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. 12, 2025
Filed:
Mar. 23, 2023
Halliburton Energy Services, Inc., Houston, TX (US);
Board of Regents, the University of Texas System, Austin, TX (US);
Nazli Demirer, Tomball, TX (US);
Robert P. Darbe, Tomball, TX (US);
Alexander Mathew Keller, Austin, TX (US);
Dongmei Chen, Austin, TX (US);
HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US);
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, Austin, TX (US);
Abstract
Aspects of the subject technology relate to systems and methods of controlling a drill string having a steerable bit when drilling a wellbore through a substrate. A deterministic model of a directional behavior of the drill string is developed that includes a drill string state, one or more drill parameters associated with the drill string, and one or more substrate parameters associated with the substrate. A stochastic differential model of the directional behavior of the drill string is then developed by replacing the state and each of the parameters of the deterministic model with respective probability distributions and adding feedback. The stochastic differential model is reduced to a truncated stochastic model by substituting a predetermined number of terms of a generalized polynomial chaos expansion for each probability distribution and then evaluating the expectations.