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:
Dec. 15, 2015
Filed:
Dec. 07, 2011
Applicants:
Pierre Vigneaux, Moisenay, FR;
Nicolas Flamant, Montrouge, FR;
Thomas Barrou, Cachan, FR;
Inventors:
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/12 (2012.01); E21B 33/14 (2006.01); E21B 47/00 (2012.01); G01L 1/24 (2006.01);
U.S. Cl.
CPC ...
E21B 47/12 (2013.01); E21B 33/14 (2013.01); E21B 47/00 (2013.01); E21B 47/0005 (2013.01); E21B 47/123 (2013.01); G01L 1/246 (2013.01);
Abstract
Improved equipment and methods for determining the waiting-on-cement time after a cementing operation involve an optic-fiber coil that immersed in the cement slurry downhole. The intensity of a reflected light signal from the coil is monitored versus time. Attenuation of the reflected-light intensity corresponds to the development of gel strength, allowing operators to unambiguously determine when well-bore operations may recommence after a cement job. The optic-fiber coil is wound around a spool such that there is at least one coil crossing on the spool.