CCTEG Xi’an Research Institute,CCTEG Xi’an Research Institute,Geological Survey Institute, Chang’an University,CCTEG Xi’an Research Institute,156 Exploration Team of Xinjiang Bureau of Coalfield Geology
Clc Number:
P634
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Abstract:
For steep formation, soft-hard interbeded layer and burnt rock exist in Baiyanghe coalbed methane mining area in Fukang of Xinjiang, drilling deflection and hole collapse are caused. Pneumatic DTH hammer and EM-MWD directional drilling technology were used to solve these difficult problems; the construction efficiency was more than 3 times than the general drilling speed.