CN106050198A - Comprehensive drainage and gas extraction system for low-pressure low-yield well - Google Patents
Comprehensive drainage and gas extraction system for low-pressure low-yield well Download PDFInfo
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- CN106050198A CN106050198A CN201610615994.7A CN201610615994A CN106050198A CN 106050198 A CN106050198 A CN 106050198A CN 201610615994 A CN201610615994 A CN 201610615994A CN 106050198 A CN106050198 A CN 106050198A
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- gas production
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- oil pipe
- gas
- gas extraction
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Classifications
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/18—Repressuring or vacuum methods
Abstract
The invention discloses a comprehensive drainage and gas extraction system for a low-pressure low-yield well and belongs to the technical field of natural gas extraction equipment design and manufacturing. By means of the comprehensive drainage and gas extraction system for the low-pressure low-yield well, drainage and gas extraction media can be effectively input to a liquid accumulation segment below the gas extraction surface, so that the drainage and gas extraction effects are effectively improved. The comprehensive drainage and gas extraction system comprises a gas extraction oil pipe capable of stretching into the shaft gas extraction surface and an oil sleeve connected to the outer side of the gas extraction oil pipe in a sleeving mode. The comprehensive drainage and gas extraction system further comprises a multifunctional conveying device and a packer, the multifunctional conveying device with the tail end capable of stretching into the position below the shaft gas extraction surface is arranged in the gas extraction oil pipe in a penetrating and sleeved mode, and the gas extraction oil pipe and the gap, formed in one end of the shaft gas extraction surface, of the oil sleeve are sealed through the packer; the drainage and gas extraction media used for clearing accumulated liquid below the shaft gas extraction surface of the low-pressure low-yield well are directly conveyed into the accumulated liquid below the gas extraction surface through the multifunctional conveying device in cooperation with the gas extraction oil pipe.
Description
Technical field
The present invention relates to a kind of comprehensive draining gas production system, especially relate to a kind of comprehensive draining for low-voltage and low-yield well
Gas production system, belongs to natural gas extraction equipment design and manufacturing technology field.
Background technology
The most most low production and low pressure gas wells are producing initial stage, especially middle and late stage, owing to often there being hydrocarbon in gas well
At the bottom of class condensed liquid or formation water access wall, when gas well yield is high, shaft bottom gas-liquid speed is big and the quantity of FIH is relatively fewer
Time, water will be carried to ground by air-flow completely.Along with the progress of recovery process, stratum energy weakens naturally, gas-liquid flow velocity also with
Reduction so that gas fluid-carrying capability is worse and worse, it is impossible to effectively by timely for shaft bottom liquid band to ground, cause pit shaft hydrops by
Cumulative many.Owing to the existence of hydrops will increase the back pressure to gas-bearing formation, and limit its production capacity, the most even can be complete by gas-bearing formation
Kill so that closing well so that produce and cannot be normally carried out, reduce gas well production efficiency, thus affect the economy of whole gas field development
Benefit.Thus, select effective water drainage-gas recovery technology method to be discharged by pit shaft hydrops in time, recover gas well and normally produce especially
For important.
At present, the most extensively application foam drainaging gas cutting process technology solves the low-voltage and low-yield well shaft of Gas Reservoirs
Hydrops, improves recovery ratio problem, but usual foam water discharge agent dosing method is mainly directly added by wellhead tree tree tubing and casing
Note, it is impossible to effectively reach pit shaft hydrops section, has a strong impact on drainage effect, is badly in need of exploring a kind of novel water pumping gas production mode and solves
The difficult problem certainly faced.
Summary of the invention
The technical problem to be solved is: provide one can effectively by water pumping gas production medium input gas production face with
Under hydrops section in, with the effective comprehensive draining gas production system for low-voltage and low-yield well improving water pumping gas production effect.
A kind of comprehensive draining gas production for low-voltage and low-yield well is the technical scheme is that by solving above-mentioned technical problem
System, including the gas production oil pipe that can stretch in pit shaft gas production face and the tubing and casing being socketed in outside this gas production oil pipe, described combines
Closing water pumping gas production system and also include multi-functional conveyer device and packer, end can stretch into the described many of below pit shaft gas production face
Function conveyer device is set in described gas production oil pipe, and described gas production oil pipe and described tubing and casing are positioned at one end, pit shaft gas production face
Gap by described packer sealing；For removing the water pumping gas production of the following hydrops in described low-voltage and low-yield well shaft gas production face
Medium, is directly inputted under the cooperation of described gas production oil pipe by described multi-functional conveyer device in the hydrops in below gas production face.
The invention has the beneficial effects as follows: the application is by arranging a set of multi-functional conveyer device and a packer, and makes
End can stretch into the described multi-functional conveyer device in below pit shaft gas production face and be set in described gas production oil pipe, then passes through
Described gas production oil pipe and described tubing and casing are positioned at the clearance seal of one end, pit shaft gas production face by described packer, to be formed
One gas production passage based on tubing and casing.So, for removing the row of the following hydrops in described low-voltage and low-yield well shaft gas production face
Hydromining gas medium, as described in the gases at high pressure of gaslift water pumping gas production, the foaming agent of foam drainage gas recovery all can pass through
Multi-functional conveyer device, directly arrives pit shaft hydrops section under the cooperation of described gas production oil pipe.When described water pumping gas production medium
After arriving pit shaft hydrops section, if water pumping gas production medium is the gases at high pressure that gaslift is arranged, it is deposited on below pit shaft gas production face
Hydrops just can lift lifting under elevated pressure conditions, disperse this hydrops so that it is become volume, water droplet that quality is the least, reach
The purpose of pit shaft is taken out of with the air-flow of exploitation；In like manner, if water pumping gas production medium is foaming agent, it is directly entered in hydrops
Foaming agent just can fuse with this hydrops, refine hydrops, reach to take out of with the air-flow of exploitation the purpose of pit shaft, Jin Erda
Water pumping gas production effect is improved to effective.
Further, described multi-functional conveyer device includes continuous little oil pipe, described comprehensive draining gas production system
Also include the production tree being arranged in described low-voltage and low-yield well well head and the high-pressure natural gas storage tank being connected with this production tree, described
Gas production oil pipe be connected with described production tree, described continuous little oil pipe is natural with described high pressure by described production tree
Gas storage tank connects.
Such scheme it is preferable that, described comprehensive draining gas production system also includes containing CNG tank car and booster pump
Compression system, described compression system is connected in parallel on described continuous by described production tree and described high-pressure natural gas storage tank
The input of little oil pipe.
Further, the end at described continuous little oil pipe there also is provided founding shower nozzle.
Further, described multi-functional conveyer device also includes the center oil being set in described continuous little oil pipe
Pipe, described comprehensive draining gas production system also includes bubble row's assembly, and described center oil pipe passes through described production tree with described
Bubble row assembly connect；During bubble row, the foaming agent being stored in described bubble row's assembly passes through described center oil pipe, in institute
State and under the cooperation of production tree, directly arrive pit shaft hydrops section.
Such scheme it is preferable that, described bubble row's assembly includes foaming agent tank, foaming dosing pump and bubble row's sled, institute
The foaming agent tank stated and described foaming dosing pump are installed on described bubble row's sled, and described center oil pipe is by described
Foaming dosing pump is connected with described foaming agent tank.
Further, described comprehensive draining gas production system also includes negative suction system, described negative pressure-pumping dress
Put and connected with described gas production oil pipe by described production tree.
Such scheme it is preferable that, described negative suction system includes multicylinder pump, ejector pump, sleeping tank and suction
Sled, described multicylinder pump, ejector pump and described sleeping tank is installed on described suction sled, and the entrance of described ejector pump is with many
Cylinder delivery side of pump is connected, and the negative pressure mouth of described ejector pump is connected with the speed control muffler of production tree.
Further, described comprehensive draining gas production system also includes that high-pressure gas-liquid sand separating apparatus and high-pressure gas-liquid divide
From device, described high-pressure gas-liquid sand separating apparatus and the gas being connected to production tree of described high-pressure gas-liquid segregation apparatus order
On body outfan.
Accompanying drawing explanation
Fig. 1 is the present invention structural representation for the comprehensive draining gas production system of low-voltage and low-yield well.
Figure is labeled as: gas production oil pipe 1, tubing and casing 2, multi-functional conveyer device 3, packer 4, continuous little oil pipe 5, low pressure
Stripper well well head 6, production tree 7, high-pressure natural gas storage tank 8, founding shower nozzle 9, center oil pipe 10, bubble row assembly 11, foaming agent tank
12, foam dosing pump 13, bubble row's sled 14, negative suction system 15, ejector pump 16, sleeping tank 17, suction sled 18, multicylinder pump 19, height
Calm the anger liquid sand separating apparatus 20, high-pressure gas-liquid segregation apparatus 21, booster pump 22, CNG tank car 23.
Detailed description of the invention
Be as shown in Figure 1 the present invention provide a kind of can effectively by water pumping gas production medium input gas production face below hydrops
In section, with the effective comprehensive draining gas production system for low-voltage and low-yield well improving water pumping gas production effect.Described comprehensive row
Hydromining gas system includes the gas production oil pipe 1 that can stretch in pit shaft gas production face and the tubing and casing 2 being socketed in outside this gas production oil pipe 1,
It is characterized in that: described comprehensive draining gas production system also includes multi-functional conveyer device 3 and packer 4, and end can stretch into
Described multi-functional conveyer device 3 below pit shaft gas production face is set in described gas production oil pipe 1, described gas production oil pipe 1 and institute
State tubing and casing 2 to be positioned at the gap of one end, pit shaft gas production face and sealed by described packer 4；For removing described low-voltage and low-yield well
The water pumping gas production medium of the following hydrops in pit shaft gas production face, by described multi-functional conveyer device 3 in the cooperation of described gas production oil pipe 1
Under directly input in the hydrops in below gas production face.The application by arranging a set of multi-functional conveyer device 3 and a packer 4,
And the described multi-functional conveyer device 3 making end can stretch into below pit shaft gas production face is set in described gas production oil pipe 1, so
By described packer 4, the clearance seal that described gas production oil pipe 1 and described tubing and casing 2 are positioned at one end, pit shaft gas production face is risen afterwards
Come, to form a gas production passage based on tubing and casing.So, it is used for removing below described low-voltage and low-yield well shaft gas production face
The water pumping gas production medium of hydrops, as the gases at high pressure of gaslift water pumping gas production, the foaming agent of foam drainage gas recovery all can lead to
Cross described multi-functional conveyer device 3, under the cooperation of described gas production oil pipe 1, directly arrive pit shaft hydrops section.As described row
After hydromining gas medium arrives pit shaft hydrops section, if water pumping gas production medium is the gases at high pressure that gaslift is arranged, it is deposited on pit shaft
Hydrops below gas production face just can be lifted lifting under elevated pressure conditions, disperse this hydrops so that it is become volume, quality the least
Water droplet, reaches to take out of the purpose of pit shaft with the air-flow of exploitation；In like manner, if water pumping gas production medium is foaming agent, directly
Enter the foaming agent in hydrops just to fuse with this hydrops, refine hydrops, reach to take pit shaft out of with the air-flow of exploitation
Purpose, and then reach effectively to improve water pumping gas production effect.
In above-mentioned embodiment, along with the progress of production gas technology, and the application of novel flow line, described in order to simplify
The structure of multi-functional conveyer device 3, convenient manufacture, installation and the existing pipeline of more employing, to avoid putting into new grinding
Sending out cost, multi-functional conveyer device 3 described herein includes that continuous little oil pipe 5, described comprehensive draining gas production system also wrap
Include the production tree 7 being arranged in described low-voltage and low-yield well well head 6 and the high-pressure natural gas storage tank 8 being connected with this production tree 7, described
Gas production oil pipe 1 be connected with described production tree 7, described continuous little oil pipe 5 is by described production tree 7 and described high pressure
Natural gas storage tank 8 connects；And in order to ensure stablizing of gases at high pressure air pressure for forming gaslift, the application institute to greatest extent
The comprehensive draining gas production system stated also includes containing CNG tank car (23) and the compression system of booster pump 22, described compression system
The input of described continuous little oil pipe 5 it is connected in parallel on by described production tree 7 and described high-pressure natural gas storage tank 8.So, when
When the pressure of the gas in described high-pressure natural gas storage tank 8 is enough, it is used directly for gaslift gas production, when described high-pressure natural gas
When the pressure reduction of the gas in storage tank 8 is not enough to effectively carry out gaslift gas production, can improve defeated by described booster pump
Enter the pressure of gas, it is ensured that effectively carrying out of gaslift gas production.And adapt with this, in order to the silt particle that will deposit is effectively with air-flow
Discharging, the application there also is provided founding shower nozzle 9 at the end of described continuous little oil pipe 5.So, gases at high pressure pass through described turning over
The injection of sand nozzle just can make sand grains rolling and the gas-liquid mixed in gas production face, by continuous little oil pipe and the space of gas production oil pipe
Take well head out of at a high speed.
Further, in order to when using bubble row, described foaming agent can effectively directly input the gas production face of pit shaft
In following hydrops, described multi-functional conveyer device 3 also includes the center oil pipe 10 being set in described continuous little oil pipe 5,
Described comprehensive draining gas production system also includes bubble row's assembly 11, and described center oil pipe 10 is by described production tree 7 and institute
The bubble row's assembly 11 stated connects；During bubble row, it is stored in the foaming agent in described bubble row's assembly 11 by described center oil
Pipe 10, directly arrives pit shaft hydrops section under the cooperation of described production tree 7.The preferred structure of the most described bubble row's assembly 11 is,
Described bubble row's assembly 11 includes foaming agent tank, 12 foaming dosing pumps 13 and bubble row's sled 14, described foaming agent tank 12 and described
Foaming dosing pump 13 be installed on described bubble row's sled 14, described center oil pipe 10 by described foaming dosing pump and
Foaming agent tank 12 described in 13 connects.So, the foaming agent that just can will be stored in foaming agent tank 12 by foaming dosing pump 13,
Directly input under the cooperation of described production tree 7 and center oil pipe 10 in the hydrops in below pit shaft gas production face, then amass described
In liquid formed can with air-flow take out of the gas of pit shaft, bubble, liquid mixing with air-flow discharge pit shaft, reach bubble row purpose.
Meanwhile, in order to form comprehensive drainage gas recovery, to discharge the long-pending of below the gas production face of pit shaft to greatest extent
Liquid, comprehensive draining gas production system described herein also includes that negative suction system 15, described negative suction system 15 pass through
Described production tree 7 connects with described gas production oil pipe 1.Now, described negative suction system 15 includes multicylinder pump (19), spray
Penetrating pump 16, sleeping tank 17 and suction sled 18, described multicylinder pump (19), ejector pump 16 and described sleeping tank 17 are installed in described
On suction sled 18, the entrance of described ejector pump 16 is connected with the outlet of multicylinder pump 19, the outlet of ejector pump 16 and high-pressure gas-liquid sand
Segregation apparatus 20 is connected, and the negative pressure mouth of ejector pump 16 is connected with the speed control muffler of production tree.So, taken out by described negative pressure
Inhale device 15 and just can form subnormal ambient at the gas production face place of gas production oil pipe 1, make the together sucking-off of the gas in shaft bottom, sand, liquid, and with
The liquid mixing of ejector pump, together discharges through pipeline.
Further, in order to improve the quality of output gas, described comprehensive draining gas production system also includes high-pressure gas-liquid
Sand separating apparatus 20 and high-pressure gas-liquid segregation apparatus 21, described high-pressure gas-liquid sand separating apparatus 20 and described high-pressure gas-liquid divide
On the gas output end being connected to production tree 7 of device 21 order.So, the gas of extraction fills through high-pressure gas-liquid sand separation
Put 20 and high-pressure gas-liquid segregation apparatus 21 order respectively separate sand grains therein and moisture content, thus ensure that output gas
Quality.
The operation principle of Combined Mining heat-extraction system described herein is as follows:
1, gaslift water pumping gas production: in gas production oil pipe 1, increases gas production face, a continuous little oil pipe 5 straight cutting shaft bottom.With packing
Tubing and casing 2 and gas production oil pipe 1 are insulated by device 4.The other end of little oil pipe 5 is connected with gaslift sled and a booster pump 22 continuously.When
When the gas pressure of gaslift sled meets gaslift pressure, the natural gas in tank can be directly utilized by continuous little oil pipe 5 to well
The end, carries out gaslift.As the natural gas in tank be unsatisfactory for gaslift require time, can by booster pump 22 pressurize after, by continuous little oil
Pipe 5 carries out gaslift to shaft bottom.A natural gas air accumulator, when normally producing, well head also it is parallel with in the front portion of booster pump 22
The laggard circulation of qi promoting of pressurization of the intensified pump of the gas in air accumulator can be used during the certain natural gas of output to lift.
2, foam drainage gas recovery: center oil pipe 10 straight cutting shaft bottom, foaming agent is arranged by a definite proportion by than row pump, from dosing nozzle
Enter in the center oil pipe 10 in continuous little oil pipe 5 and input gas production face, mixing generation foam with the gas and water of down-hole.Reduce oil
Fluid column proportion between sleeve pipe and continuously little oil pipe, it is achieved foam drainage gas recovery.
3, placer: in continuous little oil pipe front end equipped with founding shower nozzle.During gaslift, gas produces injection through nozzle, makes gas production face
Sand grains rolling and gas-liquid mixed, continuous little oil pipe and gas production oil pipe space take well head out of at a high speed.
4, negative pressure-pumping water pumping gas production: the liquid of sleeping tank, under the effect of multicylinder pump, at a high speed by ejector pump, at this moment sprays
Pump intake produces a negative pressure.When opening wellhead tree tree valve, wellhead tree pipe and ejector pump suction inlet UNICOM.Negative
By the together sucking-off of the gas in shaft bottom, sand, liquid under pressure effect, and with the liquid mixing of ejector pump, together discharge through pipeline.
The advantage of the application is: is gone directly shaft bottom hydrops section by ground corollary equipment and continuous little oil pipe, utilizes ground
Equipment i.e. steeps row's assembly and foaming water discharge agent injects hydrops intrasegmental part, makes foaming water discharge agent exist under the effect of borehole fluid stirring
Pit shaft produces foam, reduces fluid density, reduce the slippage loss of surface tension of liquid and gas, improve gas and take liquid energy
Power, applies the composite technology such as gaslift, negative pressure-pumping simultaneously, thus effectively reduces pit shaft hydrops and improve gas well gas production.Can be effective
The shaft bottom hydrops problem of solution relatively polymorphic type water-producing gas well, meet gas field development process specifications, form gas field development row
Hydromining gas supporting technology, the bubble row's note foaming agent of solution routine simultaneously can not directly arrive pit shaft hydrops section, foaming agent fills difficulty,
Time-consuming long, when utilizing ejector pump to spray, suction inlet produces negative pressure simultaneously, is pumped out by the mixed liquor of pit shaft, sends into conveyance conduit row
Go out.
Claims (9)
1. for a comprehensive draining gas production system for low-voltage and low-yield well, including the gas production oil pipe that can stretch in pit shaft gas production face
And be socketed in this gas production oil pipe (1) tubing and casing (2) outward (1), it is characterised in that: described comprehensive draining gas production system also includes
Multi-functional conveyer device (3) and packer (4), end can stretch into the described multi-functional conveyer device in below pit shaft gas production face
(3) being set in described gas production oil pipe (1), described gas production oil pipe (1) and described tubing and casing (2) are positioned at one end, pit shaft gas production face
Gap sealed by described packer (4)；For removing the draining of the following hydrops in described low-voltage and low-yield well shaft gas production face
Gas production medium, directly inputs below gas production face by described multi-functional conveyer device (3) under the cooperation of described gas production oil pipe (1)
Hydrops in.
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 1, it is characterised in that: described many
Function conveyer device (3) includes that continuous little oil pipe (5), described comprehensive draining gas production system also include being arranged in described low force down
The production tree (7) producing well well head (6) and the high-pressure natural gas storage tank (8) being connected with this production tree (7), described gas production oil pipe
(1) being connected with described production tree (7), described continuous little oil pipe (5) is by described production tree (7) and described high pressure sky
So gas storage tank (8) connects.
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 2, it is characterised in that: described combines
Close water pumping gas production system and also include that described compression system passes through containing CNG tank car (23) and the compression system of booster pump (22)
Described production tree (7) and described high-pressure natural gas storage tank (8) are connected in parallel on the input of described continuous little oil pipe (5).
4. according to the comprehensive draining gas production system for low-voltage and low-yield well described in Claims 2 or 3, it is characterised in that: in institute
The end stating continuous little oil pipe (5) there also is provided founding shower nozzle (9).
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 4, it is characterised in that: described many
Function conveyer device (3) also includes the center oil pipe (10) being set in described continuous little oil pipe (5), and described comprehensive draining is adopted
Gas system also includes bubble row's assembly (11), and described center oil pipe (10) is by described production tree (7) and described bubble row's group
Part (11) connects；During bubble row, the foaming agent being stored in described bubble row's assembly (11) passes through described center oil pipe (10),
Pit shaft hydrops section is directly arrived under the cooperation of described production tree (7).
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 5, it is characterised in that: described bubble
Row's assembly (11) includes foaming agent tank, (12) foaming dosing pump (13) and bubble row's sled (14), described foaming agent tank (12) and institute
The foaming dosing pump (13) stated is installed on described bubble row's sled (14), and described center oil pipe (10) is by described foaming
Dosing pump is connected with the foaming agent tank (12) described in (13).
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 2, it is characterised in that: described combines
Closing water pumping gas production system and also include negative suction system (15), described negative suction system (15) is by described production tree
(7) connect with described gas production oil pipe (1).
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 7, it is characterised in that: described is negative
Pressure aspirator (15) includes multicylinder pump (19), ejector pump (16), sleeping tank (17) and suction sled (18), described multicylinder pump
(19), ejector pump (16) and described sleeping tank (17) be installed in described suction sled (18), entering of described ejector pump (16)
Mouth is connected with the outlet of multicylinder pump (19), and the negative pressure mouth of described ejector pump (16) is connected with the speed control muffler of production tree (7).
Comprehensive draining gas production system for low-voltage and low-yield well the most according to claim 2, it is characterised in that: described combines
Close water pumping gas production system and also include high-pressure gas-liquid sand separating apparatus (20) and high-pressure gas-liquid segregation apparatus (21), described high pressure gas
Liquid sand separating apparatus (20) and the gas output end being connected to production tree (7) of described high-pressure gas-liquid segregation apparatus (21) order
On.
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| CN201610615994.7A CN106050198B (en) | 2016-07-29 | 2016-07-29 | Comprehensive drainage gas production system for low-pressure low-yield well |
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| CN107288600A (en) * | 2017-08-07 | 2017-10-24 | 南充西南石油大学设计研究院有限责任公司 | Tail gas re-injection and the device and technique of UTILIZATION OF VESIDUAL HEAT IN composite flooding oilfield stimulation |
| CN108843276A (en) * | 2018-06-12 | 2018-11-20 | 中国石油天然气股份有限公司 | Casing deformation well involving swab method |
| CN113638717A (en) * | 2021-09-14 | 2021-11-12 | 四川恒重清洁能源成套装备制造有限公司 | Low-pressure low-yield well drainage gas recovery method |
| CN114233254A (en) * | 2021-12-03 | 2022-03-25 | 中石化石油机械股份有限公司研究院 | Drainage and gas production device integrating foam drainage and pressurization functions and construction method thereof |
| CN114233254B (en) * | 2021-12-03 | 2023-09-22 | 中石化石油机械股份有限公司研究院 | Construction method of drainage gas production device integrating foam drainage and pressurization functions |
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