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:
Jul. 25, 2017
Filed:
Jul. 29, 2013
Applicant:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Inventors:
Yiqiao Song, Newton, MA (US);
Michael Wilt, Walnut Creek, CA (US);
Pabitra Sen, Chapel Hill, NC (US);
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 24/08 (2006.01); G01R 33/3415 (2006.01); G01R 33/44 (2006.01); G01V 3/32 (2006.01); G01R 33/36 (2006.01);
U.S. Cl.
CPC ...
G01V 3/32 (2013.01); G01N 24/08 (2013.01); G01R 33/3621 (2013.01); G01N 24/081 (2013.01); G01N 24/085 (2013.01); G01R 33/3415 (2013.01); G01R 33/445 (2013.01);
Abstract
A nuclear magnetic resonance (NMR) system that uses a feedback induction coil to detect NMR signals generated within a substance is described herein. In one embodiment, the NMR system uses the Earth's magnetic field in conjunction with a transmitter coil that applies NMR sequences to a formation. The NMR sequences generate a weak NMR signal within the formation due to the weakness of the Earth's magnetic field. This weak NMR signal is detected using the feedback induction coil.