Treatment Practice for Complicated Accident of a Large Diameter Deep Hole
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U445.55+1

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    Abstract:

    The paper discussed the treatment for a complicated accident of drill blocking in a large diameter deep hole, detailed the whole process and treatment method and summed up the experience.

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History
  • Received:November 27,2009
  • Revised:January 05,2010
  • Adopted:December 17,2009
  • Online: February 09,2010
  • Published: February 25,2010