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Methods and apparatus for wellbore construction and completion

  • US 7,311,148 B2
  • Filed: 02/09/2004
  • Issued: 12/25/2007
  • Est. Priority Date: 02/25/1999
  • Status: Expired
First Claim
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1. A method of cementing a borehole, comprising:

  • extending a drill string into the earth to form the borehole, the drill string including an earth removal member having at least one fluid passage therethrough, the earth removal member operatively connected to a lower end of the drill string;

    drilling the borehole to a desired location using a drilling mud passing through the at least one fluid passage;

    providing at least one secondary fluid passage between the interior of the drill string and the borehole;

    providing a barrier across the at least one secondary fluid passage;

    rupturing the barrier, thereby opening the at least one secondary fluid passage; and

    directing a physically alterable bonding material into an annulus between the drill string and the borehole through the at least one secondary fluid passage.

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