Patent · US Active

Method and apparatus for drilling with casing

US8281877B2 · kind B2 · utility

37Cited by

19References

22Claims

0Family size

Assignee

Weatherford/Lamb, Inc. · US

Inventors

David Shahin · Houston, US
Jeff Habetz · Houston, US
David M. Haugen · League City, US
Gary Thompson · Katy, US
Bernd-Georg Pietras · Großburgwedel, DE
Jimmy L. Hollingsworth · Cypress, US
Bernd Reinholdt · Hannover, DE

Key dates

Filing date	Sep 24, 2008
Grant date	Oct 9, 2012
Priority date	—
Expiry date	Sep 24, 2028

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B19/14
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A top drive system includes a top drive, top drive adapter, and a tubular positioning apparatus. In another aspect, the top drive adapter includes a housing operatively connected to the top drive and a plurality of retaining members disposed in the housing for gripping the tubular. In another aspect, the tubular positioning apparatus includes a gripping member for engaging a tubular and a conveying member for positioning the gripping member. A spinner may be provided to rotate the tubular.

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