07900717 is referenced by 45 patents and cites 149 patents.

An expandable reamer apparatus for drilling a subterranean formation includes 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 includes at least one cutting element configured to remove material from a subterranean formation during reaming. The push sleeve is 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.

Title
Expandable reamers for earth boring applications
Application Number
11/949259
Publication Number
7900717 (B2)
Application Date
December 3, 2007
Publication Date
March 8, 2011
Inventor
J Lindley Baugh
College Station
TX, US
Anton F Zahradnik
Sugarland
TX, US
Scott Shiquiang Shu
Spring
TX, US
Steven R Radford
The Woodlands
TX, US
Agent
TraskBritt
Assignee
Baker Hughes Incorporated
TX, US
IPC
E21B 7/28
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