, the third outlet valve 420 and the fourth outlet valve 520 are consistent, the specifications of the left side interface and the right side interface of the second housing 210 are consistent, and the first outlet valve 130, the second outlet valve 320, the third outlet valve 420 and the fourth outlet valve 520 are connected with the inlet valve 220 through connecting pipes with the same specification; the first housing 110, the second housing 210, the third housing 310, the fourth housing 410 and the fifth housing 510 have consistent cross-sectional side profiles, which facilitates the combined butt-mounting of the devices.
Further, a small valve core 311 and a reversing valve core 312 coaxial with the small valve core 311 are arranged in the inner cavity of the third shell 310, a P feedback groove is formed in the left side of the position of the small valve core 311 of the third shell 310, a P feedback groove is formed in the middle of the position of the reversing valve core 312 of the third shell 310, T feedback grooves are symmetrically formed in two sides of the middle of the reversing valve core 312 of the third shell 310, an A feedback groove is formed in the left side of the P feedback groove of the position of the reversing valve core 312, and a K feedback groove is formed in the position, in contact with the right side of the reversing valve core 312, of the inner cavity of the third shell 310;
Wherein the P feedback groove is water inlet and water outlet feedback, and the T feedback groove is water discharge feedback.
Working principle: referring to fig. 2, when in use, firstly, the water inlet pipeline is externally connected, when passing through the pressurizing module 200, the piston in the pressurizing module 200 moves left and right to realize reciprocating hanging, then the pressurized water is led into the waterway through the reversing module 300, is injected into the pressurizing module 200 for pressurizing again, and finally discharges high-pressure water; the long-strip-shaped hydraulic supercharger mainly comprises a water inlet module 100, a supercharging module 200, a reversing module 300, a transition module, a water outlet module 500 and the like, wherein a plurality of reversing modules 300 and supercharging modules 200 can be overlapped at the middle part of the water inlet module 100 and the water outlet module 500 to realize a plurality of simultaneous supercharging and increase the output flow; the modular arrangement facilitates the assembly of the device.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. The stackable long-strip-shaped underground supercharger is characterized by comprising a water inlet module (100), a supercharging module (200), a reversing module (300), a transition module and a water outlet module (500);
a water inlet module (100) for supplying water in butt joint with the water supply end;
The water inlet end of the pressurizing module (200) is connected with the water outlet end of the water inlet module (100) and is used for pressurizing operation;
The reversing module (300), the water inlet end of the reversing module (300) is connected with the water outlet end of the pressurizing module (200), and the water outlet end of the reversing module (300) is connected with the water inlet end of the pressurizing module (200) for reversing operation;
the transition module (400) is used for butting the water inlet end and the water outlet end of two adjacent pressurizing modules (200) and is used for reversing connection of the pressurizing modules (200);
The water outlet module (500) is connected with the water outlet end of the pressurizing module (200) and is used for performing water drainage operation;
wherein the supercharging module (200) and the reversing module (300) are provided with a plurality of supercharging modules;
The water inlet module (100) comprises a first shell (110), a first water inlet channel (120) arranged in the inner cavity of the first shell (110) and a first water outlet valve (130) arranged in the inner cavity of the first shell (110);
The pressurizing module (200) comprises a second shell (210) in butt joint with the first shell (110), a water inlet valve (220) symmetrically arranged in the second shell (210) and communicated with the first water outlet valve (130), a large piston (230) arranged in the inner cavity of the second shell (210), small pistons (240) symmetrically arranged on two sides of the inner cavity of the second shell (210) and coaxially arranged with the large piston (230) and a second water inlet channel (250) arranged on the lower side of the second shell (210) and communicated with the first water inlet channel (120), wherein the outer side end of the small piston (240) is in butt joint with the water inlet valve (220), and communication grooves are formed on two sides of the large piston (230);
The reversing module (300) comprises a third shell (310) in butt joint with the second shell (210), second water outlet valves (320) symmetrically arranged on two sides of the third shell (310), and a third water inlet channel (330) arranged at the bottom of the third shell (310) and communicated with the second water inlet channel (250);
the inner cavity of the third shell (310) is provided with a small valve core (311) and a reversing valve core (312) coaxial with the small valve core (311).
2. The stackable elongated downhole booster of claim 1, wherein the transition module includes a fourth housing (410) interfacing with the second docking module and a third outlet valve (420) symmetrically disposed within an interior cavity of the fourth housing (410).
3. The stackable elongated downhole booster of claim 2, wherein the outlet module (500) includes a fifth housing (510) interfacing with the booster module (200), a fourth outlet valve (520) disposed in the fifth housing (510) and interfacing with the outlet end of the booster module (200), and a drain pipe (530) disposed at the drain port of the fourth outlet valve (520).
4. A stackable, elongated downhole booster according to claim 3, wherein the first outlet valve (130), the second outlet valve (320), the third outlet valve (420), the fourth outlet valve (520) and the inlet valve (220) are all one-way valves.
5. A stackable elongated downhole booster according to claim 3, wherein the first outlet valve (130), the second outlet valve (320), the third outlet valve (420) and the fourth outlet valve (520) are in the same specification, the left side interface and the right side interface of the second housing (210) are in the same specification, and the first outlet valve (130), the second outlet valve (320), the third outlet valve (420) and the fourth outlet valve (520) are connected with the inlet valve (220) by connecting pipes of the same specification; the first housing (110), the second housing (210), the third housing (310), the fourth housing (410) and the fifth housing (510) have consistent side cross-sectional profiles.
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CN202210987516.4A CN115354989B (en) | 2022-08-17 | 2022-08-17 | Stackable long-strip-shaped underground supercharger |
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CN202210987516.4A CN115354989B (en) | 2022-08-17 | 2022-08-17 | Stackable long-strip-shaped underground supercharger |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2282231A1 (en) * | 1999-03-30 | 2000-09-30 | Pradeep Dass | Modular downhole multiphase pump |
CN106968640A (en) * | 2017-03-15 | 2017-07-21 | 西南石油大学 | A kind of drainage underground gas production instrument |
CN108222890A (en) * | 2018-03-09 | 2018-06-29 | 中国石油大学(华东) | A kind of preset tubing string pneumatic type drainage gas production tool |
-
2022
- 2022-08-17 CN CN202210987516.4A patent/CN115354989B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2282231A1 (en) * | 1999-03-30 | 2000-09-30 | Pradeep Dass | Modular downhole multiphase pump |
CN106968640A (en) * | 2017-03-15 | 2017-07-21 | 西南石油大学 | A kind of drainage underground gas production instrument |
CN108222890A (en) * | 2018-03-09 | 2018-06-29 | 中国石油大学(华东) | A kind of preset tubing string pneumatic type drainage gas production tool |
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