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. 17, 2015
Filed:
Jun. 25, 2010
Emmanuel Legendre, Sevres, FR;
Thilo M. Brill, Chatenay-Malabry, FR;
Richard A. Rosthal, Richmond, CA (US);
Gerald N. Minerbo, Missouri City, TX (US);
Emmanuel Legendre, Sevres, FR;
Thilo M. Brill, Chatenay-Malabry, FR;
Richard A. Rosthal, Richmond, CA (US);
Gerald N. Minerbo, Missouri City, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The apparatus employs the remote field eddy-current (RFEC) inspection technique to electromagnetically measure physical parameters of a metallic pipe. RFEC devices inserted into and displaced along a cylindrical pipes may be used to measure the ratio of pipe thickness to electromagnetic skin-depth and thus allow for the non-invasive detection of flaws or metal loss. Typically these RFEC thickness measurements exhibit a so-called double-indication of flaws, an undesired artifact due to a double-peaked geometrical sensitivity function of the device. The method describes a means by which this double indication artifact may be removed by an appropriate processing of RFEC measurements performed by an apparatus specifically designed for this purpose. The invention is particularly well designed for applications in the oilfield industry.