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:
Feb. 28, 2006
Filed:
Oct. 02, 2003
Keith A. Moriarty, Houston, TX (US);
Michael R. Johnson, Sugar Land, TX (US);
Attilio C. Pisoni, Houston, TX (US);
Ruben Martinez, Houston, TX (US);
Spyro Kotsonis, Robinson, FR;
Alain P. Dorel, Caluire-et-Cuire, GF;
Pat Patterson, Beasley, TX (US);
Stuart Schaaf, Houston, TX (US);
Keith A. Moriarty, Houston, TX (US);
Michael R. Johnson, Sugar Land, TX (US);
Attilio C. Pisoni, Houston, TX (US);
Ruben Martinez, Houston, TX (US);
Spyro Kotsonis, Robinson, FR;
Alain P. Dorel, Caluire-et-Cuire, GF;
Pat Patterson, Beasley, TX (US);
Stuart Schaaf, Houston, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A directional casing drilling system including a casing string for rotation of a drill bit, a shaft coupled to the casing string, and a sleeve having pads that are hydraulically extensible. The sleeve may be positioned about a portion of the shaft. The invention may also include a tube connecting the sleeve to the drill collar, the tube adapted to conduct drilling fluid, and a valve system adapted to operatively conduct at least a portion of the drilling fluid to the pads whereby the pads move between an extended position and a retracted position.