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Application of Truck-mounted DTH Hammer Drilling Technology in CBM Well Construction
Author(s): 
Pages: 59-61
Year: Issue:  7
Journal: Coal Geology of China

Keyword:  CBM drillingDTH hammerdrilling technologyHancheng mining area;
Abstract:  The Hancheng mining area is situated on the eastern part of the Shaanxi Weibei Permo-Carboniferous coalfield, tectonically at the southeastern margin of the Ordos Basin. Structure is complex with developed faults on its edge and shallow parts, gentle strata with few faults on middle and deep parts. CBM resources are abundant in the mining area. Based on mining area strata and drilling hard nuts analyses, using DTH hammer drilling technology in CBM well construction is suggested. Through the introduction to drilling fluid technology and drilling parameters, the author has explained the application of DTH hammer drilling technology in CBM well con-struction in detail. The result has demonstrated that using the truck-mounted DTH hammer drilling technology can shorten net drilling time greatly, thus drilling efficiency promoted, cost economized, and lowered down drilling accident hazards at the same time.
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