Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by longitudinally relatively movable...
Reexamination Certificate
2011-07-12
2011-07-12
Wright, Giovanna C (Department: 3672)
Boring or penetrating the earth
Cutter element laterally shiftable below ground
Cutter element shifted by longitudinally relatively movable...
C175S268000, C175S269000
Reexamination Certificate
active
07975783
ABSTRACT:
In accordance with an embodiment of the present invention, a drilling tool includes a tubular body defining a longitudinal axial cavity extending therethrough and defining at least one cutter element recess. The drilling tool also includes a cutter element at least partially disposed within the at least one cutter element recess and includes at least first and second cutting arms at least substantially disposed within the cutter element recess in a retracted position. The first and second cutting arms are operable to move from the retracted position to an extended position in which the first and second cutting arms extend at least partially beyond a periphery of the tubular body. The first and second cutting arms and the tubular body enclose a space when the first and second cutting arms are in the extended position.
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Dithmar Erik
Fanuel Philippe
Lassoie Jean-Pierre
Mageren Olivier
Moi Erik Stein
Baker & Botts L.L.P.
Halliburton Energy Service,s Inc.
Wright Giovanna C
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