CN2913612Y - Well bore enclosed type coal bed air extraction well - Google Patents

Well bore enclosed type coal bed air extraction well Download PDF

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Publication number
CN2913612Y
CN2913612Y CN 200520018054 CN200520018054U CN2913612Y CN 2913612 Y CN2913612 Y CN 2913612Y CN 200520018054 CN200520018054 CN 200520018054 CN 200520018054 U CN200520018054 U CN 200520018054U CN 2913612 Y CN2913612 Y CN 2913612Y
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CN
China
Prior art keywords
coal
pit shaft
well
ground
bed gas
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Expired - Lifetime
Application number
CN 200520018054
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Chinese (zh)
Inventor
柴兆喜
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柴兆喜
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Priority to CN 200520018054 priority Critical patent/CN2913612Y/en
Application granted granted Critical
Publication of CN2913612Y publication Critical patent/CN2913612Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a well-bore sealed coal-bed gas mining well for exploitation of coal-bed gas in coal field, and belongs to the field of mining technology. The prior art of mining coal-bed gas by drilling hole from the ground to the coal bed has the problem of failure to exploit gas from the coal bed with less cracks. In order to solve the above problem, the utility model provides a well-bore sealed coal-bed gas mining well which comprises a well bore connected between the ground and the coal bed, a coal roadway inside the coal bed and connected with the well bore, a plurality of pores formed from the coal roadway, and a gas pipe installed inside the well bore to connect the coal roadway with the ground suction pump. The coal roadway is sealed by a well cap inside the well bore, and the coal-bed gas is pumped by the ground suction pump to the ground via the coal pores, coal roadway and gas pipe. In order to discharge the underground water flowing into the sealed coal roadway, a sinking pump for drainage is arranged in a water chamber at the bottom of the well bore, or a pumping unit for drainage is arranged on the ground. The utility model is suitable for the mining of coal-bed gas in oil field of various geologic conditions.

Description

The closed coal bed gas extraction well of pit shaft
Technical field the utility model relates to mine coal Tanaka's coal bed gas, belongs to the mining technique field.
Background technology has the exploiting coal bed methane technology now, for by ground to the coal seam construction drill, have the problem only be applicable to the fracture development coal seam.The purpose of this utility model provides the closed coal bed gas extraction well of a kind of pit shaft, the problem of coal bed gas in the agensis coal seam, crack that the solution prior art is difficult to exploit.
The closed coal bed gas extraction well of summary of the invention the utility model pit shaft mainly is made of the pit shaft that connects ground and coal seam, the coal road in the coal seam of shaft construction, many coal holes in the coal seam of coal road construction.Make up the sealing well lid in the pit shaft, pit shaft is divided into top pit shaft and bottom pit shaft, coal road connects the bottom pit shaft, thereby bottom pit shaft, coal road, coal hole are closed the well lid sealing.The bottom pit shaft is communicated with the ground aspiration pump by the tracheae of being located in the pit shaft of top.During the production coal bed gas, the coal bed gas in the coal seam flows coal inlet, coal road, bottom pit shaft, tracheae successively, is evacuated to ground by the ground aspiration pump.
Implement the utility model, can on the sealing well lid, establish the switch door, so that personnel and material turnover bottom pit shaft and coal road.
Implement the utility model, can in the top pit shaft above the sealing well lid, inject water to increase the air-tightness of bottom pit shaft.
Implement a kind of drainage of the present utility model: establish water pipe along the pit shaft total length, the submersible pump in the one end connected well tube bottom sump, the other end is communicated with ground.
Implement another kind of drainage of the present utility model: establish water pipe along the pit shaft total length, connected well tube bottom sump and ground oil pumper.
Implementing drainage of the present utility model can also be:, established water pipe in the drainage hole and be connected with the oil pumper of being located at ground to the boring of coal seam construction drainage by ground.
Advantage of the present utility model is to have in the coal seam intensive coal hole, can make coal bed gas in the agensis coal seam, crack advance coal inlet and be exploited.Simultaneously, only need to cut off the gas exchange on many coal roads and ground, reduce the down-hole engineering quantity with sealing well lid sealing pit shaft.
Description of drawings
The closed coal bed gas extraction well of accompanying drawing pit shaft structure chart
Among the figure: 1 is ground, and 2 is the coal seam, and 3 is pit shaft, 3-1 is the top pit shaft, and 3-2 is the bottom pit shaft, and 4-1,4-2 are coal road, 5-1,5-2 are the coal hole, and 6 are the sealing well lid, and 7 is tracheae, 8 is the ground aspiration pump, and 9 is the switch door, and 10-1,10-2,10-3 are water pipe, 11 is sump, and 12 is submersible pump, and 13-1,13-2 are oil pumper, 14 are drainage hole, and 15,16 is water.
The specific embodiment
By accompanying drawing as seen, coal road 4-1,4-2 are connected successively with coal hole 5-1,5-2 in the pit shaft 3 in connection ground 1 and coal seam 2, the coal seam 2.Sealing well lid 6 is positioned at pit shaft 3, and absolute altitude is higher than coal road 4-1,4-2.On the sealing well lid 6 switch door 9 is installed.The sealing well lid is top pit shaft 3-1 more than 6, when switch door 9 is closed, but water-filling 15 in it.The sealing well lid is following to be bottom pit shaft 3-2, is connected with ground aspiration pump 8 with the tracheae of being located in the pit shaft 3-1 of top 7.Open ground aspiration pump 8, the coal bed gas in the coal seam 2 are advanced coal inlet 5-1 and 5-2, coal road 4-1 and 4-2, bottom pit shaft 3-2, tracheae 7, ground aspiration pump 8 to ground 1.
Implement the utility model, need to discharge the underground water 16 that pours among bottom pit shaft 3-2 and coal road 4-1, the 4-2.By the visible 3 kinds of drainages of accompanying drawing: the 1st kind, water pipe 10-2 lays along pit shaft 3 total lengths, is communicated with the submersible pump 12 in ground 1 and the wellbore bottom sump 11.The 2nd kind, along the water pipe 10-1 that pit shaft 3 total lengths are laid, connected well tube bottom sump 11 and the oil pumper 13-1 that is located at ground 1.The 3rd kind, the water pipe 10-3 in the drainage hole 14 is connected with the oil pumper 13-2 on ground 1.

Claims (7)

1. the closed coal bed gas extraction well of pit shaft is characterized in that: by constituting from many coal holes of coal road construction in the coal road that is connected pit shaft in the pit shaft that connects ground and coal seam, the coal seam, the coal seam; Pit shaft is divided into top pit shaft and bottom pit shaft by the sealing well lid, and bottom pit shaft and the coal road that is communicated with it are closed the well lid sealing.
2. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: on the sealing well lid switch door is arranged.
3. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: water-filling in the top pit shaft of sealing well lid top.
4. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: bottom pit shaft and the ground aspiration pump of being located at ground are communicated with by the tracheae in the pit shaft of top.
5. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: along the submersible pump in the water pipe connection wellhole of pit shaft total length laying.
6. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: the water pipe of laying along the pit shaft total length connects wellhole and the oil pumper of being located at ground.
7. according to the closed coal bed gas extraction well of the described pit shaft of claim 1, it is characterized in that: the oil pumper of being located at ground connects the interior water pipe of drainage hole.
CN 200520018054 2005-05-09 2005-05-09 Well bore enclosed type coal bed air extraction well Expired - Lifetime CN2913612Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520018054 CN2913612Y (en) 2005-05-09 2005-05-09 Well bore enclosed type coal bed air extraction well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520018054 CN2913612Y (en) 2005-05-09 2005-05-09 Well bore enclosed type coal bed air extraction well

Publications (1)

Publication Number Publication Date
CN2913612Y true CN2913612Y (en) 2007-06-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200520018054 Expired - Lifetime CN2913612Y (en) 2005-05-09 2005-05-09 Well bore enclosed type coal bed air extraction well

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Country Link
CN (1) CN2913612Y (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832149A (en) * 2010-05-20 2010-09-15 太原理工大学 Method for extracting coal seam gas by underground heat injection
CN101915084A (en) * 2010-08-13 2010-12-15 山西晋城无烟煤矿业集团有限责任公司 Process for pumping and exploiting coal bed gas by together using ground well drilling and underground hole drilling
CN101915085A (en) * 2010-08-13 2010-12-15 山西晋城无烟煤矿业集团有限责任公司 Low-air-permeability coal-bed gas extraction method
CN102587959A (en) * 2012-03-13 2012-07-18 华晋煤层气综合利用有限责任公司 Method for draining coal seam gas
CN101498210B (en) * 2008-12-18 2012-11-28 中国石油集团长城钻探工程有限公司 Coal bed gas slim-hole hydraulic jet orienting fracturing yield increasing method
CN103104222A (en) * 2013-02-01 2013-05-15 中北大学 Method for pumping and collecting coal bed gas through combination of ground vertical well and long bedding drill hole
CN104775848A (en) * 2015-01-14 2015-07-15 江西稀有稀土金属钨业集团有限公司 Underground drainage system and method of hard geologic mine
CN106761584A (en) * 2017-02-25 2017-05-31 太原理工大学 Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101498210B (en) * 2008-12-18 2012-11-28 中国石油集团长城钻探工程有限公司 Coal bed gas slim-hole hydraulic jet orienting fracturing yield increasing method
CN101832149B (en) * 2010-05-20 2012-05-30 太原理工大学 Method for extracting coal seam gas by underground heat injection
CN101832149A (en) * 2010-05-20 2010-09-15 太原理工大学 Method for extracting coal seam gas by underground heat injection
CN101915084A (en) * 2010-08-13 2010-12-15 山西晋城无烟煤矿业集团有限责任公司 Process for pumping and exploiting coal bed gas by together using ground well drilling and underground hole drilling
CN101915085A (en) * 2010-08-13 2010-12-15 山西晋城无烟煤矿业集团有限责任公司 Low-air-permeability coal-bed gas extraction method
CN101915084B (en) * 2010-08-13 2011-05-11 山西晋城无烟煤矿业集团有限责任公司 Process for pumping and exploiting coal bed gas by using ground well drilling and underground hole drilling
CN101915085B (en) * 2010-08-13 2011-09-28 山西晋城无烟煤矿业集团有限责任公司 Low-air-permeability coal-bed gas extraction method
CN102587959A (en) * 2012-03-13 2012-07-18 华晋煤层气综合利用有限责任公司 Method for draining coal seam gas
CN102587959B (en) * 2012-03-13 2014-08-20 华晋煤层气综合利用有限责任公司 Method for draining coal seam gas
CN103104222A (en) * 2013-02-01 2013-05-15 中北大学 Method for pumping and collecting coal bed gas through combination of ground vertical well and long bedding drill hole
CN103104222B (en) * 2013-02-01 2015-07-29 中北大学 Ground peupendicular hole combines extraction coal bed gas method with concordant long drilled holes
CN104775848A (en) * 2015-01-14 2015-07-15 江西稀有稀土金属钨业集团有限公司 Underground drainage system and method of hard geologic mine
CN106761584A (en) * 2017-02-25 2017-05-31 太原理工大学 Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CX01 Expiry of patent term

Expiration termination date: 20150509

Granted publication date: 20070620