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. 17, 2020
Filed:
Nov. 08, 2017
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventor:
Martin Liess, Seelze, DE;
Assignee:
WEATHERFORD TECHNOLOGY HOLDINGS, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/02 (2006.01); F16D 1/10 (2006.01); F16D 1/092 (2006.01); E21B 41/00 (2006.01); E21B 19/16 (2006.01); E21B 19/08 (2006.01); F16D 1/112 (2006.01); E21B 17/04 (2006.01);
U.S. Cl.
CPC ...
F16D 1/10 (2013.01); E21B 3/02 (2013.01); E21B 17/04 (2013.01); E21B 19/08 (2013.01); E21B 19/16 (2013.01); E21B 41/00 (2013.01); F16D 1/092 (2013.01); F16D 1/112 (2013.01); F16D 2001/103 (2013.01);
Abstract
A drive unit includes a drive stem having first friction surfaces and a load coupling, wherein the load coupling is a threaded coupling. The drive unit also includes a transmission unit having second friction surfaces parallel to the first friction surfaces; and shoulders proximate a bottom of the transmission unit. The drive unit further includes a transmission selector movable to an 'on' position or an 'off' position, wherein the drive stem moves synchronously with the transmission unit when the transmission selector is in the “on” position.