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《Coal Geology & Exploration》 2002-01
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Development of M - 700 type extracting coalbed methane drill rig

TIAN Hong-liang,YIN Xin-sheng,YAO Ning-ping,YAO Ke,PANG Hai-rong,YAN Nan-fei (Xi'an Branch, CW, Xi'an 710054,China)  
The M - 700 type extracting coalbed methane drill rig is a major substance ofThe Research on Extracting Coalbed Methane Drilling Equipment and Technology for Nearly Horizontal Longhole Drilling in Collierwhich is a new project of science and technical research in 1997. This thesis introduces briefly the structures, test situations and main technical parameters of the drill rig.
【CateGory Index】: P634.3
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