Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Axially spaced opposed bore wall engaging guides
Reexamination Certificate
2005-07-05
2005-07-05
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Axially spaced opposed bore wall engaging guides
C175S061000, C175S073000
Reexamination Certificate
active
06913095
ABSTRACT:
A closed-loop drilling system utilizes a bottom hole assembly (“BHA”) having a steering assembly having a rotating member and a non-rotating sleeve disposed thereon. The sleeve has a plurality of expandable force application members that engage a borehole wall. A power source and associated electronics for energizing the force application members are located outside of the non-rotating sleeve. A preferred drilling system includes a surface control unit and a BHA processor cooperate to guide the drill bit along a selected well trajectory in response to parameters detected by one or more sensors. In a preferred closed-loop mode of operation, the BHA processor automatically adjusts the force application members in response to data provided by one or more sensors. In a preferred embodiment, the non-rotating sleeve and rotating member include a sensor that determines the orientation of the sleeve relative to the rotating member.
REFERENCES:
patent: 5341886 (1994-08-01), Patton
patent: 6173793 (2001-01-01), Thompson et al.
patent: 2001/0042643 (2001-11-01), Krueger et al.
patent: WO98/34003 (1998-08-01), None
patent: WO00/28188 (2000-05-01), None
Bagnell David
Baker Hughes Incorporated
Collins Giovanna
Madan Mossman & Sriram P.C.
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