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Drilling method

  • US 7,093,675 B2
  • Filed: 08/01/2001
  • Issued: 08/22/2006
  • Est. Priority Date: 08/01/2000
  • Status: Expired due to Fees
First Claim
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1. A method of drilling a bore in an earth formation, the method comprising:

  • providing an outer elongate member attached to an inner elongate member, the inner elongated member at least partially disposed within the outer member;

    mounting a drill bit to one of the members;

    flowing fluid through an inner annulus between the inner member and the outer member; and

    advancing the inner member, the outer member, and the drill bit through the earth formation, thereby forming the bore.

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