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:
Feb. 16, 2016
Filed:
Oct. 17, 2014
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventors:
Don M. Hannegan, Fort Smith, AR (US);
Thomas F. Bailey, Abilene, TX (US);
Simon J. Harrall, Houston, TX (US);
Assignee:
Weatherford Technology Holdings, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/12 (2006.01); E21B 17/07 (2006.01); E21B 19/09 (2006.01); E21B 21/08 (2006.01); E21B 33/08 (2006.01); E21B 19/00 (2006.01); B63B 35/44 (2006.01); E21B 33/064 (2006.01); E21B 34/04 (2006.01); E21B 47/00 (2012.01); E21B 21/00 (2006.01);
U.S. Cl.
CPC ...
E21B 19/006 (2013.01); B63B 35/4413 (2013.01); E21B 7/12 (2013.01); E21B 19/09 (2013.01); E21B 21/08 (2013.01); E21B 33/064 (2013.01); E21B 33/085 (2013.01); E21B 34/04 (2013.01); E21B 47/0001 (2013.01); E21B 2021/006 (2013.01);
Abstract
A system compensates for heave induced pressure fluctuations on a floating rig when a drill string or tubular is lifted off bottom and suspended on the rig, such as when tubular connections are made during MPD, tripping, or when a kick is circulated out during conventional drilling. The system also compensates for heave induced pressure fluctuations on a floating rig when a riser telescoping joint located below a RCD is moving while drilling.