CN106930733A - Coal bed gas group wells extraction system and method for construction - Google Patents
Coal bed gas group wells extraction system and method for construction Download PDFInfo
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- CN106930733A CN106930733A CN201710326108.3A CN201710326108A CN106930733A CN 106930733 A CN106930733 A CN 106930733A CN 201710326108 A CN201710326108 A CN 201710326108A CN 106930733 A CN106930733 A CN 106930733A
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- bed gas
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- 239000003245 coal Substances 0.000 title claims abstract description 119
- 238000000605 extraction Methods 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005065 mining Methods 0.000 claims abstract description 44
- 239000002352 surface water Substances 0.000 claims abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 81
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a kind of coal bed gas group wells extraction system and method for construction.Coal bed gas group wells extraction system includes that chamber is expanded in connection, and connection is expanded chamber and is arranged in coal seam；Each surface water horizontal well includes the horizontal segment and vertical inclination section that are connected, and the end of horizontal segment is expanded chamber and is connected with connection, and the end of vertical inclination section is all extended on ground；Multiple horizontal segments are respectively positioned in coal seam；The first end of suction channel expands chamber and is connected with connection, and the second end of suction channel is used to export coal bed gas, and the second end of suction channel wears out and extend on ground from tunnel, and the section of tubing that suction channel is located in tunnel is negative-pressure pipeline.The method of construction of coal bed gas group wells extraction system is used to build coal bed gas group wells extraction system.Coal bed gas group wells extraction system and method for construction that the present invention is provided, increased the limit of mining of coal bed gas, reduce energy consumption, reduce the extraction cost of coal bed gas, reduce surface construction expense, reduce laying and the operation and maintenance cost of drilling well.
Description
Technical field
The present invention relates to Coal-seam Gas Recovery Technologies field, more particularly to a kind of coal bed gas group wells extraction system and method for construction.
Background technology
Coal bed gas is commonly called as gas, is unconventional natural gas, and coal seam is both the production source rock of coal bed gas, is again coal bed gas
Reservoir, generally requires special extraction technology and goes out coal bed gas extraction.
In the prior art, coal bed gas is typically using straight well extraction, the U-shaped connected well extraction of cluster well extraction and ground etc.
Technology is exploited, and the production technique of above-mentioned mineral diagram has the following disadvantages：First, coal bed gas during exploitation,
Needs are separately provided aspirator and coal bed gas are extracted on ground, improve the suction cost of coal bed gas, increased energy consumption；
Second, the pipe network system and auxiliary facility of laying transport coal bed gas are needed on ground, increased surface construction expense；3rd, ore deposit
Extraction well in well area can only extract the coal bed gas of extraction well region, and extraction scope is limited, and reduces coal bed gas whole
The efficiency of body extraction；4th, the extraction well of multiple coal bed gas is arranged in pit zone, multiple extraction wells are each equipped with a set of gas production
Device, causes the wasting of resources, further increases the cost of winning of coal bed gas.
Therefore, it is necessary to solve above-mentioned technical problem.
The content of the invention
The present invention provides a kind of coal bed gas group wells extraction system and method for construction, to solve to be asked present in prior art
Topic, increases the limit of mining of coal bed gas, and reducing energy consumption reduces the extraction cost of coal bed gas, reduces surface construction expense, reduces and bore
The laying of well and operation and maintenance cost, improve extraction efficiency.
The invention provides a kind of coal bed gas group wells extraction system, including：Connection for gathering coal bed gas from coal seam
Expand chamber, the connection is expanded chamber and is arranged in the coal seam；Many mouthfuls of surface water horizontal wells, each described surface water horizontal well includes being connected
The horizontal segment and vertical inclination section for connecing, the end of each horizontal segment are expanded chamber and are connected with the connection, and each is described perpendicular
The end of straight inclination section is all extended on ground；Multiple horizontal segments are respectively positioned in the coal seam；Suction channel, the suction
The first end of pipeline expands chamber and is connected with the connection, and the second end of the suction channel is used to export coal bed gas, the suction
Second end of pipeline wears out and extends on ground from tunnel, and the suction channel is located at the section of tubing in the tunnel
It is negative-pressure pipeline.
Alternatively, the suction channel includes the extraction pipeline and mining pipeline that are connected, the end of the extraction pipeline
Expand chamber with the connection to be connected；The mining pipeline is laid along the bearing of trend in the tunnel, and the mining pipeline is negative pressure
Pipeline, the end of the mining pipeline to extend to be used on ground and exports the coal bed gas.
Alternatively, multiple horizontal segments are the horizontal segment in same level, and multiple horizontal segments
Identical length is same.
Alternatively, the angle all same between two horizontal segments of arbitrary neighborhood.
Alternatively, negative suction system, the mining pipeline and the negative suction system phase are provided with the tunnel
Connection.
Alternatively, mining pipeline is stated to be fixed on the wall in the tunnel.
Alternatively, the coal bed gas group wells extraction system also includes mining straight well, and the head end of the mining straight well is opened in
On ground, the end of the mining straight well is expanded chamber and is connected with the connection, and the head end of the mining straight well is located at the connection
Expand the surface in chamber.
Alternatively, screen casing is provided with the extraction pipeline, the end of the screen casing is expanded chamber and is connected with the connection, institute
The head end for stating screen casing is connected with the mining pipeline.
Alternatively, the coal bed gas group wells extraction system also includes gas collecting apparatus, and the second end of the suction channel connects
There is the gas collecting apparatus.
Based on same inventive concept, the invention provides a kind of method of construction of coal bed gas group wells extraction system, including with
Lower step：S1. planned according to development, determine that the coordinate in chamber is expanded in connection in the coal seam for store coal bed gas, and be drilled with
Go out the connection and expand chamber；S2. many mouthfuls of well locations of surface water horizontal well are chosen on the ground, and surface water horizontal well each described is determined
Vertical inclination section is drilled with to deflecting, the end of each vertical inclination section is respectively positioned on ground, each described vertical deflecting
The head end of section is located in the coal seam；S3. it is drilled with the coal seam multiple with the vertical one-to-one level of inclination section
Section, the head end of multiple horizontal segments is connected correspondingly with the head end of multiple inclination sections vertically, the end of multiple horizontal segments
Expand chamber with the connection to be connected；S4. suction channel is laid, the first end of the suction channel is connected expansion chamber phase with described
Connection, the second end of the suction channel is used to export the coal bed gas, and the second end of the suction channel wears from tunnel
Go out and extend on ground, the section of tubing that the suction channel is located in the tunnel is negative-pressure pipeline.
Coal bed gas group wells extraction system and method for construction that the present invention is provided, many mouthfuls of surface water horizontal wells being drilled with can be significantly
Increase the extraction scope of coal bed gas, and coal bed gas in many mouthfuls of surface water horizontal wells can be by the negative pressure in suction channel and tunnel
Pipeline transportation goes out, cost and energy consumption needed for reducing coal-bed gas exploitation, increased the efficiency of extraction, the part pipe of suction channel
Road is arranged on the inside in tunnel, reduces in the construction cost needed for ground laying pipeline, reduces drilling well laying and operation institute
The expense for needing.
Brief description of the drawings
Preferred embodiment in the present invention will be described in detail by accompanying drawing below, it will help understand the purpose of the present invention and excellent
Point, wherein:
The structural representation of the coal bed gas group wells extraction system that Fig. 1 is provided for the preferred embodiment of the present invention.
Fig. 2 is the structural representation of A-A cross sections in Fig. 1.
The flow chart of the method for construction of the coal bed gas group wells extraction system that Fig. 3 is provided for the preferred embodiment of the present invention.
Specific embodiment
Mention in this manual or up, down, left, right, before and after, front, the back side, top, the bottom that may mention etc.
Orientation term is defined relative to the construction shown in each accompanying drawing, and word " interior " and " outward " refer respectively to direction or remote
From the direction of particular elements geometric center, they are relative concepts, it is therefore possible to meeting according to its residing diverse location, difference
Use state and correspondingly changed.So, also these or other orientation term should not be construed to restricted use
Language.
The structural representation of the coal bed gas group wells extraction system that Fig. 1 is provided for the preferred embodiment of the present invention, Fig. 2 is in Fig. 1
The structural representation of A-A cross sections.Wherein figure 2 show a surface water horizontal well 6 in coal bed gas group wells suction system in underground
The structural representation of corresponding extraction system.As shown in Figure 1 to Figure 2, the invention provides a kind of coal bed gas group wells extraction system,
Including：Chamber 1, surface water horizontal well 6 and suction channel 3 are expanded in connection.
Referring to Fig. 1 to Fig. 2, the connection is expanded chamber 1 and is opened in the coal seam for storing coal bed gas, and chamber 1 is expanded in connection
After being drilled with, the coal dust in coal seam pours in the inside that chamber 1 is expanded in connection.The quantity of surface water horizontal well 6 is seven, each institute in Fig. 1
Stating surface water horizontal well 6 includes the horizontal segment 61 and vertical inclination section 62 that are connected, the end of each vertical inclination section 62
In working seam；Multiple horizontal segments 61 are respectively positioned in the coal seam.Coal bed gas near horizontal segment 61 equally can be with
Continuously pour in corresponding horizontal segment 61, the end of each horizontal segment 61 is expanded chamber 1 and is connected with the connection,
Coal bed gas in multiple horizontal segments 61 can be collected to suction channel 3, increased the limit of mining of coal bed gas, improve coal bed gas
Extraction efficiency.It is only a preferred embodiment that wherein the quantity of surface water horizontal well 6 is seven, in actually exploitation work, ground
The quantity of face horizontal well 6 is not limited in seven.
The first end of suction channel 3 expands chamber 1 and is connected with the connection, and the second end of the suction channel 3 is used to export
Coal bed gas, the second end of the suction channel 3 wears out and extends on ground from tunnel 2, and the suction channel 3 is located at institute
It is negative-pressure pipeline to state the section of tubing in tunnel 2.It is collected to second end of the coal bed gas in suction channel 3 by suction channel 3
It is collected on the ground, reduces in the prior art with the energy consumption needed for the technologies such as water drive, reduces laying and the fortune of drilling well
Row maintenance cost, reduces the extraction cost of coal bed gas, reduces surface construction expense.Alternatively, suction channel 3 can include extraction
Pipeline 31 and mining pipeline 32, wherein the end in the drainage tube road 31 is connected with the mining pipeline 32.The mining pipe
Road 32 is laid along the bearing of trend in tunnel 2, i.e. the laying direction of mining pipeline 32 is consistent with the bearing of trend in tunnel 2.The row
Pipeline 32 is adopted for negative-pressure pipeline, the pressure inside mining pipeline 32 is less than the pressure in horizontal segment 61 and extraction pipeline 31, on
The coal bed gas stated in horizontal segment 61 and extraction pipeline 31 is continuously collected to mining pipeline under the swabbing action of negative pressure
In 32, mining pipeline 32 extends to the second end of the end as suction channel 3 on ground.
Alternatively, the inside in tunnel 2 is typically provided with negative suction system and produces suction with the inside in tunnel 2,
The section of tubing that suction channel 3 in the present invention is located in tunnel 2 can set up negative pressure in tunnel 2 on original ventilation shaft
Aspirator transformation is formed, and without laying unnecessary gas pipeline on ground, production cost can be greatly decreased.Wherein suction channel
3 the second end can extend on ground from the entrance in tunnel 2 and be connected with gas collecting apparatus on the ground, and coal bed gas is by suction
Second end of pipeline 3 is collected to the suction of completion coal bed gas in gas collecting apparatus.
Alternatively, negative suction system is connected close at the position at the second end of the suction channel 3, negative-pressure ward dress
Negative pressure value highest place is set to, is conducive to coal bed gas continuously to collect the second of suction channel 3 in the presence of pressure difference
End, is easy to the output of coal bed gas, so that the production efficiency of coal bed gas is significantly increased.
The coal bed gas group wells extraction system that the present invention is provided, many mouthfuls of surface water horizontal wells 6 being drilled with can be significantly increased coal seam
Coal bed gas in the extraction scope of gas, and many mouthfuls of surface water horizontal wells 6 can be by the negative pressure in suction channel 3 in tunnel 2
Pipeline transportation goes out, cost and energy consumption needed for reducing coal-bed gas exploitation, increased the efficiency of extraction, the part of suction channel 3
Pipeline is arranged on the inside in tunnel 2, reduces in the construction cost needed for ground laying pipeline, reduces drilling well laying and runs
Required expense.
Further, multiple horizontal segments 61 are the horizontal segment 61 in same level, and multiple water
The identical length of flat section 61 is same.It is the center of circle that the end of the horizontal segment 61 is located to connect expansion chamber 1, and the length with horizontal segment 61 is
The edge of the circle of radius, the coal bed gas on each periphery of horizontal segment 61 can be poured in inside horizontal segment 61 closer to the distance, and is led to
Cross horizontal segment 61 and suction channel 31 is pumped to the inside of mining pipeline 32, the end of horizontal segment 61 can be made to be located to connect expansion chamber
1 is the center of circle, with the length of horizontal segment 61 as radius in the range of coal bed gas effectively exploited, to improve opening for coal bed gas
Adopt efficiency.
Further, the angle all same between two horizontal segments 61 of arbitrary neighborhood, can further increase
The uniformity of coal bed gas extraction, improves the extraction rate of coal bed gas.Alternatively, the head end of the extraction pipeline 31 and all water
The end of flat section 61 is respectively positioned in same level.The coal bed gas in horizontal segment 61 can be allow to enter under the swabbing action of negative pressure
Enter in extraction pipeline 31, shorten the flow path of coal bed gas, shorten the extraction time of coal bed gas, be conducive to improving extraction effect
Rate.
It is preferred that the mining pipeline 32 is fixed on the wall in the tunnel 2, mining pipeline 32 is effectively prevented by lane
Construction equipment scratch or crowded wound inside road 2, it is ensured that the stability of the structure of mining pipeline 32.
Alternatively, the coal bed gas group wells extraction system also includes mining straight well 5, and the head end of the mining straight well 5 is opened up
On the ground, the end of the mining straight well 5 is expanded chamber 1 and is connected with the connection, and the head end of the mining straight well 5 is positioned at described
The surface in chamber 1 is expanded in connection.The mining straight well 5 is used to be drilled with connection expansion chamber 1, and is used after the completion of connection expansion chamber 1 is drilled with
Expansion chamber drill bit with diameter greater than 0.5m expands chamber 1 to connection carries out reaming, conveniently realizes surface water horizontal well 6, mining straight well 5 and suction
The connection of pipeline 3.
It is preferred that can be provided with screen casing in the extraction pipeline 31, the end of the screen casing connects the expansion phase of chamber 1 with described
Connection, the head end of the screen casing is connected with the mining pipeline 32.Screen casing is arranged on the inwall of extraction pipeline 31, to extraction
Pipeline 31 ensure that into the pure of the coal bed gas of extraction pipeline 31 while playing a supporting role.Similarly, in horizontal segment 61
Screen casing can also be set, effectively to prevent the impurity such as the gravel carried in coal bed gas from carrying out the inside of horizontal segment 61.
The flow chart of the method for construction of the coal bed gas group wells extraction system that Fig. 3 is provided for the present invention.
Fig. 3 is refer to, based on same inventive concept, present invention also offers a kind of construction of coal bed gas group wells extraction system
Method, comprises the following steps：S1. planned according to development, determine that chamber 1 is expanded in connection in the coal seam for store coal bed gas
Position, and it is drilled with out the connection expansion chamber 1；S2. many mouthfuls of well locations of surface water horizontal well 6 are chosen on the ground, to each surface water
Horizontal well 6 is oriented deflecting and is drilled with vertical inclination section 62, the end of each vertical inclination section 62 is respectively positioned on ground, often
The head end of the individual vertical inclination section 62 is located in the coal seam；S3. it is drilled with the coal seam multiple with the vertical deflecting
62 one-to-one horizontal segments 61 of section, make the head end of multiple horizontal segments 61 and the head end one of multiple vertical inclination sections 62
One is correspondingly connected, and the end of multiple horizontal segments 61 is expanded chamber 1 and is connected with the connection；S4. suction channel 3 is laid,
Make the first end of the suction channel 3 expand chamber 1 with the connection to be connected, the second end of the suction channel 3 is used to export coal
Layer gas, the second end of the suction channel 3 wears out and extends on ground from tunnel 2, and the suction channel 3 is located at described
Section of tubing in tunnel 2 is negative-pressure pipeline.
Alternatively, in step s1, can determine that connection is expanded directly over chamber 1 according to development planning region on ground first
Positioned at the position on ground, mining straight well 5 is bored at the position, until bore up at coal seam, then under enter measuring instrument and carry out well
Trajectory parameters are measured, and the coal seam position coordinates for needing to connect is calculated according to oblique side result, and the position coordinates is connection and expands
The accurate position coordinates in chamber 1, is easy to subsequent construction.
It should be noted that many mouthfuls of surface water horizontal wells 6 can be exchanged with the sequence of construction of extraction pipeline 31, and Duo Kou ground
Without sequencing between horizontal well 6, the end of horizontal segment 61 is no more than 0.3m with the site error connected between expansion chamber 1.
The coal bed gas group wells extraction system that the present invention is provided, many mouthfuls of surface water horizontal wells 6 being drilled with can be significantly increased coal seam
Coal bed gas in the extraction scope of gas, and many mouthfuls of surface water horizontal wells 6 can be by the negative pressure in suction channel 3 in tunnel 2
Pipeline transportation goes out, cost and energy consumption needed for reducing coal-bed gas exploitation, increased the efficiency of extraction, the part of suction channel 3
Pipeline is arranged on the inside in tunnel 2, reduces in the construction cost needed for ground laying pipeline, reduces drilling well laying and runs
Required expense.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modifications or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of coal bed gas group wells extraction system, it is characterised in that including：
Chamber is expanded in connection for gathering coal bed gas from coal seam, and the connection is expanded chamber and is arranged in the coal seam；
Many mouthfuls of surface water horizontal wells, each described surface water horizontal well includes the horizontal segment and vertical inclination section that are connected, each institute
The end for stating horizontal segment is connected with the connection expansion chamber, and the end of each vertical inclination section is all extended on ground；
Multiple horizontal segments are respectively positioned in the coal seam；
Suction channel, the first end of the suction channel expands chamber and is connected with the connection, and the second end of the suction channel is used
In output coal bed gas, the second end of the suction channel wears out and extends on ground from tunnel, the suction channel position
In the section of tubing in the tunnel be negative-pressure pipeline.
2. coal bed gas group wells extraction system according to claim 1, it is characterised in that the suction channel includes being connected
Extraction pipeline and mining pipeline, the end of the extraction pipeline with it is described connection expand chamber be connected；The mining pipeline is along institute
The bearing of trend laying in tunnel is stated, the mining pipeline is negative-pressure pipeline, and the end of the mining pipeline extends to and used on ground
In the output coal bed gas.
3. coal bed gas group wells extraction system according to claim 1, it is characterised in that multiple horizontal segments are and are located at
Horizontal segment in same level, and the identical length of multiple horizontal segments is same.
4. coal bed gas group wells extraction system according to claim 3, it is characterised in that two levels of arbitrary neighborhood
Angle all same between section.
5. coal bed gas group wells extraction system according to claim 2, it is characterised in that be provided with negative pressure in the tunnel and take out
Device is inhaled, the mining pipeline is connected with the negative suction system.
6. coal bed gas group wells extraction system according to claim 2, it is characterised in that the mining pipeline is fixed on described
On the wall in tunnel.
7. coal bed gas group wells extraction system according to claim 1, it is characterised in that the coal bed gas group wells extraction system
Also include mining straight well, the head end of the mining straight well is opened up on the ground, and the end of the mining straight well connects expansion with described
Chamber is connected, and the head end of the mining straight well is located at the surface that chamber is expanded in the connection.
8. coal bed gas group wells extraction system according to claim 2, it is characterised in that be provided with sieve in the extraction pipeline
Pipe, the end of the screen casing is expanded chamber and is connected with the connection, and the head end of the screen casing is connected with the mining pipeline.
9. the coal bed gas group wells extraction system according to claim 1-8 any one, it is characterised in that the coal bed gas group
Well extraction system also includes gas collecting apparatus, and the second end of the suction channel is connected with the gas collecting apparatus.
10. a kind of method of construction of coal bed gas group wells extraction system, it is characterised in that comprise the following steps：
S1. planned according to development, determine that the coordinate in chamber is expanded in connection in the coal seam for store coal bed gas, and be drilled with out institute
State connection and expand chamber；
S2. many mouthfuls of well locations of surface water horizontal well are chosen on the ground, and being oriented deflecting to surface water horizontal well each described is drilled with
Vertical inclination section, makes the end of each vertical inclination section be respectively positioned on ground, the head end position of each vertical inclination section
In the coal seam；
S3. it is drilled with the coal seam multiple with the vertical one-to-one horizontal segment of inclination section, the head end of multiple horizontal segments
Head end with multiple inclination sections vertically is connected correspondingly, and the end of multiple horizontal segments is expanded chamber and is connected with the connection
It is logical；
S4. suction channel is laid, the first end of the suction channel is expanded chamber with the connection and is connected, the suction channel
Second end is used to export the coal bed gas, and the second end of the suction channel wears out and extend on ground from tunnel, institute
It is negative-pressure pipeline to state section of tubing of the suction channel in the tunnel.
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| CN201710326108.3A CN106930733A (en) | 2017-05-10 | 2017-05-10 | Coal bed gas group wells extraction system and method for construction |
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| CN201710326108.3A CN106930733A (en) | 2017-05-10 | 2017-05-10 | Coal bed gas group wells extraction system and method for construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109403926A (en) * | 2018-10-31 | 2019-03-01 | 中国神华能源股份有限公司 | Implement the method for the coal bed gas of underground mining multilayer coal in a main entry |
| CN109441404A (en) * | 2018-10-31 | 2019-03-08 | 中国神华能源股份有限公司 | Implement the method for the coal bed gas of underground mining multilayer coal in two main entrys |
| CN109630071A (en) * | 2018-11-30 | 2019-04-16 | 中国神华能源股份有限公司 | Coal bed gas pumping method |
| CN111236891A (en) * | 2020-02-25 | 2020-06-05 | 神华神东煤炭集团有限责任公司 | Coal bed gas extraction method |
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| CN109441404A (en) * | 2018-10-31 | 2019-03-08 | 中国神华能源股份有限公司 | Implement the method for the coal bed gas of underground mining multilayer coal in two main entrys |
| CN109630071A (en) * | 2018-11-30 | 2019-04-16 | 中国神华能源股份有限公司 | Coal bed gas pumping method |
| CN111236891A (en) * | 2020-02-25 | 2020-06-05 | 神华神东煤炭集团有限责任公司 | Coal bed gas extraction method |
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