Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2007-03-27
2007-03-27
Lagman, Frederick L. (Department: 3673)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S073000, C175S074000, C175S320000
Reexamination Certificate
active
10992284
ABSTRACT:
A steering assembly includes upper and lower tubular housings connected by a universal joint. An angle cam is disposed on the end of the lower housing and projects into the upper housing. A plurality of wedge members extend axially from the upper housing and into engagement with the angle cam. Drive trains are connected to the wedge members to move the wedge members toward and away from the angle cam so as to pivot the lower housing at the universal joint and change the angle and azimuth of the lower housing with respect to the upper housing. The lower housing is connected to a bearing pack supporting a drill bit such that upon changing the angle and azimuth of the lower housing, the direction of the drilling of the drill bit is also changed. The steering assembly being connected to composite tubing having conductors in the wall thereof for conducting data and commands between the steering assembly and a processor at the surface and for providing power to the steering assembly. Data on the position of the bit is transmitted to a processor which determines the direction of drilling and selectively transmits commands to the steering assembly to change the bend angle and direction of the drilling of the bit.
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Eppink Jay M.
Estep James W.
Odell, II Albert C.
Terry James B.
Trainor William F.
Conley Rose, P C
Halliburton Energy Services Inc
Lagman Frederick L.
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