Boring or penetrating the earth – Bit or bit element – Adjustable cutter element
Reexamination Certificate
2010-10-22
2011-11-22
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Adjustable cutter element
C175S432000
Reexamination Certificate
active
08061452
ABSTRACT:
A subterranean drilling system may include a drill string and a rotary drill bit coupled to the drill string. The rotary drill bit may include a bit body and a cutting element coupled to the bit body, with the cutting element being structured to rotate in response to torque applied to the cutting element. The system also may include a cam assembly coupled to the drill string, a cam follower assembly in contact with a cam surface of the cam assembly, and a torque-applying structure coupled to the cam follower assembly. The torque-applying structure may be configured to apply torque to the cutting element in response to relative rotation between the cam assembly and the cam follower assembly.
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Cooley Craig H.
Johnson Christopher F.
Lund Jeffrey
Peterson S. Barrett
Sexton Timothy N.
Holland & Hart LLP
Stephenson Daniel P
US Synthetic Corporation
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