Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2011-03-22
2011-03-22
Gay, Jennifer H (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S073000
Reexamination Certificate
active
07909117
ABSTRACT:
A housing including longitudinally extending tubular members interconnected to allow controlled relative bending thereof, during a drilling operation, a rotary drive transmitting torsion bar extending generally longitudinally within the housing to controllably bend in response to relative bending of said members, a rotary drill bit operatively connected to said torsion bar to be rotated as the bar rotates, a rotary drive operatively connected to the torsion bar to rotate the bar, means for controlling relative bending of the said members during torsion bar rotation and as a function of such rotation.
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Buckley Dennis J.
Chustz Mark
Higginbotham James R.
Teys Raymond W.
Van Steenwyk Donald H.
Bukoye Abimbola
Gay Jennifer H
Jackson & Walker, LLP
Locklar Michael
Loikith Catherine
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