Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2007-10-30
2007-10-30
Gay, Jennifer H (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S026000, C175S076000, C175S099000
Reexamination Certificate
active
10978783
ABSTRACT:
An apparatus for steerable rotary drilling of a borehole having a wall in the earth comprising a mandrel having a central opening there through for the passage of drilling fluids. The mandrel having a lower connection for operatively connecting to a drill bit structure and an upper connection for operatively connecting to a drill string above said apparatus. The mandrel further having an intermediate portion, an outer housing surrounding longitudinal extent of the mandrel intermediate portion, a differential displacement drive within the outer housing, one or more pairs of radially-extensible, opposed side-force exerting elements controlled by the differential displacement drive to provide for side force exertion against the borehole wall.
REFERENCES:
patent: 4394881 (1983-07-01), Shirley
patent: 4471843 (1984-09-01), Jones, Jr. et al.
patent: 4635736 (1987-01-01), Shirley
patent: 4828050 (1989-05-01), Hashimoto
patent: 5038872 (1991-08-01), Shirley
patent: 5139094 (1992-08-01), Prevedel et al.
patent: 5265682 (1993-11-01), Russell et al.
patent: 5307885 (1994-05-01), Kuwana et al.
patent: 5353884 (1994-10-01), Misawa et al.
patent: 5520255 (1996-05-01), Barr et al.
patent: 5695015 (1997-12-01), Barr et al.
patent: 5803185 (1998-09-01), Barr et al.
patent: 5842149 (1998-11-01), Harrell et al.
patent: 5875859 (1999-03-01), Ikeda et al.
patent: 5941323 (1999-08-01), Warren
patent: 5979570 (1999-11-01), McLoughlin et al.
patent: 6116355 (2000-09-01), Thorp et al.
patent: 6158529 (2000-12-01), Dorel
patent: 6209664 (2001-04-01), Chaffaut
patent: 6244361 (2001-06-01), Comeau et al.
patent: 6257356 (2001-07-01), Wassell
patent: 6439325 (2002-08-01), Peters et al.
patent: 2002/0011358 (2002-01-01), Wassell
patent: 2002/0088648 (2002-07-01), Krueger et al.
patent: 2003/0051919 (2003-03-01), Moore et al.
patent: 2004/0084219 (2004-05-01), Moore et al.
patent: 0677640 (1995-10-01), None
patent: 2 257 182 (1993-01-01), None
patent: 2 259 316 (1993-03-01), None
patent: WO 01/04453 (2001-01-01), None
Teys Raymond W.
Van Steenwyk Donald H.
Gay Jennifer H
Haefliger William W.
Scientific Drilling International
LandOfFree
Steerable drilling apparatus having a differential... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steerable drilling apparatus having a differential..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steerable drilling apparatus having a differential... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3902395