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. 08, 2014
Filed:
Jul. 28, 2010
Applicant:
Xiaobin LU, Coppell, TX (US);
Inventor:
Xiaobin Lu, Coppell, TX (US);
Assignee:
Varel International Ind., L.P., Carrollton, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 10/00 (2006.01); F16C 33/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the sealing system for a roller cone rock bit. The surface texturing produces a regular or repeated patterned dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes.