Patent · US Active

Drill bit with a force application device using a lever device for controlling extension of a pad from a drill bit surface

US9140074B2 · kind B2 · utility

14Cited by

23References

13Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Thorsten Schwefe · Virginia Water, GB
Dan Raz · Tirat Karmel, IL
Gregory Rinberg · Haifa, IL

Key dates

Filing date	Jul 30, 2012
Grant date	Sep 22, 2015
Priority date	—
Expiry date	Sep 8, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/40
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect, a drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit and a force application device configured to extend and retract the pad, wherein the force application device includes a force action member that includes a lever action device configured to extend and retract the pad from the drill bit surface. In another aspect, a method of drilling a wellbore is provided that in one embodiment includes: conveying a drill string having a drill bit at an end thereof, wherein the drill bit includes a pad configured to extend and retract from a surface of the drill bit and a force application device that includes a lever action device configured to extend and retract the pad from the surface of the drill bit; and rotating the drill bit to drill the wellbore.

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