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. 04, 1998
Filed:
Nov. 21, 1996
Robin Adrianus Hartmann, Rijswijk, NL;
Shell Oil Company, Houston, TX (US);
Abstract
A method of qualifying a survey of a borehole formed in an earth formation is provided. The method includes the steps of a) selecting a sensor for measuring an earth field parameter and a borehole position parameter in said borehole, b) determining theoretical measurement uncertainties of said parameters when measured with the sensor, c) operating said sensor so as to measure the position parameter and the earth field parameter at a selected position in the borehole, d) determining the difference between the measured earth field parameter and a known magnitude of said earth field parameter at said position, and determining the ratio of said difference and the theoretical measurement uncertainty of the earth field parameter, and e) determining the uncertainty of the measured position parameter from the product of said ratio and the theoretical measurement uncertainty of the position parameter.