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:
Nov. 11, 2003
Filed:
Jan. 23, 2002
Applicant:
Inventors:
Burt A. Adams, Berwick, LA (US);
William C. Shafer, Berwick, LA (US);
Norman A. Henry, Mandeville, LA (US);
Assignee:
Oil & Gas Rental Services, Inc., Amelia, LA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 1/906 ; E21B 1/907 ; E21B 1/916 ; E21B 1/918 ; E21B 3/3035 ;
U.S. Cl.
CPC ...
E21B 1/906 ; E21B 1/907 ; E21B 1/916 ; E21B 1/918 ; E21B 3/3035 ;
Abstract
A method of lowering items from a drilling rig to a well located below it through the use of a landing string comprised of drill pipe having an enlarged diameter section with a shoulder, in combination with upper and lower holders having wedge members with shoulders that engage and support the drill pipe at the shoulder of the enlarged diameter section. The shoulder of the drill pipe and the shoulders of the wedge members are rotatable with respect to each other.