Boring or penetrating the earth – Processes
Reexamination Certificate
2006-11-28
2006-11-28
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
Processes
C175S317000, C175S339000, C175S366000
Reexamination Certificate
active
07140454
ABSTRACT:
A well drilling bit having a bit body attachable to a tubular drill string, which bit body is internally provided with a passageway providing fluid communication, when the drill string is attached to the bit body, between the interior of the drill string and the exterior of the bit body; a closure element for selectively closing the passageway; and one or more chip-making elements, wherein the chip-making elements has one or more roller-cones, wherein the closure element is releasably connectable to the bit body, and outwardly movable from a closing position to an opening position, and wherein the closure element includes at least one of the roller-cones.
REFERENCES:
patent: 2179010 (1939-11-01), Creighton et al.
patent: 2284580 (1942-05-01), Kammerer
patent: 2782005 (1957-02-01), Appleton
patent: 3052838 (1962-09-01), Bennett et al.
patent: 3112442 (1963-11-01), Bennett
patent: 3117636 (1964-01-01), Wilcox et al.
patent: 3216514 (1965-11-01), Nelson
patent: 3409081 (1968-11-01), Brown
patent: 3429387 (1969-02-01), Brown
patent: 3700049 (1972-10-01), Tirapolsky et al.
patent: 3789936 (1974-02-01), McCullough
patent: 4096917 (1978-06-01), Harris
patent: 4421184 (1983-12-01), Mullins
patent: 4932005 (1990-06-01), Birdwell
patent: 5244050 (1993-09-01), Estes
patent: 5589825 (1996-12-01), Pomerleau
patent: 6269891 (2001-08-01), Runia
patent: 2.146.126 (1985-11-01), None
patent: 2345502 (2000-07-01), None
patent: 99/08827 (1999-02-01), None
patent: 00/17488 (2000-03-01), None
Bomar Shane
Gay Jennifer H.
Shell Oil Company
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