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:
Aug. 19, 2008
Filed:
Jul. 10, 2003
Dean M. Homan, Sugar Land, TX (US);
Richard A. Rosthal, Houston, TX (US);
Gerald N. Minerbo, Missouri City, TX (US);
Thomas D. Barber, Houston, TX (US);
Dean M. Homan, Sugar Land, TX (US);
Richard A. Rosthal, Houston, TX (US);
Gerald N. Minerbo, Missouri City, TX (US);
Thomas D. Barber, Houston, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Techniques for calibrating an electromagnetic logging tool equipped with a plurality of antennas, with at least one antenna having its axis at an angle with respect to a tool axis, include disposing a test loop about the tool such that an axis of the tool and a plane on which the test loop lies form a tilt angle that is between about 0 and 90 degrees. An induced signal is measured at one of the antennas by energizing another of the antennas. Embodiments analyze the induced signal corresponding to a max or min extrema associated with a coupling effect due to the test loop. In other embodiments a corrected signal is compared with a calculated signal.