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. 02, 2021
Filed:
Jan. 25, 2016
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventor:
Bjoern Thiemann, Burgwedel, DE;
Assignee:
Weatherford Technology Holdings, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 19/16 (2006.01); E21B 3/02 (2006.01); E21B 17/042 (2006.01); F16H 19/02 (2006.01);
U.S. Cl.
CPC ...
E21B 19/164 (2013.01); E21B 3/02 (2013.01); E21B 17/042 (2013.01); F16H 19/02 (2013.01);
Abstract
A top drive unit including a top drive housing, a drive stem disposed in the top drive housing, a carrier configured to axially move the drive stem relative to the top drive housing, and a drive mechanism for rotating the drive stem.