Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate
2006-02-28
2006-02-28
Neuder, William (Department: 3672)
Boring or penetrating the earth
Automatic control
Of advance or applied tool weight
C175S061000, C175S076000
Reexamination Certificate
active
07004263
ABSTRACT:
A directional casing drilling system including a casing string for rotation of a drill bit, a shaft coupled to the casing string, and a sleeve having pads that are hydraulically extensible. The sleeve may be positioned about a portion of the shaft. The invention may also include a tube connecting the sleeve to the drill collar, the tube adapted to conduct drilling fluid, and a valve system adapted to operatively conduct at least a portion of the drilling fluid to the pads whereby the pads move between an extended position and a retracted position.
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Dorel Alain P.
Johnson Michael R.
Kotsonis Spyro
Martinez Ruben
Moriarty Keith A.
Gaudier Dale V.
Neuder William
Salazar Jennie
Schlumberger Technology Corporation
Segura Victor H.
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