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. 27, 2018
Filed:
Mar. 18, 2016
Applicant:
National Oilwell Varco Norway As, Kristiansand S, NO;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66D 1/26 (2006.01); B66D 1/14 (2006.01); E21B 19/00 (2006.01); E21B 19/084 (2006.01);
U.S. Cl.
CPC ...
B66D 1/26 (2013.01); B66D 1/14 (2013.01); E21B 19/008 (2013.01); E21B 19/084 (2013.01);
Abstract
Disclosed is a draw-works and a method of operation. The draw-works includes a first drum configured to store and reel in an elongated hoisting member, such as a hoisting cable, a second drum configured to store and reel in the elongated hoisting member, and a rotation device configured to rotate the first and second drums, wherein at least one of the drums is selectively connectable to and disconnectable from the rotation device.