CN102287171A - Automatic delivery device for natural gas well foam water discharge rod - Google Patents
Automatic delivery device for natural gas well foam water discharge rod Download PDFInfo
- Publication number
- CN102287171A CN102287171A CN2011100602765A CN201110060276A CN102287171A CN 102287171 A CN102287171 A CN 102287171A CN 2011100602765 A CN2011100602765 A CN 2011100602765A CN 201110060276 A CN201110060276 A CN 201110060276A CN 102287171 A CN102287171 A CN 102287171A
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- Prior art keywords
- water discharge
- tube connector
- delivery device
- natural gas
- gas well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000002343 natural gas well Substances 0.000 title claims abstract description 26
- 239000006260 foam Substances 0.000 title abstract description 3
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 22
- 238000005187 foaming Methods 0.000 claims description 38
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000005304 joining Methods 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005086 pumping Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000008258 liquid foam Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010016173 Fall Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention discloses an automatic delivery device for a natural gas well foam water discharge rod, which comprises a rod storage tube, a first connecting pipe, a second connecting pipe, a vertical well connecting pipe, a motive power device, a control system and a hanging disc assembly, wherein the hanging disc assembly can rotate through being driven by the motive power device and is arranged in the rod storage tube, the hanging disc assembly comprises a tray and a hanging disc arranged on the tray, the bottom of the rod storage tube is provided with a lower cover, the motive power device is positioned under the lower cover, a transmission shaft arranged on the motive power device is connected with the lower cover through a bearing, in addition, the transmission shaft extends out from the lower cover to be connected with the tray, the bottom of the rod storage tube is provided with a delivery falling opening, the delivery falling opening is connected with the first connecting pipe, the first connecting pipe is connected with the second connecting pipe through an upper electromagnetic valve, the second connecting pipe is connected with the vertical shaft connecting pipe through a lower electromagnetic valve, and an electromagnetic bleed valve is arranged on the second connecting pipe. The automatic delivery device has the advantages that the structure is simple, the use is convenient, the operation is simple, a large amount of labor is saved, and the popularization and the application are convenient.
Description
Technical field
The present invention relates to a kind of delivery device, particularly relate to a kind of natural gas well foaming water discharge rod delivery device automatically.
Background technology
In gas well, often there are hydro carbons condensed liquid or formation water to flow into the shaft bottom.The quantity of and FIH big when gas well output height, shaft bottom gas-liquid speed relatively more after a little while, water will be carried into ground by air-flow fully, otherwise, hydrops will appear in the pit shaft.At present, the method for eliminating pit shaft hydrops mainly contains aerodynamic processes, mechanical means and physico-chemical process three classes.Wherein the most representative have tubing string water pumping gas production, plunger lift water pumping gas production and foaming water discharge gas production three class methods.
The tubing string water pumping gas production is making full use of a kind of self-operated type gaslift water pumping gas production method of gas well self-energy, mainly to be applicable to flowing well, and the discharge opeing ability is influenced greatly by well bore;
The plunger lift water pumping gas production is that the plunger that utilizes the gas well self-energy to promote in the oil pipe is lifted water, needs high-pressure gas well or compressor as high-pressure air source, requires sleeve pipe must bear the gas injection high pressure, and is high to the security reliability requirement of device.
The foaming water discharge gas production is exactly to inject certain from well head to the shaft bottom can meet the surfactant (being frother) that water bubbles, and shaft bottom ponding by the stirring of natural gas flow, generates a large amount of low density water foams, with air-flow is carried to ground with after frother contacts.Its advantage is that investment is little, remarkable in economical benefits, and coordinative composition of equipments is simple, and the management easy construction is easy to promote, and compliance is strong, selects the well scope big.
The active matter of foaming water discharge gas production comprises that liquid foam discharging agent and solid steep two kinds of row's rods.The injection of liquid foam discharging agent is by pump well to be squeezed in the bubble discharge opeing, needs bigger electric energy, and consumes power is more.Solid bubble row is dropped in the well by well head mainly by manually-operated excellent present stage, and process is loaded down with trivial details, and workload is big.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, a kind of natural gas well foaming water discharge rod delivery device automatically is provided.This delivery device is simple in structure, easy to use, simple to operate, saved great amount of manpower, is convenient to promote the use of.
For achieving the above object, the technical solution used in the present invention is: natural gas well foaming water discharge rod is delivery device automatically, it is characterized in that: comprise storage rod tube, tube connector one, tube connector two, the vertical shaft tube connector, power set and control system, and the extension dish assembly that under the drive of power set, can rotate, described extension dish assembly is installed in the storage rod tube, described extension dish assembly comprises pallet and the extension dish that is installed on the pallet, the bottom of described storage rod tube is provided with lower cover, described power set are positioned at the below of lower cover, power transmission shaft on the described power set is connected by bearing with lower cover, and described power transmission shaft stretches out from lower cover with pallet and is connected; The excellent tube bottom of described storage is provided with precipitates mouth, the described mouth of precipitating links to each other with tube connector one, described tube connector one is connected with tube connector two by last electromagnetic valve, and electromagnetic valve was connected with the vertical shaft tube connector under described tube connector two passed through, and described tube connector two is provided with electromagnetic release valve; Described control system comprises the processor that is integrated with delay control circuit, the excellent displacement detector that falls that is arranged in the tube connector two and joins with processor, the pressure transmitter one that is arranged on the electromagnetic release valve and joins with processor, the pressure transmitter two that is arranged in the vertical shaft tube connector and joins with processor, timing circuit that joins with processor and the remote transmission module of joining with processor, Terminal Server Client that joins with the remote transmission module and the interlock circuit module of joining with processor, the described electromagnetic valve of going up joins with the interlock circuit module respectively with following electromagnetic valve, described electromagnetic release valve and processor join, and described power set and processor join.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and the described excellent displacement detector that falls comprises infrared emission tube and the infrared receiver tube that is symmetricly set in the tube connector two.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and the described excellent displacement detector that falls comprises that homonymy is arranged on ultrasonic emitting pipe and the ultrasonic wave receiving tube in the tube connector two.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and described control system also comprises the fault alarm that joins with processor.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and described extension dish is provided with parting bead.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and described power transmission shaft stretches out from pallet, and the part that described power transmission shaft stretches out is equipped with locking nut.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and described power set are drive motors.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and the described electromagnetic valve of going up is electrical ball valve with following electromagnetic valve.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and the bottom of described lower cover and power transmission shaft contact position are provided with seal cover.
Above-mentioned natural gas well foaming water discharge rod is delivery device automatically, and described storage rod tube is provided with loam cake, and described loam cake is provided with handle.
The present invention compared with prior art has the following advantages: the present invention is simple in structure, easy to use, simple to operate, saved great amount of manpower, and is easy to utilize.And this device is subjected to extraneous natural cause interference reduction, the job stability height, and volume is little, and installation and maintenance are simple, and easy installation and removal does not influence other construction of well head.And described power set are micromachine or servomotor, set rotational pulse number, rotational angle and rotation blanking time of micromachine or servomotor, realize the accurate micro-control that pallet is rotated.The control system that adopts can realize the automatic control to the delivery of foaming water discharge rod, and is very easy to use.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The theory diagram of Fig. 2 control system of the present invention.
Description of reference numerals:
1-storage rod tube; The 2-parting bead; 3-extension dish;
The 4-locking nut; The 5-pallet; The 6-lower cover;
7-tube connector one; The last electromagnetic valve of 8-; 9-tube connector two;
10-pressure transmitter one; The 11-electromagnetic release valve; Electromagnetic valve under the 12-;
13-vertical shaft tube connector; The 14-power set; The 15-seal cover;
The 16-power transmission shaft; 17-foaming water discharge rod; The 18-loam cake;
The 19-handle; The 20-excellent displacement detector that falls; 21-pressure transmitter two;
22-remote transmission module; The 23-Terminal Server Client; The 24-processor;
25-interlock circuit module; The 26-fault alarm; The 27-timing circuit.
The specific embodiment
A kind of natural gas well foaming water discharge rod as shown in Figure 1 is delivery device automatically, comprise storage rod tube 1, tube connector 1, tube connector 29, vertical shaft tube connector 13, power set 14 and control system, and the extension dish assembly that under the drive of power set 14, can rotate, described extension dish assembly is installed in the storage rod tube 1, described extension dish assembly comprises pallet 5 and the extension dish 3 that is installed on the pallet 5, the bottom of described storage rod tube 1 is provided with lower cover 6, described power set 14 are positioned at the below of lower cover 6, power transmission shaft 16 on the described power set 14 and lower cover 6 are connected by bearing, and described power transmission shaft 16 stretches out from lower cover 6 with pallet 5 and is connected; Described storage rod tube 1 bottom is provided with precipitates mouth, the described mouth of precipitating links to each other with tube connector 1, described tube connector 1 is connected with tube connector 29 by last electromagnetic valve 8, and electromagnetic valve 12 was connected with vertical shaft tube connector 13 under described tube connector 29 passed through, and described tube connector 29 is provided with electromagnetic release valve 11; As shown in Figure 2, described control system comprises the processor 24 that is integrated with delay control circuit, the excellent displacement detector 20 that falls that is arranged in the tube connector 29 and joins with processor 24, the pressure transmitter 1 that is arranged on the electromagnetic release valve 11 and joins with processor 24, the pressure transmitter 2 21 that is arranged in the vertical shaft tube connector 13 and joins with processor 24, timing circuit 27 that joins with processor 24 and the remote transmission module 22 of joining with processor 24, Terminal Server Client 23 that joins with remote transmission module 22 and the interlock circuit module 25 of joining with processor 24, the described electromagnetic valve 8 of going up joins with interlock circuit module 25 respectively with following electromagnetic valve 12, described electromagnetic release valve 11 joins with processor 24, and described power set 14 join with processor 24.
During use, open storage rod tube 1, placing a plurality of foaming water discharge rods 17 and a plurality of foaming water discharge rod 17 on the described pallet 5 between described extension dish 3 and storage rod tube 1, utilize the pressure transmitter 2 21 real-time pressure that detect in the vertical shaft tube connector 13, when pressure is no more than 4MPa, fall rod action of definite execution, whether at this moment detect in real time by pressure transmitter 1 has pressure to exist in the tube connector 29, if pressure is arranged, then open electromagnetic release valve 11 venting, when the pressure with tube connector 29 is zero, electromagnetic release valve 11 is closed, this moment, the pressure transmitter one 10 zero pressure signals with this moment were transferred to processor 24, described processor 24 is opened electromagnetic valve 8, start power set 14 simultaneously and drive power transmission shaft 16, thereby entering, power transmission shaft 16 drive pallets 5 rotation drive foaming water discharge rods 17 precipitate mouth, 17 free-fallings of foaming water discharge rod enter in the tube connector 29, the excellent displacement detector 20 that falls detects the signal that foaming water discharge rod 17 fallen to finishing and detected foaming water discharge rod 17 has been fallen to finishing and is transferred to processor 24, described processor 24 controls are gone up electromagnetic valve 8 and are closed, treat that electromagnetic valve 8 cuts out fully, processor 24 control electromagnetic valve 12 is down opened and the delay control circuit by processor 24 inside postpones 30 seconds, when treating that foaming water discharge rod 17 drops in the vertical shaft tube connector 13, following electromagnetic valve 12 cuts out, electromagnetic release valve 11 is opened once more, bleed off the gas in the tube connector 29, enter next caber circulation.Described power set 14 are drive motors, and drive motors is micromachine or servomotor, set rotational pulse number, rotational angle and rotation blanking time of micromachine or servomotor, realize the accurate micro-control that pallet 5 is rotated.Processor 24 is connected to remote transmission module 22, and remote transmission module 22 is connected to Terminal Server Client 23, carries out long-range caber operation as required at Terminal Server Client 23.Last electromagnetic valve 8 and following electromagnetic valve 12 carry out interlocking by interlock circuit module 25, and electromagnetic valve 8 and following electromagnetic valve 12 can not be opened simultaneously in the control.The described excellent displacement detector 20 that falls comprises infrared emission tube and the infrared receiver tube that is symmetricly set in the tube connector 29.The another kind of structure of the described excellent displacement detector 20 that falls is to comprise that homonymy is arranged on ultrasonic emitting pipe and the ultrasonic wave receiving tube in the tube connector 29.
Preferred way is that described control system also comprises the fault alarm 26 that joins with the excellent displacement detector 20 that falls, and receives the signal of excellent displacement detector 20 transmission, and rub-out signal is reported to the police.Described extension dish 3 is provided with parting bead 2, by parting bead 2 is set each foaming water discharge rod 17 is separated, and makes that the input of foaming water discharge rod 17 is more smooth and easy.Described electromagnetic release valve 11 is provided with pressure transmitter 10, and the air pressure that can detect in the tube connector 29 cooperates electromagnetic release valve 11 work.Described power transmission shaft 16 stretches out from pallet 5, and the part that described power transmission shaft 16 stretches out is equipped with locking nut 4, can be more fastening with being connected of pallet 5 to making power transmission shaft 16 by locking nut 4.The described electromagnetic valve 8 of going up is electrical ball valve with following electromagnetic valve 12.The bottom of described lower cover 6 and power transmission shaft 16 contact positions are provided with seal cover 15.Described storage rod tube 1 is provided with loam cake 18, and described loam cake 18 is provided with handle 19, moves with convenient.Preferably, described electromagnetic valve 8, following electromagnetic valve 12 and the electromagnetic release valve 11 gone up is globe valve.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. natural gas well foaming water discharge rod delivery device automatically, it is characterized in that: comprise storage rod tube (1), tube connector one (7), tube connector two (9), vertical shaft tube connector (13), power set (14) and control system, and the extension dish assembly that under the drive of power set (14), can rotate, described extension dish assembly is installed in the storage rod tube (1), described extension dish assembly comprises pallet (5) and is installed in extension dish (3) on the pallet (5), the bottom of described storage rod tube (1) is provided with lower cover (6), described power set (14) are positioned at the below of lower cover (6), power transmission shaft (16) on the described power set (14) is connected by bearing with lower cover (6), and described power transmission shaft (16) stretches out from lower cover (6) with pallet (5) and is connected; Described storage rod tube (1) bottom is provided with precipitates mouth, the described mouth of precipitating links to each other with tube connector one (7), described tube connector one (7) is connected with tube connector two (9) by last electromagnetic valve (8), electromagnetic valve (12) was connected with vertical shaft tube connector (13) under described tube connector two (9) passed through, and described tube connector two (9) is provided with electromagnetic release valve (11); Described control system comprises the processor (24) that is integrated with delay control circuit, the excellent displacement detector (20) that falls that is arranged in the tube connector two (9) and joins with processor (24), the pressure transmitter one (10) that is arranged on that electromagnetic release valve (11) is gone up and joins with processor (24), the pressure transmitter two (21) that is arranged in the vertical shaft tube connector (13) and joins with processor (24), timing circuit (27) that joins with processor (24) and the remote transmission module (22) of joining with processor (24), Terminal Server Client (23) that joins with remote transmission module (22) and the interlock circuit module (25) of joining with processor (24), described upward electromagnetic valve (8) and following electromagnetic valve (12) join with interlock circuit module (25) respectively, described electromagnetic release valve (11) joins with processor (24), and described power set (14) join with processor (24).
2. natural gas well foaming water discharge according to claim 1 rod is delivery device automatically, it is characterized in that: the described excellent displacement detector (20) that falls comprises infrared emission tube and the infrared receiver tube that is symmetricly set in the tube connector two (9).
3. natural gas well foaming water discharge according to claim 1 rod is delivery device automatically, it is characterized in that: the described excellent displacement detector (20) that falls comprises that homonymy is arranged on ultrasonic emitting pipe and the ultrasonic wave receiving tube in the tube connector two (9).
4. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: described control system also comprises the fault alarm (26) that joins with processor (24).
5. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: described extension dish (3) is provided with parting bead (2).
6. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: described power transmission shaft (16) stretches out from pallet (5), and the part that described power transmission shaft (16) stretches out is equipped with locking nut (4).
7. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: described power set (14) are drive motors.
8. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, it is characterized in that: described upward electromagnetic valve (8) and following electromagnetic valve (12) are electrical ball valve.
9. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: the bottom of described lower cover (6) and power transmission shaft (16) contact position are provided with seal cover (15).
10. natural gas well foaming water discharge rod according to claim 1 is delivery device automatically, and it is characterized in that: described storage rod tube (1) is provided with loam cake (18), and described loam cake (18) is provided with handle (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110060276.5A CN102287171B (en) | 2011-03-14 | 2011-03-14 | Automatic delivery device for natural gas well foam water discharge rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110060276.5A CN102287171B (en) | 2011-03-14 | 2011-03-14 | Automatic delivery device for natural gas well foam water discharge rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102287171A true CN102287171A (en) | 2011-12-21 |
| CN102287171B CN102287171B (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110060276.5A Expired - Fee Related CN102287171B (en) | 2011-03-14 | 2011-03-14 | Automatic delivery device for natural gas well foam water discharge rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102287171B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017123A (en) * | 2018-01-04 | 2019-07-16 | 中国石油天然气股份有限公司 | Foam drainage gas recovery method, apparatus and system |
| CN111075500A (en) * | 2019-12-20 | 2020-04-28 | 中煤科工集团重庆研究院有限公司 | Foam drainage and air extraction device and method for underground hole of underground water-containing coal seam of coal mine |
| CN115324531A (en) * | 2022-06-24 | 2022-11-11 | 四川大学 | Multi-shape throwing device for throwing natural gas well foam discharging agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6039122A (en) * | 1998-10-26 | 2000-03-21 | Gonzalez; Leonel | Methods and apparatus for automatically lauching sticks of various materials into oil and gas wells |
| US6269875B1 (en) * | 1997-05-20 | 2001-08-07 | The Harrison Investment Trust | Chemical stick storage and delivery system |
| CN101408098A (en) * | 2008-11-19 | 2009-04-15 | 西安长庆科技工程有限责任公司 | Timing automatic ball-throwing apparatus and method |
| CN101476457A (en) * | 2009-01-20 | 2009-07-08 | 邵靖 | Automatic ball projection apparatus for oil well |
| CN201972679U (en) * | 2011-03-14 | 2011-09-14 | 西安奥益达石油技术开发有限公司 | Automatic delivery device of foam drainage rods of natural gas well |
-
2011
- 2011-03-14 CN CN201110060276.5A patent/CN102287171B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269875B1 (en) * | 1997-05-20 | 2001-08-07 | The Harrison Investment Trust | Chemical stick storage and delivery system |
| US6039122A (en) * | 1998-10-26 | 2000-03-21 | Gonzalez; Leonel | Methods and apparatus for automatically lauching sticks of various materials into oil and gas wells |
| CN101408098A (en) * | 2008-11-19 | 2009-04-15 | 西安长庆科技工程有限责任公司 | Timing automatic ball-throwing apparatus and method |
| CN101476457A (en) * | 2009-01-20 | 2009-07-08 | 邵靖 | Automatic ball projection apparatus for oil well |
| CN201972679U (en) * | 2011-03-14 | 2011-09-14 | 西安奥益达石油技术开发有限公司 | Automatic delivery device of foam drainage rods of natural gas well |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017123A (en) * | 2018-01-04 | 2019-07-16 | 中国石油天然气股份有限公司 | Foam drainage gas recovery method, apparatus and system |
| CN111075500A (en) * | 2019-12-20 | 2020-04-28 | 中煤科工集团重庆研究院有限公司 | Foam drainage and air extraction device and method for underground hole of underground water-containing coal seam of coal mine |
| CN115324531A (en) * | 2022-06-24 | 2022-11-11 | 四川大学 | Multi-shape throwing device for throwing natural gas well foam discharging agent |
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| Publication number | Publication date |
|---|---|
| CN102287171B (en) | 2014-06-04 |
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Granted publication date: 20140604 |