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:
Apr. 22, 2014
Filed:
Apr. 01, 2009
Cyrille Levesque, San Francisco, CA (US);
David Alumbaugh, Berkeley, CA (US);
Richard Rosthal, Richmond, CA (US);
Hong Zhang, El Sobrante, CA (US);
Cyrille Levesque, San Francisco, CA (US);
David Alumbaugh, Berkeley, CA (US);
Richard Rosthal, Richmond, CA (US);
Hong Zhang, El Sobrante, CA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Methods and related systems are described for making an electromagnetic induction survey of a formation surrounding a cased section of a borehole. An electromagnetic transmitter and/or receiver are deployed into the cased section of the borehole. One or more additional devices are used to measure the properties of a conductive casing relating to conductivity, thickness and magnetic permeability. A casing coefficient is then calculated that can then be used for the processing of the deep-sensing induction measurements.