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ZHANG Tao, GUO Baoduo. Application of Drag PDC Bit in Gas Extraction Drilling of Coal Mine[J]. Safety in Coal Mines, 2015, 46(12): 96-97,100.
Citation: ZHANG Tao, GUO Baoduo. Application of Drag PDC Bit in Gas Extraction Drilling of Coal Mine[J]. Safety in Coal Mines, 2015, 46(12): 96-97,100.
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Application of Drag PDC Bit in Gas Extraction Drilling of Coal Mine

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  • Published Date: December 19, 2015
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    • Abstract
  • In order to solve the problem that the drilling efficiency is low and the life of bit is short when the three wing concave PDC bit was used in gas drainage drilling, the PDC bit was designed and selected. And the drag bit was selected and the cutting teeth were replaced, which achieved a good affection, and the problem of low drilling efficiency and short bit life was solved.
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    • References (8)
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