Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2007-04-24
2007-04-24
Neuder, William (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S385000, C175S075000
Reexamination Certificate
active
10483922
ABSTRACT:
A rotary drill bit assembly suitable for directionally drilling a borehole into an underground formation, the drill bit assembly having a bit body extending along a central longitudinal bit-body axis, and having a bit-body face at its front end, wherein an annular portion of the bit-body face is provided with one or more chip-making elements; a pilot bit extending along a central longitudinal pilot-bit axis, the pilot bit being partly arranged within the bit body and projecting out of the central portion of the bit-body face, the pilot bit having a pilot-bit face provided with one or more chip-making elements at its front end; a joint means arranged to pivotably connect the pilot bit to the bit body so that the bit-body axis and the pilot-bit axis can form a variable diversion angle; and a steering means arranged to pivot the pilot bit in order to steer the direction of drilling.
REFERENCES:
patent: 2018007 (1935-10-01), Brewster
patent: 2179010 (1939-11-01), Creighton et al.
patent: 2284580 (1942-05-01), Kammerer
patent: 3052838 (1962-09-01), Bennett et al.
patent: 3112442 (1963-11-01), Bennett
patent: 3429387 (1969-02-01), Brown
patent: 3700049 (1972-10-01), Tiraspolsky et al.
patent: 4446935 (1984-05-01), Schumacher, Jr.
patent: 4836301 (1989-06-01), Van Dongen et al.
patent: 4932005 (1990-06-01), Birdwell
patent: 4974688 (1990-12-01), Helton
patent: 5078218 (1992-01-01), Smet
patent: 5103919 (1992-04-01), Warren et al.
patent: 5244050 (1993-09-01), Estes
patent: 5503236 (1996-04-01), Tibbitts
patent: 5589825 (1996-12-01), Pomerleau
patent: 6269891 (2001-08-01), Runia
patent: 3927625 (1989-08-01), None
patent: 3927625 (1991-02-01), None
patent: 1008717 (2000-06-01), None
patent: 2146126 (1985-04-01), None
patent: 1049647 (1992-10-01), None
patent: WO017488 (2000-03-01), None
Runia Douwe Johannes
Smith David George Livesey
Worrall Robert Nicholas
Coy Nicole A
Neuder William
Shell Oil Company
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