Patent · US Active

Downhole steering

US7559379B2 · kind B2 · utility

20Cited by

121References

19Claims

0Family size

Inventors

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

Key dates

Filing date	Aug 10, 2007
Grant date	Jul 14, 2009
Priority date	—
Expiry date	Dec 1, 2027

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/13
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect of the present invention, a drill string has a drill bit with a body intermediate a shank and a working face. The working face has at least one cutting element. A jack element is disposed within the drill bit body and has a distal end substantially protruding from the working face. The distal end has a primary deflecting surface having an angle relative to a central axis of the jack element of 15 to 75 degrees.

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