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:
Sep. 15, 2015
Filed:
Dec. 13, 2005
Applicants:
Frederique Kalb, Boncourt, FR;
Christine Aussibal, Villebon sur Yvette, FR;
Inventors:
Frederique Kalb, Boncourt, FR;
Christine Aussibal, Villebon sur Yvette, FR;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/09 (2012.01); G01R 33/032 (2006.01);
U.S. Cl.
CPC ...
E21B 47/0905 (2013.01); G01R 33/0322 (2013.01);
Abstract
A magneto-optic sensor for oilfield application, the sensor () receives an incident beam IB, IB, IB, IB, IBand comprises a polarizing element () for providing a determined state of polarization beam and a Faraday rotator () for providing a response beam having a modified state of polarization. The sensor provides a response beam (RB, RB, RB, RB, RBhaving an intensity dependent on an external magnetic field representative of a particular characteristic of a well-bore casing CC, CR applied on the Faraday rotator ().