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. 18, 2015
Filed:
Nov. 09, 2011
Cung Khac VU, Houston, TX (US);
Christopher Skelt, Houston, TX (US);
Kurt Nihei, Oakland, CA (US);
Paul A. Johnson, Santa Fe, NM (US);
Robert Guyer, Reno, NV (US);
James A. Ten Cate, Los Alamos, NM (US);
Pierre-yves Le Bas, Los Alamos, NM (US);
Carène S. Larmat, Los Alamos, NM (US);
Cung Khac Vu, Houston, TX (US);
Christopher Skelt, Houston, TX (US);
Kurt Nihei, Oakland, CA (US);
Paul A. Johnson, Santa Fe, NM (US);
Robert Guyer, Reno, NV (US);
James A. Ten Cate, Los Alamos, NM (US);
Pierre-Yves Le Bas, Los Alamos, NM (US);
Carène S. Larmat, Los Alamos, NM (US);
LOS ALAMOS NATIONAL SECURITY LLC, Los Alamos, NM (US);
CHEVRON U.S.A. INC., San Ramon, CA (US);
Abstract
A method of interrogating a formation includes generating a conical acoustic signal, at a first frequency—a second conical acoustic signal at a second frequency each in the between approximately 500 Hz and 500 kHz such that the signals intersect in a desired intersection volume outside the borehole. The method further includes receiving, a difference signal returning to the borehole resulting from a non-linear mixing of the signals in a mixing zone within the intersection volume.