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. 03, 2021
Filed:
Mar. 09, 2017
Triad National Security, Llc, Los Alamos, NM (US);
Chevron U.s.a. Inc., San Ramon, CA (US);
Paul A. Johnson, Santa Fe, NM (US);
Timothy J. Ulrich, II, Los Alamos, NM (US);
Pierre-Yves Le Bas, Los Alamos, NM (US);
Robert A. Guyer, Los Alamos, NM (US);
Harvey E. Goodman, Houston, TX (US);
Marcel C. Remillieux, Los Alamos, NM (US);
TRIAD NATIONAL SECURITY, LLC, Los Alamos, NM (US);
CHEVRON U.S.A. INC., San Ramon, CA (US);
Abstract
Apparatus () and methods for combining time reversal and elastic nonlinearity of formation materials for qualtitatively probing for over-pressured regions down hole in advance of a well drilling bit, to determine the distance to the over-pressured region, and for accurately measuring pore pressure downhole in a formation, are described. Classical and reciprocal time reversal methods may be utilized to achieve these measurements.