The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2009
Filed:
Mar. 20, 2007
Bernd-georg Pietras, Wedgemark, DE;
Thomas F. Bailey, Houston, TX (US);
Adrian Vuyk, Jr., Houston, TX (US);
Carl J. Wilson, Hockley, TX (US);
Bernd-Georg Pietras, Wedgemark, DE;
Thomas F. Bailey, Houston, TX (US);
Adrian Vuyk, Jr., Houston, TX (US);
Carl J. Wilson, Hockley, TX (US);
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spear and the clamping head can be engaged to transmit torque therebetween from the top drive. In addition, an aspect of the invention provides variable height wickers positioned on slips to enable use of the slips with variable inner diameter (ID) and weight casing without deformation or rupture of the casing. Still further, a casing collar is also provided to provide reinforcement to the casing in the area of slip contact with the casing ID.