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. 08, 2025
Filed:
Mar. 15, 2022
Applicant:
Magnetic Variation Services, Llc, Denver, CO (US);
Inventors:
Marc Ernest Willerth, San Luis Obispo, CA (US);
Stefan Maus, Boulder, CO (US);
Assignee:
MAGNETIC VARIATION SERVICES, LLC, Denver, CO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/22 (2012.01); E21B 7/04 (2006.01); E21B 44/06 (2006.01); E21B 47/024 (2006.01); E21B 47/04 (2012.01); E21B 47/092 (2012.01); E21B 47/12 (2012.01); G01V 3/00 (2006.01);
U.S. Cl.
CPC ...
E21B 47/092 (2020.05); E21B 7/04 (2013.01); E21B 44/06 (2013.01); E21B 47/024 (2013.01); E21B 47/04 (2013.01); E21B 47/12 (2013.01); G01V 3/00 (2013.01);
Abstract
A method of validating a directional survey includes measuring the gravity and magnetic field vectors using a surveying tool and computing an overall statistical distance of the measurement. The statistical distance may be calculated from reference values associated with the surveying tool using corresponding surveying tool codes with error values. In a further aspect, an error covariance matrix may be used to determine whether the new errors in a survey are consistent or not with errors from one or more previous surveys.