Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate
2005-01-11
2005-01-11
Neuder, Wlliam (Department: 3672)
Boring or penetrating the earth
Automatic control
Of advance or applied tool weight
C175S061000, C175S076000
Reexamination Certificate
active
06840336
ABSTRACT:
The invention refers to a drilling tool and method that, among other aspects, provides for a sleeve with expansible pads for positioning the drilling tool in the desired direction during drilling. The pads are hydraulically expanded and retracted by a valve system which selectively diverts mud flowing through the tool to the desired pads. The tool may also be provided with a flexible tube connecting the sleeve to drilling tool for maneuvering along deviations or curves in the wellbore.
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Dorel Alain
Patterson, II Albert E.
Schaaf Stuart
Echols Brigitte L.
Neuder Wlliam
Ryberg John
Schlumberger Technology Corporation
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