CN112780334A - Shaft for extracting pure gas - Google Patents
Shaft for extracting pure gas Download PDFInfo
- Publication number
- CN112780334A CN112780334A CN202110289006.5A CN202110289006A CN112780334A CN 112780334 A CN112780334 A CN 112780334A CN 202110289006 A CN202110289006 A CN 202110289006A CN 112780334 A CN112780334 A CN 112780334A
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- gas
- shaft
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention aims to extract pure gas from a shaft, and simultaneously extracts gas contained in each coal seam of a coal seam group to produce coal seam gas. The shaft cover plate, the shaft penetrating through each coal seam, the drilling site niche in each coal seam and a plurality of gas extraction coal holes in each coal seam are connected in sequence. And a shaft gas extraction pipeline in the shaft is connected with a gas extraction vacuum pump on the ground. And a shaft gas injection pipe along the whole length of the shaft is connected with a gas user pipe network on the ground. The ground air pump is connected with an air pumping pipe inserted into the shaft, and the ground air pump is started to pump out air in the shaft. And meanwhile, a gas injection pipe of the shaft is opened, and gas with equal flow is injected into the shaft from the bottom of the shaft to replace air. And closing the air extractor and the shaft gas injection pipeline, and starting a gas extraction vacuum pump to extract coal bed gas. The invention is suitable for various coal seam groups.
Description
Technical Field
The invention relates to mining original coal bed gas, belonging to mining technology.
Background
The technical test of mining coal bed gas in the United states is to drill a hole from the ground to the coal bed. Government subsidies were discontinued in 2007 and the test failed.
The existing mine gas extraction technology is a ventilation coal roadway in a mine coal seam, the ventilation coal roadway is directly connected with a gas extraction coal hole, gas in the coal seam and air in the coal roadway are simultaneously pumped into the gas extraction hole to be mixed during extraction, mixed gas is obtained, the volume of hollow gas accounts for more than 80%, and the hollow gas cannot be used and can only be emptied.
Disclosure of Invention
The invention relates to a shaft for extracting pure gas, aiming at replacing the ground drilling hole in the prior art with the shaft, blocking air from being pumped into a gas extraction coal hole, and extracting the pure gas to produce coal layer gas.
The invention is applied suddenly, and the sealing problem of the shaft is solved. For this purpose, the shaft is connected to a water-filled circular water tank with a diameter equal to that of the shaft on the ground, a circular insert plate with a diameter equal to that of the shaft is connected to the lower surface of the shaft cover plate, and the circular insert plate is inserted into the circular water tank. The end part of the circular ring inserting plate is contacted with the bottom of the circular ring water tank to form a circular ring water seal shaft cover plate, so that the shaft is isolated from the ground atmosphere.
The annular water seal shaft cover plate and the shaft penetrating through each coal seam of the coal seam group are sequentially connected with the drilling site niches and the plurality of gas extraction coal holes in each coal seam, and the openings of the gas extraction coal holes are supported by sieve pipes.
In order to extract pure gas, the gas is required to replace the air in the shaft. In the shaft, a shaft gas injection pipeline with the same length as the shaft is connected with a gas user pipe network on the ground, and the shaft gas injection pipeline is provided with an electromagnetic valve. An exhaust pipe inserted into the shaft is connected with a ground air pump. And opening a ground air extractor and a shaft gas injection pipeline, completely extracting air from the shaft at the top of the shaft, and injecting equal-flow gas into the shaft from the bottom of the shaft to finish air replacement by the gas in the shaft. And the ground gas extraction vacuum pump is connected with a shaft gas extraction pipeline inserted into the shaft. And starting the ground gas extraction vacuum pump, and exhausting the gas in the coal seam into a gas extraction coal hole, the shaft gas extraction pipeline and the ground gas extraction vacuum pump in sequence and then into a gas user pipe network. The length of the circular ring inserting plate and the circular water tank in meters is larger than the length of the shaft gas extraction pipeline opening in meters of water column to atmospheric pressure, and shaft gas negative pressure exploitation is formed.
In order to prevent gas in the shaft from being extracted when gas is replaced, a niche sealing wall is arranged in the niche of the drilling site to seal each gas extraction coal hole. And the niche coal roadway is formed from the niche sealing wall to the end part of the niche. An electromagnetic valve is arranged on a niche gas pipe inserted into the niche coal roadway, and an electric lead and a control line of the electromagnetic valve are communicated with the ground. During the period of replacing air with gas, the electromagnetic valve closes the gas pipe of the wall box. When a shaft gas extraction pipeline is opened for gas extraction, the electromagnetic valve opens the niche gas pipe to form shaft gas negative pressure sealing strong gas extraction.
The shaft sealing method can be implemented by connecting a circular steel plate well cover with the diameter equal to that of the shaft on the ground through a steel plate shaft with the middle concrete shaft wall thickness. The circular steel plate well lid is welded with the edge of the top of the steel plate shaft at the edge of the whole circumference to form a fixed shaft cover plate.
The invention can also be implemented by sequentially and fully covering the top of the steel plate shaft with an elastic rubber plate, a steel plate well cover and a heavy object to form a semi-fixed shaft cover plate.
When the method is implemented, the shaft penetrates through the coal seam at the lowest part of the coal seam group and is connected with the train yard rock roadway and the water sump rock roadway in the bottom plate rock layer of the coal seam group. The shaft drain pipe is connected with the water sump rock lane and the ground oil pumping machine cracking head pump.
In order to prevent air from leaking into the gap of the shaft, the gas pressure in the shaft is equal to the atmospheric pressure. And the shaft gas extraction pipeline is connected with a gas pipe inserted into each gas extraction coal hole, and a gap between the gas pipe and the coal hole is filled with fillers to seal the gas extraction coal hole. The shaft cover plate is provided with a differential pressure gauge for detecting the pressure difference between the gas pressure in the shaft and the atmospheric pressure, and the differential pressure gauge is connected with an electromagnetic valve on a shaft gas injection pipeline. And after the gas in the shaft replaces the air, starting a ground gas extraction vacuum pump, and simultaneously pumping the gas in the coal seam and the gas in the shaft into a gas extraction coal hole. And meanwhile, a gas injection pipeline of the shaft is opened, and gas is injected into the shaft. So as to supplement the gas pumped into the gas extraction coal hole in the shaft. The reading of the differential pressure meter automatically regulates and controls a shaft gas injection pipeline, increases and decreases gas injection flow, keeps the reading of the differential pressure meter at zero differential pressure, keeps the air pressure in the shaft constantly equal to atmospheric pressure, and blocks air in the atmosphere from leaking into the shaft from a crack of the shaft, so that gas extraction of gas pressure in the shaft and the like is formed.
By implementing the invention, personnel can enter the shaft to perform personalized management on gas extraction of each niche in the gas extraction process, and the cover plate of the opened shaft can be removed. The open-barrel gas extraction pipeline, the niche gas pipes and the gas pipes in the niche are sequentially connected, and a gap between each gas pipe and the coal hole wall is filled with filler to seal the gas extraction coal hole. A niche sealing wall is arranged in the niche, an equal-pressure coal roadway is arranged from the niche sealing wall to the end part of the niche, and each gas pipe is connected with the niche gas pipe in the equal-pressure coal roadway. The niche gas injection pipe inserted into the equal-pressure coal roadway is connected with a shaft gas injection pipeline. On each closed wall, there is a differential pressure meter for detecting the difference between the air pressure in the coal roadway and the air pressure in the shaft, and the differential pressure meter is communicated with the electromagnetic valve on the niche gas injection pipe. And opening the niche gas pipe and the niche gas injection pipe, reading the reading regulating electromagnetic valve by the pressure difference meter, automatically increasing and decreasing the gas injection flow, keeping the reading of the pressure difference meter at zero pressure difference, keeping the air pressure in the equal-pressure coal road to be constantly equal to the air pressure of the shaft, and blocking the gas communication between the equal-pressure coal road and the shaft to form the gas extraction of the gas and the like in the niche.
By implementing the invention, in order to expand the mining range of the shaft, the parking lot rock lane, the equal-pressure airtight wall, the equal-pressure rock lane, the water retaining wall and the upward rock lane which penetrates through the bottom of each coal seam and is filled with water are sequentially connected with the gas extraction coal lane in each coal seam and a plurality of parallel gas extraction coal holes at two sides of the gas extraction coal lane. Along the whole length of each gas extraction coal road, a gas injection pipe is communicated with a shaft gas injection pipeline in the shaft. And a rock roadway exhaust pipe is arranged in the upward rock roadway and is connected with the exhaust pipe in the shaft. And a rock roadway gas extraction pipe is arranged in the upward rock roadway and is connected with a shaft gas extraction pipeline in the shaft. And simultaneously opening a gas injection pipe and a rock roadway exhaust pipe, and closing the rock roadway exhaust pipe after gas is replaced by air in the upward rock roadway and the gas extraction coal roadway. And opening a rock roadway gas extraction pipe, and sequentially pumping gas in the coal seam into a gas extraction coal hole, a gas extraction coal roadway, an upward rock roadway, the rock roadway gas extraction pipe, a shaft gas extraction pipeline and a ground gas extraction vacuum pump.
The invention needs to prevent the concrete support of the wall of the well bore from deforming to generate cracks and air leakage. And welding a steel plate shaft in the middle of the thickness of the concrete shaft wall.
THE ADVANTAGES OF THE PRESENT INVENTION
Provides a new technology for exploiting the coal bed gas of the original coal field.
Drawings
FIG. 1 is a cross-sectional view of a shaft for extracting pure gas
In the figure, 1 is the ground, 2 is the coal seam, 3 is the shaft cover plate, 4 is the shaft, 5 is the drilling site niche, 6 is the gas extraction coal hole, 7 is the ground air extractor, 8 is the exhaust tube, 9 is the well pipe gas injection pipeline, 10 is the ground gas extraction vacuum pump, 11 is the shaft gas extraction pipeline, 12 is the ground gas user pipeline, 13 is the sump, 14 is the drain pipe, 15 is the pump-unit kowtow pump.
FIG. 2 is a niche diagram of a shaft gas negative pressure closed wall gas extraction drilling site
In the figure, 2 is a coal seam, 4 is a shaft, 6 is a gas extraction coal hole, 11 is a shaft gas extraction pipeline, 19 is an equal-niche wall closed wall, 20 is a niche coal roadway, 21 is a niche gas pipe, and 22 is an electromagnetic valve.
FIG. 3 is a cross-sectional view of a cover plate of a water sealed ring shaft
In the figure, 4 is a shaft, 16 is a steel plate shaft, and 17 is a circular water tank filled with water; 18 is a steel plate shaft cover plate, and 20 is a circular ring insert plate.
FIG. 4 is a cross-sectional view of a stationary wellbore cover plate
In the figure, 4 is a shaft, 16 is a steel plate shaft, 18 is a steel plate well cover, and 21 is a welding electrode cadmium pile.
FIG. 5 is a sectional view of a gas extraction niche structure for gas in a shaft
In the figure, 2 is a coal seam, 4 is a shaft, 5 is a niche, 6 is a coal hole, 9 is a shaft gas injection pipe, 11 is a shaft gas extraction pipeline, 22 is a gas pipe, and 23 is filling.
FIG. 6 is a perspective view of a gas extraction niche for gas in the niche
In the figure, 2 is a coal seam, 4 is a shaft, 5 is a niche, 6 is a gas extraction coal hole, 9 is a shaft gas injection pipeline, 11 is a shaft gas extraction roadway, 19 is an equal-pressure sealing wall, 20 is an equal-pressure coal roadway, 22 is a gas pipe, and 23 is a filling material. 24 is a niche gas pipe, and 25 is a niche gas injection pipe.
FIG. 7 cross-sectional view of closed gas extraction in roadway and rock roadway of parking lot
In the figure, 4 is a shaft, 8 is an extraction pipe, 9 is a shaft gas injection pipeline, 11 is a shaft gas extraction pipeline, 25 is a parking lot rock lane, 26 is an equal-pressure closed wall, 27 is an equal-pressure rock lane, 28 is a retaining wall, 29 is an upward rock lane, 30 is a gas extraction coal lane, 31 is a gas extraction coal hole, 32 is a shaft gas extraction pipeline extension pipeline, 33 is a rock lane gas injection pipe, 34 is a shaft gas injection pipeline extension pipe, and 35 is an extraction pipe extension pipe.
Detailed Description
And defining a well field in the coal bed gas production coal bed range, dividing the well field into a plurality of pure gas extraction mineshafts, and replacing construction and successive production by the mineshafts. Wherein, the well is first mined at the center of the well field, and a gas extraction vacuum pump is built on the ground and is respectively connected with each well by a ground pipeline for each well to be used by each well.
Claims (10)
1. The shaft of pure gas is taken out and drawn out, the gas that each coal seam of coal seam group contains is taken out simultaneously and is produced the coal seam gas, characterized by: the shaft cover plate and the shaft penetrating through each coal seam of the coal seam group are sequentially connected with the drilling site niches in each coal seam and a plurality of gas extraction coal holes in each coal seam, and the hole opening sections of the coal holes are supported by sieve pipes; an air exhaust pipe connected with a ground air pump is inserted into the top of the shaft; the shaft gas injection pipeline is as long as the shaft, a gas user pipe network is connected to the ground, and an electromagnetic valve is arranged on the shaft gas injection pipeline; starting an air extractor, and pumping air reserved in the shaft from the upper part of the shaft; simultaneously, a gas injection pipeline of the shaft is opened, and gas with equal flow is injected into the shaft from the bottom of the shaft to replace air; a shaft gas extraction pipeline connected with the ground gas extraction vacuum pump is inserted into the shaft; closing the ground air extractor and the shaft gas injection pipeline, starting a ground gas extraction vacuum pump, and pumping gas in each coal seam into a gas extraction coal hole, a drill site niche, a shaft gas extraction pipeline and the ground gas extraction vacuum pump in sequence and discharging the gas into a gas user pipe network; and the gas pressure in the shaft is equal to the negative pressure at the shaft gas extraction pipeline opening, which is less than the ground atmospheric pressure, so that shaft gas negative pressure extraction is formed.
2. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of a coal seam group to produce coal seam gas, and is characterized in that: sealing walls are arranged in niches of the drilling sites to seal the gas extraction coal holes; a niche coal roadway is arranged between the closed wall and the end part of the niche of the drilling site; the niche gas pipe inserted into the niche coal roadway is provided with an electromagnetic valve, and a power supply lead and a control lead of the electromagnetic valve are communicated with the ground; in the stage of gas replacing air in the shaft, the electromagnetic valve closes the niche gas pipe; when the shaft gas extraction pipeline extracts gas, the electromagnetic valve opens the niche gas pipe, gas in the coal seam is sequentially pumped into the gas extraction coal hole, the niche coal roadway, the niche gas pipe, the shaft gas extraction pipeline and the ground gas extraction pump, and shaft gas negative pressure closed wall type gas extraction is formed.
3. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: the shaft is connected with a circular water tank with the diameter equal to that of the shaft on the ground, and the circular water tank is filled with water; one surface of the lower part of the shaft cover plate is connected with a circular ring plugboard with the diameter equal to that of the shaft; the circular ring inserting plate is inserted into the circular ring water tank, the end part of the circular ring inserting plate is contacted with the bottom of the circular ring water tank, and the height value of the circular ring water tank and the circular ring inserting plate in a meter unit is larger than the negative pressure value in a shaft in a meter water column unit. Forming a circular water seal cover plate.
4. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: the shaft is a shaft wall made of concrete, and a steel plate shaft is embedded in the middle of the wall thickness of the shaft wall; the diameter of the circular steel plate shaft cover plate is equal to that of the steel shaft, and the circumferential edge of the circular steel plate shaft cover plate is welded and fixed with the top edge of the steel plate shaft.
5. The shaft for extracting pure gas as claimed in claims 1 and 2, which is used for extracting gas contained in each coal seam of a coal seam group to produce coal seam gas, and is characterized in that: elastic rubber, a steel plate cover plate and a heavy object are sequentially covered above the steel plate shaft to form a semi-fixed shaft cover plate.
6. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: the shaft penetrates through the coal seam at the lowest part of the coal seam group and is connected with a car yard rock roadway and a water sump rock roadway in a bottom plate rock layer of the coal seam group; the shaft drain pipe is connected with the water sump rock lane and the ground oil pumping machine cracking head pump.
7. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: inserting a gas pipe into each gas extraction coal hole in the shaft, wherein a gap between the gas pipe and the coal hole is filled with filling materials; each gas pipe is connected with a shaft gas extraction pipeline, and a flowmeter and a gas concentration meter are arranged on the shaft gas extraction pipeline; starting a ground gas extraction vacuum pump, and sequentially pumping gas of each coal seam into a gas extraction coal hole, a gas pipe, a shaft gas extraction pipeline and the ground gas extraction vacuum pump; meanwhile, air retained in the shaft is pumped into the gas extraction coal hole along the coal seam gas leakage crack and mixed with gas; the reading of the flowmeter and the gas concentration meter can calculate the leakage flow of air leaking into the gas coal hole; closing a shaft gas extraction pipeline, replacing air reserved in a shaft with gas, closing a ground exhaust fan, and setting an electromagnetic valve on a shaft gas injection pipeline to enable gas injection flow in the pipe to be equal to gas leakage flow; starting a ground gas extraction vacuum pump, and entering gas extraction; the well casing cover plate is provided with a differential pressure gauge for detecting the pressure difference between the gas pressure in the shaft and the ground atmospheric pressure, the differential pressure gauge is connected with an electromagnetic valve on a gas injection pipeline of the shaft, the reading of the differential pressure gauge controls the electromagnetic valve to increase or decrease the gas injection flow, the gas pressure in the shaft is kept to be constantly equal to the ground atmospheric pressure, the air is blocked from leaking into the shaft, and the gas extraction of the gas with the gas pressure in the shaft and the like is formed.
8. The shaft for extracting pure gas as claimed in claims 1 and 2, which is used for extracting gas contained in each coal seam of a coal seam group to produce coal seam gas, and is characterized in that: the shaft gas extraction pipeline, the niche gas pipes of the niches and the gas pipes inserted into the gas extraction coal holes in the niches are sequentially connected, and gaps between the gas pipes and the coal hole walls are filled with fillers; removing the shaft cover plate; niche sealing walls are arranged in niches of drilling sites in the shaft and used for sealing gas pipes, and equal-pressure coal roadways are formed from the niche sealing walls to the ends of the niches; inserting niche gas injection pipes of all equal-pressure coal roadways, connecting shaft gas injection pipelines, and arranging electromagnetic valves on the niche gas injection pipes; each niche closed wall is provided with a differential pressure gauge for detecting the difference between the air pressure in the shaft and the air pressure in the equal-air-pressure coal roadway, and the differential pressure gauge is connected with an electromagnetic valve on a niche gas injection pipe; and opening the wall box gas pipe and the niche gas injection pipe, reading and controlling an electromagnetic valve on the niche gas injection pipe by a pressure difference meter, increasing and decreasing the gas injection flow of the niche gas injection pipe into the equal-pressure coal roadways, keeping the gas pressure in each equal-pressure coal roadway constantly equal to the gas pressure in the shaft, and blocking the gas communication between the shaft and the equal-pressure coal roadways to form the equal-pressure gas extraction of the gas in the niche.
9. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: the pit shaft, the train yard rock roadway, the train yard airtight wall, the equal-air pressure rock roadway, the water retaining wall and the upward rock roadway which penetrates through the bottom of each coal seam and is filled with water are sequentially connected with the gas extraction coal roadway in each coal seam and the plurality of gas extraction coal holes in the coal seam; the gas pipes of the gas extraction coal holes are sequentially connected with gas extraction pipes, shaft gas extraction pipelines and a ground gas extraction vacuum pump in a gas extraction coal roadway, and gaps between the gas pipes and the coal holes are filled with fillers; a rock roadway gas injection pipe inserted into the equal-pressure rock roadway is connected with a shaft gas injection pipeline, and an electromagnetic valve is arranged on the rock roadway gas injection pipe; the isobaric rock roadway is connected with a plurality of rock holes in the peripheral rock layer; a shaft gas injection pipeline extending pipeline is arranged along the whole length of the gas extraction coal roadway; a shaft exhaust pipe extension pipe is arranged in the upward rock roadway; simultaneously opening a shaft gas injection pipeline extension pipe and an exhaust pipe extension pipe, and replacing gas by gas to extract air in a coal roadway; closing the extension pipe of the extraction pipe, opening the gas extraction pipe, and entering gas extraction; and a pressure difference meter for detecting the difference between the air pressure of the equal-air-pressure rock roadway and the air pressure in the shaft is arranged on the closed wall of the parking lot, the pressure difference meter is connected with an electromagnetic valve on a rock roadway gas injection pipe, the electromagnetic valve is regulated and controlled by reading of the pressure difference meter, the gas injection flow of the rock roadway gas injection pipe is increased and decreased, the air pressure in the equal-air-pressure rock roadway and the air pressure in the shaft are kept equal, and the closed gas extraction of the parking lot rock roadway is formed.
10. The shaft for extracting pure gas as claimed in claim 1, which is used for extracting gas contained in each coal seam of the coal seam group to produce coal seam gas, and is characterized in that: and a well field for defining the range of the coal seam for extracting the gas is divided into a plurality of shafts for extracting the pure gas, wherein the center of the well field is the first mining, a gas extraction vacuum pump is built on the ground and communicated with each shaft, and each shaft is constructed and produced instead.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289006.5A CN112780334A (en) | 2021-03-18 | 2021-03-18 | Shaft for extracting pure gas |
| PCT/CN2022/070256 WO2022193802A1 (en) | 2021-03-18 | 2022-01-05 | Wellbore for pure gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289006.5A CN112780334A (en) | 2021-03-18 | 2021-03-18 | Shaft for extracting pure gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112780334A true CN112780334A (en) | 2021-05-11 |
Family
ID=75762711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110289006.5A Pending CN112780334A (en) | 2021-03-18 | 2021-03-18 | Shaft for extracting pure gas |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112780334A (en) |
| WO (1) | WO2022193802A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837646A (en) * | 2022-05-05 | 2022-08-02 | 中联煤层气国家工程研究中心有限责任公司 | A device is adopted altogether to multilayer for coal bed gas exploitation |
| WO2022193802A1 (en) * | 2021-03-18 | 2022-09-22 | 柴兆喜 | Wellbore for pure gas extraction |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2913612Y (en) * | 2005-05-09 | 2007-06-20 | 柴兆喜 | Well bore enclosed type coal bed air extraction well |
| CN101122217A (en) * | 2007-09-19 | 2008-02-13 | 中国科学院武汉岩土力学研究所 | Down-hole pump drainage laneway exploitation system for mixing gas dispelling coal gas, and the method |
| CN103670338B (en) * | 2012-09-21 | 2016-06-15 | 新奥气化采煤有限公司 | A kind of coal bed gas and coal mining method altogether |
| CN104989406A (en) * | 2015-07-07 | 2015-10-21 | 柴兆喜 | Shale gas mine mining shale gas under negative pressure |
| CN107420126B (en) * | 2017-07-26 | 2024-03-29 | 柴兆喜 | Pressure equalizing circulation mine gas extraction system |
| CN111472832B (en) * | 2020-04-09 | 2021-01-15 | 中国矿业大学 | Coal bed gas self-circulation gas injection yield increasing method |
| CN112780334A (en) * | 2021-03-18 | 2021-05-11 | 柴兆喜 | Shaft for extracting pure gas |
-
2021
- 2021-03-18 CN CN202110289006.5A patent/CN112780334A/en active Pending
-
2022
- 2022-01-05 WO PCT/CN2022/070256 patent/WO2022193802A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193802A1 (en) * | 2021-03-18 | 2022-09-22 | 柴兆喜 | Wellbore for pure gas extraction |
| CN114837646A (en) * | 2022-05-05 | 2022-08-02 | 中联煤层气国家工程研究中心有限责任公司 | A device is adopted altogether to multilayer for coal bed gas exploitation |
| CN114837646B (en) * | 2022-05-05 | 2023-11-24 | 中联煤层气国家工程研究中心有限责任公司 | Multilayer co-mining device for coal bed gas mining |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022193802A1 (en) | 2022-09-22 |
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