Clutch for a jack element

Details Clutch for a jack element Clutch for a jack element

2011-01-11

2011-01-11

Gay, Jennifer H (Department: 3676)

Boring or penetrating the earth

Below-ground impact members

C175S026000, C175S104000, C175S105000, C175S107000, C175S298000, C175S306000

Reexamination Certificate

active

07866416

ABSTRACT:
A downhole tool string, comprising a tool string bore and a drill bit located at the bottom of the tool string. The drill bit comprises a body intermediate a shank and a working surface. The working surface may comprise a substantially coaxial rotationally isolated jack element with a portion of the jack element extending out of an opening formed in the working surface to engage a subterranean formation. The tool string may comprise a driving mechanism adapted to rotate the jack. The clutch assembly disposed within the tool string bore may comprise a first end in communication with the jack element and second end in communication with the driving mechanism.

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