Boring or penetrating the earth – Processes
Reexamination Certificate
2004-11-26
2008-12-23
Bomar, Shane (Department: 3676)
Boring or penetrating the earth
Processes
C175S267000, C175S325100, C166S174000
Reexamination Certificate
active
07467671
ABSTRACT:
A method is provided for removing a body of selected material from the interior of a casing extending into a borehole formed in an earth formation. The method comprises lowering a drill bit for further drilling of the borehole, into the casing, the drill bit having a longitudinal axis of rotation during operation, the drill bit comprising rock cutting means, at least one protection member for protecting the inner surface of the casing from contact with the rock cutting means, each protection member being adapted to remove said selected material from the interior of the casing and being radially movable towards the inner surface of the casing, and control means for applying a radially outward force of controlled magnitude to the protection member. The drill bit is rotated in the casing, and the control means is operated so as to apply said radially outward force of controlled magnitude to the protection member.
REFERENCES:
patent: 2427052 (1947-09-01), Grant
patent: 2438673 (1948-03-01), McMahan
patent: 2857141 (1958-10-01), Carpenter
patent: 3051255 (1962-08-01), Deely
patent: 3289760 (1966-12-01), Kammerer
patent: 4031972 (1977-06-01), Burg
patent: 4545441 (1985-10-01), Williamson
patent: 4809779 (1989-03-01), Ledyashov et al.
patent: 4809793 (1989-03-01), Hailey
patent: 4842083 (1989-06-01), Raney
patent: 5074366 (1991-12-01), Karlsson et al.
patent: 5141063 (1992-08-01), Quesenbury
patent: 5788000 (1998-08-01), Maury et al.
patent: 6176328 (2001-01-01), Caraway et al.
patent: 6189631 (2001-02-01), Sheshtawy
patent: 6397958 (2002-06-01), Charles et al.
patent: 7036611 (2006-05-01), Radford et al.
patent: 2002/0166703 (2002-11-01), Presley et al.
patent: 2003/0155155 (2003-08-01), Dewey et al.
patent: 2003/0201125 (2003-10-01), Raney
patent: 2351849 (2000-06-01), None
patent: 0869256 (1998-10-01), None
patent: 1270868 (2003-01-01), None
patent: 02/079604 (2002-10-01), None
patent: 2004/104361 (2004-12-01), None
International Search Report PCT/EP2004/05053125 dated May 13, 2005.
Savignat Jean-Michel Claude Gaston
Zijsling Djurre Hans
Bomar Shane
Shell Oil Company
LandOfFree
Drill bit with protection member does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit with protection member, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit with protection member will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4031913