CN108533223A - A kind of underground goaf residual coal bed gas methane drainage and utilization project system - Google Patents
A kind of underground goaf residual coal bed gas methane drainage and utilization project system Download PDFInfo
- Publication number
- CN108533223A CN108533223A CN201810143840.1A CN201810143840A CN108533223A CN 108533223 A CN108533223 A CN 108533223A CN 201810143840 A CN201810143840 A CN 201810143840A CN 108533223 A CN108533223 A CN 108533223A
- Authority
- CN
- China
- Prior art keywords
- drainage tube
- coal bed
- bed gas
- drainage
- goaf
- 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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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
Abstract
A kind of underground goaf residual coal bed gas methane drainage and utilization project system and method, the high gas layer underground goaf for being suitable for various inclination angles remain coal bed gas extraction.It is vertically penetrated through from ground to main air return lane a bite ground drilling of constructing to air return lane, and is inserted into drainage tube I in constructed drilling well.After back production, in goaf close to the pre-buried drainage tube II in air return lane side, slot is set on it and protects slot with grillage.Connect drainage tube I and drainage tube II.Water ring vacuum pump, screw rod booster pump and adsorption tower are installed successively in ground drilling well head, to make the residual coal bed gas in underground goaf through drainage tube I and drainage tube II by extraction to ground, and coal seam gas concentration is improved by adsorption tower, realize the methane drainage and utilization project to remaining coal bed gas in underground goaf.Present invention reduces fire damp accidents.This method has the advantages that low power consuming, high-effect, easy easy implementation, while can produce huge economic benefit.
Description
Technical field
The present invention relates to a kind of underground goafs to remain coal bed gas methane drainage and utilization project system, is particularly suitable for the height at various inclination angles
Gassy seam underground goaf remains coal bed gas extraction.
Background technology
Coal in China exploitation is mostly underground work, and mine gas content is generally higher.It is formed after working face in the pit back production
Goaf, the something lost coal and coal column being scattered in these goafs can gradually desorb a large amount of methane gas.Methane is the master of coal bed gas
Ingredient is wanted, it is a kind of clean energy resource, can be used as automobile fuel gas, Domestic Gas and as power generation etc..It takes out at this stage in China
The method for adopting underground goaf residual coal bed gas is mainly the pipe laying in the conventional extraction coal bed gas of underground goaf arrangement.But often
The extraction range for advising pipe laying method is small, residual coal bed gas that cannot effectively in extraction goaf.
Invention content
It is an object of the present invention to overcome the shortcoming in prior art, it is mined out to provide a kind of efficient underground of extraction
Area remains coal bed gas methane drainage and utilization project system.It is passed through first from ground to the vertical construction ground drilling well of main air return lane with main air return lane
It is logical, then the drainage tube for being inserted into ground drilling is connect with the drainage tube being inserted into goaf, then by pacifying successively in well head
Dress water ring vacuum pump, screw rod booster pump and adsorption tower are to realize the methane drainage and utilization project to remaining coal bed gas in underground goaf.
Steps are as follows for the technical solution adopted by the present invention to solve the technical problems：
A. drilling well is made to be passed through with main air return lane to the ground drilling of the main a diameter of 113-155mm of air return lane vertical construction from ground
It is logical；
B. the casing that earthward a diameter of 110-152mm is inserted into drilling well is used in combination cement close to ground drilling bottom 15-20cm is exceeded
Space between feud face borehole bottom and casing forms sealing of hole sections I；
C. the space between cement seal ground drilling top and casing is used, sealing of hole sections II are formed；
D. it is inserted into the drainage tube I of a diameter of 108-150mm into casing and fixes；
E. in the drainage tube II of pre-buried a diameter of 108-150mm at air return lane 3-5m；
F., the slot that length is 30-50cm is set on drainage tube II, and slot is protected using grillage；
G. drainage tube I is connect with drainage tube II with ring flange；
H., first valve is set at the well head of ground drilling, the second valve is set in drainage tube I and II junction of drainage tube,
And close the first valve and the second valve；
I. water ring vacuum pump, screw rod booster pump and adsorption tower are installed successively in well head, open the first valve and the second valve.
Beneficial effects of the present invention：
（1）It is poor in the underground goaf small extracting result of routine pipe laying pumping method extraction coal bed gas range to solve the problems, such as.Pole
The earth improves extracting result, is easy to promote and apply at the scene.
（2）Using surface-mounted water ring vacuum pump and screw rod booster pump, efficiently will by drainage tube I and drainage tube II
Residual coal bed gas extraction in underground goaf, and coal seam gas concentration is improved by adsorption tower, it is simple for process, safe and reliable.
Description of the drawings
Fig. 1 is the schematic diagram of embodiment of the present invention.
In figure：1, ground, 2, ground drilling, 3, main air return lane, 4, casing, 5, cement, 6, sealing of hole sections I, 7, sealing of hole sections II,
8, drainage tube I, 9, goaf, 10, air return lane, 11, drainage tube II, 12, slot, 13, grillage, 14, ring flange, 15, well head,
16, the first valve, the 17, second valve, 18, water ring vacuum pump, 19, screw rod booster pump, 20, adsorption tower.
Specific implementation mode
The example of the present invention is further illustrated below in conjunction with the accompanying drawings：
As shown, first from ground 1 to the ground drilling 2 of a diameter of 113-155mm of 3 vertical construction of main air return lane, be allowed to
Main air return lane 3 penetrates through.And then the casing 4 of a diameter of 110-152mm is earthward inserted into drilling well 2 to beyond 2 bottom of ground drilling
Portion 15-20cm is used in combination cement 5 to seal the space between 2 bottom of ground drilling and casing 4, forms sealing of hole sections I 6.It is close with cement 5
The space between 2 top of ground drilling and casing 4 is sealed, sealing of hole sections II 7 are formed.Then a diameter of 108- is inserted into casing 4
The drainage tube I 8 of 150mm is simultaneously fixed.It is being first pre-buried a diameter of 108- at 3-5m at a distance from air return lane 10 in goaf 9
The drainage tube II 11 of 150mm.And the slot 12 that length is 30-50cm is set on drainage tube II 11, slot is protected using grillage 13
Shield.And then drainage tube I 8 is connect with the ring flange 14 of drainage tube II 11, the first valve is set at the well head 15 of ground drilling 2
Door 16 is arranged the second valve 17 in drainage tube I 8 and II 11 junction of drainage tube, and closes the first valve 16 and the second valve 17.
Then water ring vacuum pump 18, screw rod booster pump 19 and adsorption tower 20 are installed successively in well head 15, open the first valve 16 and second
Valve 17 can realize the residual coal bed gas in efficient extraction goaf 9.
Claims (5)
1. a kind of underground goaf remains coal bed gas methane drainage and utilization project system, it is characterised in that including drilling machine, it is characterized in that drilling machine to
Surface drilling（2）, drill and main air return lane（3）Perforation；Casing（4）It is arranged in drilling well（2）It is interior, drilling well（2）With casing（4）Between
Pass through cement seal；Drainage tube I（8）In the plug-in-sleeve of one end and be embedded in goaf（9）Drainage tube II（11）Pass through
Two valves（17）Connection, drainage tube I（8）The other end is located at ground and is sequentially connected the first valve（16）, water ring vacuum pump（18）、
Screw rod booster pump（19）, adsorption tower（20）.
2. a kind of underground goaf according to claim 1 remains coal bed gas methane drainage and utilization project system, it is characterised in that coal seam
Gas pumping method includes the following steps：
A. from ground（1）To main air return lane（3）Vertical construction ground drilling（2）, it is allowed to and main air return lane（3）Perforation；
B. earthward drilling well（2）Plug-in-sleeve（4）, cement is used in combination（5）Seal ground drilling（2）Bottom and casing（4）Between
Space forms sealing of hole sections I（6）；
C. cement is used（5）Seal ground drilling（2）Top and casing（4）Between space, formed sealing of hole sections II（7）；
D. to casing（4）Interior insertion drainage tube I（8）And it is fixed；
E. in goaf（9）Close to air return lane（10）The pre-buried drainage tube in side II（11）；
F. in drainage tube II（11）Upper setting slot（12）；
G. slot（12）Using grillage（13）Protection；
H. by drainage tube I（8）With drainage tube II（11）Use ring flange（14）Connection；
I. in ground drilling（2）Well head（15）The first valve of place's setting（16）, in drainage tube I（8）With drainage tube II（11）Even
Connect the second valve of place's setting（17）, and close the first valve（16）With the second valve（17）；
J. in well head（16）Water ring vacuum pump is installed successively（18）, screw rod booster pump（19）And adsorption tower（20）, open the first valve
Door（16）With the second valve（17）, realize efficient extraction goaf（9）Interior residual coal bed gas.
3. a kind of system of underground goaf residual coal bed gas methane drainage and utilization project according to claim 1, it is characterised in that institute
State ground drilling（2）A diameter of 113-155mm, casing（4）A diameter of 110-152mm.
4. a kind of system of underground goaf residual coal bed gas methane drainage and utilization project according to claim 1, it is characterised in that take out
Adopt pipe I（8）With drainage tube II（11）Diameter be 108-150mm.
5. a kind of system of underground goaf residual coal bed gas methane drainage and utilization project according to claim 1, it is characterised in that take out
Adopt pipe II（11）With air return lane（10）Distance be 3-5m, slot（12）Length is 30-50cm, adjacent slot（12）Spacing be
30-50m。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143840.1A CN108533223B (en) | 2018-02-12 | 2018-02-12 | Residual coal bed gas extraction and utilization system in underground goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143840.1A CN108533223B (en) | 2018-02-12 | 2018-02-12 | Residual coal bed gas extraction and utilization system in underground goaf |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108533223A true CN108533223A (en) | 2018-09-14 |
| CN108533223B CN108533223B (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810143840.1A Active CN108533223B (en) | 2018-02-12 | 2018-02-12 | Residual coal bed gas extraction and utilization system in underground goaf |
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| Country | Link |
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| CN (1) | CN108533223B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113669004A (en) * | 2021-08-11 | 2021-11-19 | 中国煤炭地质总局水文地质局 | Coal bed gas control method |
| CN113803104A (en) * | 2021-09-29 | 2021-12-17 | 太原理工大学 | Upper mining area pipe burying and downward drilling integrated arrangement and full-period gas extraction method |
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Cited By (3)
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|---|---|---|---|---|
| CN113669004A (en) * | 2021-08-11 | 2021-11-19 | 中国煤炭地质总局水文地质局 | Coal bed gas control method |
| CN113803104A (en) * | 2021-09-29 | 2021-12-17 | 太原理工大学 | Upper mining area pipe burying and downward drilling integrated arrangement and full-period gas extraction method |
| CN113803104B (en) * | 2021-09-29 | 2023-07-28 | 太原理工大学 | Method for integrally arranging upper mining area buried pipe and downward drilling and extracting full-period gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108533223B (en) | 2020-09-11 |
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