CN204041022U - A kind of twofold whirl water pumping gas production downhole tool - Google Patents

A kind of twofold whirl water pumping gas production downhole tool Download PDF

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Publication number
CN204041022U
CN204041022U CN201420451905.6U CN201420451905U CN204041022U CN 204041022 U CN204041022 U CN 204041022U CN 201420451905 U CN201420451905 U CN 201420451905U CN 204041022 U CN204041022 U CN 204041022U
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CN
China
Prior art keywords
center tube
circle
urceolus
fishing head
ring
Prior art date
Application number
CN201420451905.6U
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Chinese (zh)
Inventor
魏航信
余秀丽
韩成才
吴伟
职黎光
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西安石油大学
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Priority to CN201420451905.6U priority Critical patent/CN204041022U/en
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Publication of CN204041022U publication Critical patent/CN204041022U/en

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Abstract

The utility model discloses a kind of twofold whirl water pumping gas production downhole tool, it comprises the fishing head being positioned at oil pipe, one end of described fishing head is provided with slips and split ring, four slips circumference uniform distributions are on fishing head, its medial surface is conical surface ring surface, its lateral surface is arcwall face, described conveyor screw entirety is solid cylinder body structure, its periphery is provided with hurricane band, the inwall of described fishing head is the smooth inner wall with hurricane band clearance sliding fit, one end that described conveyor screw is positioned at fishing head is connected with joint by screw thread, this joint radial direction offers a groove be connected with conveyor screw helicla flute, the other end of described joint is connected with the restriction choke of hollow, the other end of this restriction choke is connected with upper center tube by box cupling, described upper center tube entirety is the tubular structure of hollow, side in the middle part of it offers radial hole.The utility model realizes the eddy motion of biphase gas and liquid flow in the natural gas well, improves gas fluid-carrying capability in natural gas production, prevents the generation of shaft bottom hydrops problem.

Description

A kind of twofold whirl water pumping gas production downhole tool

Technical field

The utility model relates to a kind of twofold whirl downhole tool for water pumping gas production in natural gas extraction.

Background technology

1) Research Significance and necessity

Natural gas invariably accompanies in producing the generation of salt solution, hydrocarbon liquid, and these liquid are carried to ground by natural gas from shaft bottom with droplet form.But domestic gas field strata pressure is low, gas output per well is low, along with the continuous exploitation of natural gas, natural gas fluid-carrying capability declines, and liquid just deposits in pit shaft.Hydrops makes back pressure raise, and affects production capacity, even " is drowned " gas well.Therefore need a kind of technology, realize, in gas recovery, the liquid that stratum produces is discharged to well head, i.e. the liquid discharging gas producing of the natural gas well, thus solve the problem of shaft bottom hydrops.

2) prior art analysis

The water drainage-gas recovery technology methods such as existing drainage gas recovery has optimizing pipe string, foaming water discharge, Plunger Lift, gaslift, machine are taken out, underground throttle device technology.These methods not only efficiency are low and some needs additional ground equipment, this not only increases cost of winning, have impact on gas well output, and validity are poor.

(1) optimizing pipe string: the method is used in water-beating gas well mid-later development phase, by adjusting and optimizing tubing string internal diameter, reduces the slippage loss of air-flow, realizes the increase of natural gas liquid carry over.The method shortcoming is that gas well lifting rate is unsuitable excessive, and the restriction that depth of setting is subject to oil pipe intensity can not too deeply, because reproducing difficulty in starting after kill-job, require to realize snubbing service when playing lower tubular column.

(2) foaming water discharge: for the gas well of fluid-carrying capability deficiency, the method by surfactant (frother) at the bottom of well head Injection Well, reduce surface tension of liquid, produce resistance aqueous foam more stable in a large number, make shaft bottom hydrops more easily be discharged ground.The shortcoming of the method is when aquifer yield is large, needs a large amount of chemical agent, uneconomical economically, when stratum oil-containing, can play elimination foaming, and bubble row effect is reduced.

(3) Plunger Lift: Plunger Lift is exactly utilize plunger as the immobile interface between liquid and lifting gas, prevents the channelling of gas and the falling of liquid.The motion of plunger both can utilize down-hole energy, also can inject gases at high pressure makeup energy from ground.But its shortcoming is shaft bottom daily output water can not be greater than 50m 3/ d, gas liquid ratio need be greater than 500m 3/ m 3, and ground needs supporting special wellhead assembly.

(4) gaslift: the method, by external source of the gas or compressor, to reduce in well fluid density between gas injection point and ground by injecting the method for gases at high pressure to down-hole, makes liquid in well more easily discharge ground.The shortcoming of the method needs complicated ground installation, and cost is high.

(5) machine is taken out: the method is appropriate depth deep well pump being lowered into below pit shaft liquid level, by sucker rod in ground oil pumper and well, drives deep well pump plunger reciprocates, realizes the discharge of liquid in well.The major defect of the method is that equipment investment is large, and in well, gas-liquid mixed multiphase flow makes pump efficiency decline, sucker rod and pump fragile.

(6) underground throttle device: when formation gas is by restriction choke throttle orifice, its pressure reduces, rapid atomization, and absorbs Formation heat.The method advantage to utilize stratum heat energy to the cryogenic natural gas heating after throttling, thus after reaching reduction throttling, pressure and hydrate generate temperature, prevent from forming Hydrate Plugging, improve the safety of gas production gathering system simultaneously.But the method is undesirable for water pumping gas production effect.

The improvement of conventional art---cyclone technique:

For above-mentioned technical disadvantages, adopt the downhole rotational-flow instrument of cyclone technique (also claiming eddy current instrument) to realize water pumping gas production at home and abroad to be paid close attention to, this method general principle is: the gas-liquid mixed from shaft bottom flows to into this device, tangentially spray along tube inner wall through spiral groove high-speed, form a high-speed rotary eddy current.Because bumpy flow motion makes fluid high-speed rotate, under the influence of centrifugal force, make heavier liquid get rid of to tube wall, form orderly liquid stream, air-flow is in tube center, forms an air-flow post, thus makes liquid effectively increase, and solves the problem of liquid discharging gas producing.

Existing eddy flow instrument has following several pattern:

I class: be arranged on bottom oil pipe, be connected threadably with oil pipe, must mention oil pipe during installation, requires harsher to shaft bottom hole condition, and there be limited evidence currently of uses.

II class: adopt and be threaded up and down, can be arranged on any position in the middle of oil pipe, lower the requirement to shaft bottom hole condition, but when installing, still will propose oil pipe, and there be limited evidence currently of uses.

III class: utilize the box cupling of oil pipe by setting for underground vortex tool positioned, need not mention oil pipe during installation, facilitate pulling operation, uses more at present.But this eddy flow instrument, at home by field trial, finds its less effective, when bottom pressure low and moisture more time, its drainage effect obviously declines, and its reason is as follows:

A. because eddy flow instrument helicla flute top margin and tube inner wall exist annular space district, in this region, gas-liquid mixture fluid does not carry out screw, and therefore its quick rising can destroy the eddy current that helicla flute is discharged, thus reduces discharge opeing effect;

B. owing to being generally provided with restriction choke in gas well, and eddy flow instrument can only portion mounted thereto, there is certain distance between the two, there is the pressure loss in such one side restriction choke, eddy flow instrument inlet pressure is reduced, and form drop through the vaporific eddy flow instrument entrance that flows to of restriction choke outlet, reduce the result of use of eddy flow instrument.

3) the utility model patent main thought

Analyze existing downhole rotational-flow instrument, its major defect is that hurricane band and tube inner wall exist annular space, destroys the eddy-currents formed, and separately because eddy flow instrument entrance exists drop but not mist flow, makes eddy flow deleterious.Therefore the utility model patent mainly solves the problem, eliminate the fluid of the outside annular space of hurricane band, and increase restriction choke at hurricane band entrance, form mist flow, eddy flow effect is greatly improved, and therefore this device fundamentally can solve the problem of existing instrument water pumping gas production weak effect.In addition, this device can replace traditional underground throttle device, cyclone and restriction choke is united two into one, and reduces equipment cost.

Utility model content

The utility model object is to provide a kind of twofold whirl water pumping gas production downhole tool, and it can solve problem existing in background technology effectively.

In order to solve problem existing in background technology, it comprises the fishing head 2 being positioned at oil pipe 1, one end of described fishing head 2 is provided with slips 8 and split ring 10, four slips 8 circumference uniform distributions are on fishing head 2, its medial surface is conical surface ring surface, its lateral surface is arcwall face, described conveyor screw 3 entirety is solid cylinder body structure, its periphery is provided with hurricane band, the inwall of described fishing head 2 is the smooth inner wall with hurricane band clearance sliding fit, one end that described conveyor screw 3 is positioned at fishing head 2 is connected with joint 4 by screw thread, this joint 4 radial direction offers 4 grooves be connected with conveyor screw 3 helicla flute, the other end of described joint 4 is connected with the restriction choke 5 of hollow, the other end of this restriction choke 5 is connected with upper center tube 7 by box cupling 6, described upper center tube 7 entirety is the tubular structure of hollow, side in the middle part of it offers radial hole, shear pin 11 is installed in this radial hole, the first convex shoulder of a circle and inner core 17 clearance sliding fit is extended outward near the bottom of described upper center tube 7, the one end being enclosed within the upper spring 19 on upper center tube 7 withstands on this first convex shoulder, its other end withstands on the second convex shoulder of lower center tube 21, the second described convex shoulder be positioned at lower center tube 21 end and with inner core 17 clearance sliding fit, one end of described lower center tube 21 is against the end of upper center tube 7, its other end is through inner core 17 and urceolus base 22, on described lower center tube 21, cover has lower spring 20, one end of this lower spring 20 withstands on the second convex shoulder, its other end withstands on the inner side of inner core 17, described inner core 17 entirety is the tubular structure of hollow, its other end spins and is fixed in lower pushing ring 16, described lower pushing ring 16 entirety is enclosed within upper center tube 7, its other end extends outward the concentric boss of a circle, on this boss, cover has a circle along the upper pushing ring 15 of boss axially-movable, described lower pushing ring 16 spins with lower center tube 17 and is connected, this lower pushing ring 16 front end spins with slip spider 9 and is connected, this slip spider 9 is overall for be socketed with upper center tube 7 the hollow taper structure be slidably matched, its taper seat is socketed with the reaming of deck inner conical and coordinates, its one end being positioned at vertex of a cone place extends outward the sleeve that a circle coordinates with its socket, front end and shear pin 11 grafting be arranged in radial hole of this sleeve are fixed, the outside of described inner core 17 is provided with a circle urceolus 18, one end of this urceolus 18 is connected with urceolus base 22 by screw thread, this urceolus base 22 is socketed with lower center tube 21 and coordinates, the other end of described urceolus 18 is socketed in pushing ring 15.

One end outside described urceolus base 22 is socketed with the nut 24 coordinated that to spin with lower center tube 21, is provided with holding screw 23 between this nut 24 and urceolus base 22.

The outside of described upper pushing ring 15 is fixed with a circle glue tube base 13, and this glue tube base 13 is positioned at and is fixed with a circle lower seal packing element 14 near the side of urceolus 18.

The bottom of described slip spider 9 extends outward a circle foundation ring, and this foundation ring is positioned at and is fixed with cartridge 12 on a circle near the side of glue tube base 13.

Owing to have employed above technical scheme, the utility model has following beneficial effect: the eddy motion realizing biphase gas and liquid flow in the natural gas well, improves gas fluid-carrying capability in natural gas production, prevents the generation of shaft bottom hydrops problem.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model, below in conjunction with accompanying drawing, embodiment is briefly described.

Fig. 1 is that the utility model does not set the structure chart on tube inner wall;

Fig. 2 is that the utility model sets the structure chart on tube inner wall.

Detailed description of the invention

The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment being clearly and completely described.

Embodiment 1

Referring to Fig. 1-2, it comprises the fishing head 2 being positioned at oil pipe 1, one end of described fishing head 2 is provided with slips 8 and split ring 10, four slips 8 circumference uniform distributions are on fishing head 2, its medial surface is conical surface ring surface, its lateral surface is arcwall face, described conveyor screw 3 entirety is solid cylinder body structure, its periphery is provided with hurricane band, the inwall of described fishing head 2 is the smooth inner wall with hurricane band clearance sliding fit, one end that described conveyor screw 3 is positioned at fishing head 2 is connected with joint 4 by screw thread, this joint 4 radial direction offers 4 grooves be connected with conveyor screw 3 helicla flute, the other end of described joint 4 is connected with the restriction choke 5 of hollow, the other end of this restriction choke 5 is connected with upper center tube 7 by box cupling 6, described upper center tube 7 entirety is the tubular structure of hollow, side in the middle part of it offers radial hole, shear pin 11 is installed in this radial hole, the first convex shoulder of a circle and inner core 17 clearance sliding fit is extended outward near the bottom of described upper center tube 7, the one end being enclosed within the upper spring 19 on upper center tube 7 withstands on this first convex shoulder, its other end withstands on the second convex shoulder of lower center tube 21, the second described convex shoulder be positioned at lower center tube 21 end and with inner core 17 clearance sliding fit, one end of described lower center tube 21 is against the end of upper center tube 7, its other end is through inner core 17 and urceolus base 22, on described lower center tube 21, cover has lower spring 20, one end of this lower spring 20 withstands on the second convex shoulder, its other end withstands on the inner side of inner core 17, described inner core 17 entirety is the tubular structure of hollow, its other end spins and is fixed in lower pushing ring 16, described lower pushing ring 16 entirety is enclosed within upper center tube 7, its other end extends outward the concentric boss of a circle, on this boss, cover has a circle along the upper pushing ring 15 of boss axially-movable, described lower pushing ring 16 spins with lower center tube 17 and is connected, this lower pushing ring 16 front end spins with slip spider 9 and is connected, this slip spider 9 is overall for be socketed with upper center tube 7 the hollow taper structure be slidably matched, its taper seat is socketed with the reaming of deck inner conical and coordinates, its one end being positioned at vertex of a cone place extends outward the sleeve that a circle coordinates with its socket, front end and shear pin 11 grafting be arranged in radial hole of this sleeve are fixed, the outside of described inner core 17 is provided with a circle urceolus 18, one end of this urceolus 18 is connected with urceolus base 22 by screw thread, this urceolus base 22 is socketed with lower center tube 21 and coordinates, the other end of described urceolus 18 is socketed in pushing ring 15.

One end outside described urceolus base 22 is socketed with the nut 24 coordinated that to spin with lower center tube 21, is provided with holding screw 23 between this nut 24 and urceolus base 22.

The outside of described upper pushing ring 15 is fixed with a circle glue tube base 13, and this glue tube base 13 is positioned at and is fixed with a circle lower seal packing element 14 near the side of urceolus 18.

The bottom of described slip spider 9 extends outward a circle foundation ring, and this foundation ring is positioned at and is fixed with cartridge 12 on a circle near the side of glue tube base 13.

Embodiment 2

Referring to Fig. 1, when twofold whirl water pumping gas production downhole tool is gone into the well, by the pulling conveyor screw 3 upper end shaft shoulder (also claiming back-off sub), when transferring to appropriate location, down-hole, under the effect of ground vibrator, on carry conveyor screw 3, shear pin 11 is cut off, now due to upper spring 19 and the acting in conjunction of lower spring 11 (two springs are stage clip), promote lower center tube 21, nut 24, urceolus base 22, urceolus 18, glue tube base 13, slip spider 9 moves upward, when slip spider 9 touches slips 8, slips 8 outwards opens, be stuck on oil pipe 1 inwall, instrument is set, as shown in Figure 2.Meanwhile, upper cartridge 12, lower seal packing element 13 are compressed and open, and are close to oil pipe 1 inwall, play sealing function, make tool lower portion gas-liquid two-phase fluid can only enter upper center tube 7 endoporus.

Referring to Fig. 2, instrument sets the course of work after tube inner wall:

Instrument sets after oil pipe 1 inwall, its position maintains static, and because tool lower portion fluid pressure is greater than upper flow pressure, this pressure differential can make slips 8 be clamped on oil pipe 1 wall, upper cartridge 12, lower seal packing element 13 continue be compressed and open, and are close to oil pipe 1 inwall.The biphase gas and liquid flow of tool lower portion enters restriction choke 5 endoporus from lower center tube 21, upper center tube 7 endoporus, the biphase gas and liquid flow flowed out through restriction choke 5 endoporus is mist flow, entered in the helicla flute of conveyor screw 3 by the radial hole of joint 4, fluid in helicla flute while rise, while rotate, form high-speed eddy, enter oil pipe 1 from conveyor screw outlet.

The process tripped out from down-hole during tool maintenance:

When instrument needs repairing, mention fishing head 2 top, fishing head 2 drives slips 8 to move upward, now slips will inwardly shrink, thus unclamps with oil pipe 1 inwall, and upper cartridge 12, lower seal packing element 13 shrink and no longer seal, slips 8 moves up after a segment distance, with slip spider 9 together on move, now whole instrument by take well head to, implementation tool trip out process.

Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.

Claims (4)

1. a twofold whirl water pumping gas production downhole tool, it is characterized in that it comprises the fishing head (2) being positioned at oil pipe (1), one end of described fishing head (2) is provided with slips (8) and split ring (10), four slips (8) circumference uniform distributions are on fishing head (2), its medial surface is conical surface ring surface, its lateral surface is arcwall face, described conveyor screw (3) entirety is solid cylinder body structure, its periphery is provided with hurricane band, the inwall of described fishing head (2) is the smooth inner wall with hurricane band clearance sliding fit, one end that described conveyor screw (3) is positioned at fishing head (2) is connected with joint (4) by screw thread, this joint (4) radial direction offers (4) individual groove be connected with conveyor screw (3) helicla flute, the other end of described joint (4) is connected with the restriction choke (5) of hollow, the other end of this restriction choke (5) is connected with upper center tube (7) by box cupling (6), described upper center tube (7) entirety is the tubular structure of hollow, side in the middle part of it offers radial hole, shear pin (11) is installed in this radial hole, the first convex shoulder of a circle and inner core (17) clearance sliding fit is extended outward near the bottom of described upper center tube (7), the one end being enclosed within the upper spring (19) on upper center tube (7) withstands on this first convex shoulder, its other end withstands on the second convex shoulder of lower center tube (21), the second described convex shoulder be positioned at lower center tube (21) end and with inner core (17) clearance sliding fit, one end of described lower center tube (21) is against the end of upper center tube (7), its other end is through inner core (17) and urceolus base (22), the upper cover of described lower center tube (21) has lower spring (20), one end of this lower spring (20) withstands on the second convex shoulder, its other end withstands on the inner side of inner core (17), described inner core (17) entirety is the tubular structure of hollow, its other end spins and is fixed in lower pushing ring (16), described lower pushing ring (16) entirety is enclosed within upper center tube (7), its other end extends outward the concentric boss of a circle, on this boss, cover has a circle along the upper pushing ring (15) of boss axially-movable, described lower pushing ring (16) spins with lower center tube (17) and is connected, this lower pushing ring (16) front end spins with slip spider (9) and is connected, this slip spider (9) is overall for be socketed with upper center tube (7) the hollow taper structure be slidably matched, its taper seat is socketed with the reaming of deck inner conical and coordinates, its one end being positioned at vertex of a cone place extends outward the sleeve that a circle coordinates with its socket, front end and shear pin (11) grafting be arranged in radial hole of this sleeve are fixed, the outside of described inner core (17) is provided with a circle urceolus (18), one end of this urceolus (18) is connected with urceolus base (22) by screw thread, this urceolus base (22) is socketed with lower center tube (21) and coordinates, the other end of described urceolus (18) is socketed in pushing ring (15).
2. a kind of twofold whirl water pumping gas production downhole tool according to claim 1, it is characterized in that the one end in described urceolus base (22) outside is socketed with the nut (24) coordinated that to spin with lower center tube (21), between this nut (24) and urceolus base (22), be provided with holding screw (23).
3. a kind of twofold whirl water pumping gas production downhole tool according to claim 1, it is characterized in that the outside of described upper pushing ring (15) is fixed with a circle glue tube base (13), this glue tube base (13) is positioned at and is fixed with a circle lower seal packing element (14) near the side of urceolus (18).
4. a kind of twofold whirl water pumping gas production downhole tool according to claim 1, it is characterized in that the bottom of described slip spider (9) extends outward a circle foundation ring, this foundation ring is positioned at and is fixed with cartridge (12) on a circle near the side of glue tube base (13).
CN201420451905.6U 2014-08-04 2014-08-04 A kind of twofold whirl water pumping gas production downhole tool CN204041022U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105484711A (en) * 2015-12-14 2016-04-13 中国石油天然气股份有限公司 Rotational flow guide device
CN106351619A (en) * 2016-09-19 2017-01-25 西南石油大学 Underground spiral throttling device for natural gas well
CN106837266A (en) * 2016-12-26 2017-06-13 中国石油天然气股份有限公司 Gas well drainage underground gas production instrument based on jet with vortex one
CN107542430A (en) * 2017-08-24 2018-01-05 西安石油大学 A kind of low-voltage and low-yield gas well underground vortex forced drainage gas producing device
CN107664022A (en) * 2016-07-29 2018-02-06 中国石油天然气股份有限公司 It is vortexed guiding device
CN108397150A (en) * 2018-02-01 2018-08-14 宝鸡石油机械有限责任公司 A kind of connecting pipes impactor
CN109113670A (en) * 2017-06-23 2019-01-01 中国石油天然气股份有限公司 A kind of electric sealed vortex guiding device
CN109356554A (en) * 2018-11-28 2019-02-19 西安石油大学 A kind of underground self-operated type forced vortex water drainage gas production device
CN111502612A (en) * 2020-04-16 2020-08-07 上海交通大学 Water drainage gas production device based on supersonic velocity jet atomization

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105484711A (en) * 2015-12-14 2016-04-13 中国石油天然气股份有限公司 Rotational flow guide device
CN105484711B (en) * 2015-12-14 2018-01-02 中国石油天然气股份有限公司 A kind of impeller guide device
CN107664022A (en) * 2016-07-29 2018-02-06 中国石油天然气股份有限公司 It is vortexed guiding device
CN106351619A (en) * 2016-09-19 2017-01-25 西南石油大学 Underground spiral throttling device for natural gas well
CN106351619B (en) * 2016-09-19 2019-03-12 西南石油大学 One kind being used for natural gas well Underground Spiral throttling set
CN106837266A (en) * 2016-12-26 2017-06-13 中国石油天然气股份有限公司 Gas well drainage underground gas production instrument based on jet with vortex one
CN106837266B (en) * 2016-12-26 2019-05-03 中国石油天然气股份有限公司 Gas well drainage underground gas production tool based on jet stream and vortex one
CN109113670A (en) * 2017-06-23 2019-01-01 中国石油天然气股份有限公司 A kind of electric sealed vortex guiding device
CN109113670B (en) * 2017-06-23 2020-11-03 中国石油天然气股份有限公司 Electric sealing type eddy flow guiding device
CN107542430A (en) * 2017-08-24 2018-01-05 西安石油大学 A kind of low-voltage and low-yield gas well underground vortex forced drainage gas producing device
CN107542430B (en) * 2017-08-24 2019-12-17 西安石油大学 Low-pressure low-yield gas well underground vortex forced drainage gas production device
CN108397150A (en) * 2018-02-01 2018-08-14 宝鸡石油机械有限责任公司 A kind of connecting pipes impactor
CN109356554A (en) * 2018-11-28 2019-02-19 西安石油大学 A kind of underground self-operated type forced vortex water drainage gas production device
CN111502612A (en) * 2020-04-16 2020-08-07 上海交通大学 Water drainage gas production device based on supersonic velocity jet atomization

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Granted publication date: 20141224

Termination date: 20150804