Expandable underreamer/stabilizer

CAFC
  • US 6,732,817 B2
  • Filed: 02/19/2002
  • Issued: 05/11/2004
  • Est. Priority Date: 02/19/2002
  • Status: Active Grant
First Claim
Patent Images

1. An expandable downhole tool for use in a drilling assembly positioned within a wellbore, comprising:

  • a tubular body including at least one axial recess, a plurality of angled channels formed into a wall of said at least one axial recess, and an axial flowbore extending therethrough; and

    at least one moveable arm;

    wherein said at least one moveable arm translates along said plurality of angled channels between a collapsed position and an expanded position in response to a differential pressure between said axial flowbore and said wellbore.

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