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. 24, 2009
Filed:
Dec. 17, 2003
Iain Cooper, Sugar Land, TX (US);
Claude Vercaemer, Paris, FR;
William Lesso, Houston, TX (US);
Benjamin Peter Jeffryes, Histon, GB;
Michael Charles Sheppard, Hadstock, GB;
Iain Cooper, Sugar Land, TX (US);
Claude Vercaemer, Paris, FR;
William Lesso, Houston, TX (US);
Benjamin Peter Jeffryes, Histon, GB;
Michael Charles Sheppard, Hadstock, GB;
Schlumberger Technology Corporation, Cambridge, MA (US);
Abstract
The present invention generally relates to an apparatus and methods for improving the stability of a wellbore during drilling operations using a rotary drill string. More specifically, embodiments of the present invention provide systems and methods for enhancing the performance of the filter or mud cake layer on the wall of the wellbore as a protective and isolating layer.