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. 14, 2010
Filed:
Oct. 05, 2007
Brian Clark, Sugar Land, TX (US);
Frank Morrison, Berkeley, CA (US);
Edward Nichols, Berkeley, CA (US);
Hong Zhang, El Sobrante, CA (US);
Richard A. Rosthal, Richmond, CA (US);
Brian Clark, Sugar Land, TX (US);
Frank Morrison, Berkeley, CA (US);
Edward Nichols, Berkeley, CA (US);
Hong Zhang, El Sobrante, CA (US);
Richard A. Rosthal, Richmond, CA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.