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:
Jul. 11, 2008
Lawrence E. Wells, Yorba Linda, CA (US);
Preston Fox, Fountain Valley, CA (US);
Cliff Swiontek, Brece, CA (US);
Svein Stubstad, Houston, TX (US);
Howard L. Ervin, Spring, TX (US);
James D. Brugman, Spring, TX (US);
Paul Conover, Cypress, TX (US);
Lawrence E. Wells, Yorba Linda, CA (US);
Preston Fox, Fountain Valley, CA (US);
Cliff Swiontek, Brece, CA (US);
Svein Stubstad, Houston, TX (US);
Howard L. Ervin, Spring, TX (US);
James D. Brugman, Spring, TX (US);
Paul Conover, Cypress, TX (US);
National Oilwell Varco, L.P., Houston, TX (US);
Abstract
A top drive system for wellbore operations, the top drive system including motor apparatus, a main shaft driven by the motor apparatus, the main shaft having a top end and a bottom end, a quill connected to the main shaft, a gear system interconnected with the quill and the motor apparatus, and a multi-seal system for sealing against the quill. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).