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. 06, 2018
Filed:
Dec. 14, 2016
Applicant:
Longyear Tm, Inc., Salt Lake City, UT (US);
Inventors:
Assignee:
LONGYEAR TM, INC., Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 19/00 (2006.01); E21B 19/06 (2006.01); E21B 31/12 (2006.01); E21B 21/02 (2006.01); B66C 1/44 (2006.01); B66C 1/56 (2006.01);
U.S. Cl.
CPC ...
E21B 19/06 (2013.01); B66C 1/44 (2013.01); B66C 1/56 (2013.01); E21B 21/02 (2013.01); E21B 31/12 (2013.01); E21B 19/008 (2013.01);
Abstract
Implementations described herein include a hoisting device and method for handling, coupling and recovery of tubular members such as drill string components. The hoisting device has a self-energizing gripping means configured to releasably engage a drill string component. In one aspect, the self-energizing gripping means can be operable to increase at least one of a radial biasing force and a contact friction force applied to a drill string component, causing the gripping means to increase the overall gripping force applied to the component with minimal effort exerted by a hoisting device operator.