08028767 is referenced by 68 patents and cites 158 patents.

An expandable reamer apparatus for drilling a subterranean formation may include a tubular body, one or more blades, each blade positionally coupled to a sloped track of the tubular body, a push sleeve and a drilling fluid flow path extending through an inner bore of the tubular body for conducting drilling fluid therethrough. Each of the one or more blades may be configured to ream a subterranean formation. The push sleeve may be disposed in the inner bore of the tubular body and coupled to each of the one or more blades so as effect axial movement thereof along the track to an extended position responsive to exposure to a force or pressure of drilling fluid in the flow path of the inner bore. Each blade may include one or more roller elements for reaming a wellbore.

Title
Expandable stabilizer with roller reamer elements
Application Number
12/361428
Publication Number
8028767 (B2)
Application Date
January 28, 2009
Publication Date
October 4, 2011
Inventor
Timothy K Marvel
The Woodlands
TX, US
Steven R Radford
The Woodlands
TX, US
Agent
Locke Lord Bissell & Liddell
Assignee
Baker Hughes Incorporated
TX, US
IPC
E21B 7/28
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