Patent · US Active

Clutch for a jack element

US8307919B2 · kind B2 · utility

2Cited by

257References

20Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

David R. Hall · Provo, US
David Lundgreen · Spanish Fork, US

Key dates

Filing date	Jan 11, 2011
Grant date	Nov 13, 2012
Priority date	—
Expiry date	Jan 11, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/62
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.