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. 13, 2018
Filed:
Feb. 26, 2009
Applicant:
Brian Clark, Sugar Land, TX (US);
Inventor:
Brian Clark, Sugar Land, TX (US);
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugarland, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 19/00 (2006.01); G01R 25/00 (2006.01); G01R 27/00 (2006.01); E21B 47/022 (2012.01); G01V 3/30 (2006.01); G01V 3/26 (2006.01);
U.S. Cl.
CPC ...
E21B 47/02216 (2013.01); G01V 3/26 (2013.01); G01V 3/30 (2013.01);
Abstract
A method of locating a conductive target from a wellbore includes generating a current flowing across an insulated gap in a downhole tool positioned in the wellbore, measuring an azimuthal magnetic field with at least one external magnetometer located proximate the exterior of the downhole tool, measuring a secondary magnetic field using a magnetometer disposed inside the downhole tool, computing at least one of a direction and a distance to the conductive target.