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Bore lining and drilling

  • US 7,004,264 B2
  • Filed: 03/14/2003
  • Issued: 02/28/2006
  • Est. Priority Date: 03/16/2002
  • Status: Expired due to Fees
First Claim
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1. A method of lining and drilling a bore, the method comprising:

  • mounting a first tubing section on a drill string;

    running the drill string and the first tubing section into a pre-existing bore having an unlined section and a lined section lined with an existing tubing;

    locating at least part of the first tubing section in the unlined section;

    lowering a drill bit through at least a portion of the first tubing section; and

    drilling the bore beyond the first tubing section.

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