Through the observation on fragments of PDC bit,comprehensive analysis was made on gas geological condition,drilling technology and pressure pumping value of mud pump,and requirements on design and application were put forward.
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马沈岐,乔小红,李宗奎.瓦斯地质钻探中复合片钻头损伤原因及其使用工艺[J].钻探工程,2007,34(8):63-66.MA Shen-qi, QIAO Xiao-hong, LI Zong-kui. Breakage Causes and Application Technology of PDC Bit in Gas Geological Drilling[J]. Drilling Engineering, 2007,34(8):63-66.