Title:
METHOD FOR THERMAL-DISPLACEMENT-TYPE STRENGTHENED EXTRACTION IN DRILL HOLE
Document Type and Number:
WIPO Patent Application WO/2016/112759
Kind Code:
A1
Abstract:
A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating, by using a heat pipe (5), coal in the drill hole to form a stable temperature field; and significantly reducing gas adsorption potential by utilizing a heat effect, prompting gas desorption, and strengthening gas extraction. The method enlarges a range of effective pressure relief influence of a single hole, increases an extraction efficiency of gas in a coal seam by more than 40%, is safe, reliable and low-cost, and is easy to operate, and saves both time and labour.
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Inventors:
LIN BAIQUAN (CN)
HONG YIDOU (CN)
ZHU CHUANJIE (CN)
YAO HAO (CN)
HONG YIDOU (CN)
ZHU CHUANJIE (CN)
YAO HAO (CN)
Application Number:
PCT/CN2015/096789
Publication Date:
July 21, 2016
Filing Date:
December 09, 2015
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21B36/00; E21F7/00
Domestic Patent References:
| WO2013163645A1 | 2013-10-31 |
Foreign References:
| CN101832149A | 2010-09-15 | |||
| CN101294500A | 2008-10-29 | |||
| CN104533514A | 2015-04-22 | |||
| CN103114871A | 2013-05-22 | |||
| CN101503957A | 2009-08-12 | |||
| CN102400669A | 2012-04-04 | |||
| US20030173085A1 | 2003-09-18 |
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
北京德崇智捷知识产权代理有限公司 (CN)
北京德崇智捷知识产权代理有限公司 (CN)
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