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:
Aug. 21, 2012
Filed:
Aug. 30, 2010
Iain Cooper, Sugar Land, TX (US);
Claude Vercaemer, Paris, FR;
William Lesso, Houston, TX (US);
Benjamin Peter Jeffryes, Cambridgeshire, GB;
Michael Charles Sheppard, Cambridgeshire, GB;
Iain Cooper, Sugar Land, TX (US);
Claude Vercaemer, Paris, FR;
William Lesso, Houston, TX (US);
Benjamin Peter Jeffryes, Cambridgeshire, GB;
Michael Charles Sheppard, Cambridgeshire, GB;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A subpart of a drill string is described having an outer circumferential surface which is contoured and adapted to engage the wall of the borehole with a small angle of attack while exerting during rotary drilling operations an compacting pressure on mud cake and/or cuttings present in the annulus between the drill string and the borehole.