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:
May. 23, 2017
Filed:
Feb. 12, 2014
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventors:
Marcel Budde, Vlaardingen, NL;
Brent J. Lirette, Cypress, TX (US);
Michael Logiudice, Cypress, TX (US);
Assignee:
Weatherford Technology Holdings, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/14 (2006.01); E21B 33/13 (2006.01); E21B 33/16 (2006.01); E21B 21/00 (2006.01); E21B 21/08 (2006.01); E21B 43/10 (2006.01);
U.S. Cl.
CPC ...
E21B 33/13 (2013.01); E21B 21/001 (2013.01); E21B 21/08 (2013.01); E21B 33/16 (2013.01); E21B 43/101 (2013.01);
Abstract
A method of running casing in a dual gradient system includes lowering a casing into a low density fluid region and allowing the low density fluid to enter the casing; releasing a plug into the casing; supplying a high density fluid behind the plug; and lowering the casing into a high density fluid region until target depth is reached.