Expandable reamer apparatus

  • US 8,020,635 B2
  • Filed: 03/30/2010
  • Issued: 09/20/2011
  • Est. Priority Date: 07/30/2002
  • Status: Active Grant
First Claim
Patent Images

1. An expandable reamer for drilling a subterranean formation, comprising:

  • a tubular body;

    at least one blade carried by the tubular body; and

    an actuation member selectively and repeatably positionable between a first position within the tubular body and a second position within the tubular body, and configured to maintain the expandable reamer in a first operating condition during a flow of drilling fluid through the tubular body when the actuation member is positioned in the first position and to maintain the expandable reamer in a second operating condition during a substantially identical flow of drilling fluid through the tubular body when the actuation member is positioned in the second position.

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