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. 06, 2010
Filed:
Dec. 11, 2007
Applicants:
Lawrence Edward Wells, Yorba Linda, CA (US);
Preston R. Fox, Fountain Valley, CA (US);
Darrin Lynn Yenzer, Cypress, TX (US);
Inventors:
Lawrence Edward Wells, Yorba Linda, CA (US);
Preston R. Fox, Fountain Valley, CA (US);
Darrin Lynn Yenzer, Cypress, TX (US);
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 19/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A top drive system for wellbore drilling operations, the top drive system including a main shaft having an upper shaft seal system with a raised platform for supporting the seal system. The top drive may also have a shroud for covering the seal(s), and contaminants may flow down from the seals, since the seals are raised by the platform.