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:
Jul. 21, 2020
Filed:
Nov. 27, 2017
Hrl Laboratories, Llc, Malibu, CA (US);
Logan D. Sorenson, Thousand Oaks, CA (US);
Shuoqin Wang, Oak Park, CA (US);
David L. Walter, Los Angeles, CA (US);
Adour V. Kabakian, Monterey Park, CA (US);
Keerti S. Kona, Woodland Hills, CA (US);
Hung Nguyen, Los Angeles, CA (US);
Raviv Perahia, Agoura Hills, CA (US);
David Chang, Calabasas, CA (US);
HRL Laboratories, LLC, Malibu, CA (US);
Abstract
Described is a system for estimating a trajectory of a borehole. The system processes signals of sensor streams obtained from an inertial sensor system. Using the set of processed signals, the system determines whether a drill is in a survey mode state or a continuous mode state, and a measured depth of the borehole is determined. A set of survey mode positioning algorithms is applied when the drill is stationary. A set of continuous mode navigation algorithms is applied when the drill is non-stationary. Using at least one Kalman filter, results of the set of survey mode positioning algorithms and the set of continuous mode navigation algorithms are combined. An estimate of a borehole trajectory and corresponding ellipse of uncertainty (EOU) is generated using the combined results.