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. 18, 2006
Filed:
Apr. 27, 2004
Harold J. Engebretson, Longbranch, WA (US);
Brett H. Van Steenwyk, San Luis Obispo, CA (US);
Harold J. Engebretson, Longbranch, WA (US);
Brett H. Van Steenwyk, San Luis Obispo, CA (US);
Scientific Drilling International, Houston, TX (US);
Abstract
A method is provided for computing the differential azimuth between two sets of spaced-apart gravity component measurement devices in a borehole, employing multiple rotation angles. The method includes modeling relationships of axes as defined; forming equations relating rotation angles to outputs of gravity measuring devices; solving such equations to derive the values representative of all of the rotation angles, using measured values of the outputs from the first and second sets of gravity component measuring devices, and computing from the values of the rotation angles the differential azimuth angle between the first set and the second set of gravity measuring devices.