Patent · US Active

Apparatus for gripping a tubular on a drilling rig

US7874352B2 · kind B2 · utility

64Cited by

299References

18Claims

0Family size

Assignee

Weatherford/Lamb, Inc. · US

Inventors

Albert C. Odell, II · Kingwood, US
Richard L. Giroux · Cypress, US
Tuong Thanh Le · Houston, US
Gary Thompson · Katy, US
Karsten Heidecke · Houston, US
Joerg Lorenz · Burgwedel, DE
Doyle Frederic Boutwell, Jr. · Houston, US
Michael Hayes · Belleville, US
Bernd-Georg Pietras · Großburgwedel, DE

Key dates

Filing date	Dec 12, 2006
Grant date	Jan 25, 2011
Priority date	—
Expiry date	Aug 31, 2028

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/0422
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Methods and apparatus for running tubulars into and out of a wellbore. A gripping apparatus is activated with an actuator having a primary actuator and a redundant safety feature. The redundant safety feature may include one or more redundant fluid operated pistons. The gripping apparatus may include an integrated safety system adapted to prevent damage to the tubulars while making and breaking out connections between the tubulars and the tubular string.

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