Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Reexamination Certificate
2011-03-08
2011-03-08
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Cutter element laterally shiftable below ground
Cutter element shifted by fluid pressure
C175S285000
Reexamination Certificate
active
07900717
ABSTRACT:
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.
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Baugh J. Lindley
Radford Steven R.
Shu Scott Shiquiang
Zahradnik Anton F.
Baker Hughes Incorporated
Michener Blake
Stephenson Daniel P
TraskBritt
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