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:
Oct. 30, 2018
Filed:
Jul. 30, 2014
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventors:
Jeffery Morrison, Missouri City, TX (US);
Brent J. Lirette, Cypress, TX (US);
Michael LoGiudice, Cypress, TX (US);
Paul L. Smith, Katy, TX (US);
Assignee:
WEATHERFORD TECHNOLOGY HOLDINGS, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 17/10 (2006.01); E21B 23/01 (2006.01); E21B 23/06 (2006.01);
U.S. Cl.
CPC ...
E21B 17/1028 (2013.01); E21B 17/10 (2013.01); E21B 17/1014 (2013.01); E21B 17/1021 (2013.01); E21B 17/1078 (2013.01); E21B 23/01 (2013.01); E21B 23/06 (2013.01);
Abstract
A centralizer having bow springs in a retracted position to facilitate passage through a restriction. After passing through the restriction, the bow springs may be expanded to support a casing. In one embodiment, the bow springs may be expanded using a movable sleeve.