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:
Jul. 22, 2014
Filed:
Mar. 11, 2011
Applicant:
Xiaobin LU, Coppell, TX (US);
Inventor:
Xiaobin Lu, Coppell, TX (US);
Assignee:
Varel International Ind., L.P., Carrollton, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/00 (2006.01); F16J 15/34 (2006.01); E21B 10/25 (2006.01);
U.S. Cl.
CPC ...
F16J 15/344 (2013.01); F16J 15/3404 (2013.01); E21B 10/25 (2013.01);
Abstract
A drill tool includes a bit body, at least one bearing shaft extending from the bit body and a cone mounted for rotation on the bearing shaft. A mechanical seal is disposed between the bearing shaft and the cone in a seal gland. The mechanical seal includes a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland. The mechanical seal further includes at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.