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:
Nov. 15, 2016
Filed:
Jul. 23, 2013
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventors:
James William Weir, Houston, TX (US);
Dean A. Bennett, Missouri City, TX (US);
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/02 (2006.01); E21B 3/02 (2006.01); E21B 21/00 (2006.01);
U.S. Cl.
CPC ...
E21B 4/02 (2013.01); E21B 3/02 (2013.01); E21B 21/00 (2013.01);
Abstract
A top drive includes a hydraulic motor in fluid communication with first inlet for a supply of pressurized drilling fluid. A drill string adapter is mechanically coupled to the hydraulic motor and is in fluid communication with the first inlet.