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:
Sep. 04, 2012
Filed:
Aug. 27, 2010
Cung Khac VU, Houston, TX (US);
Dipen N. Sinha, Los Alamos, NM (US);
Cristian Pantea, Los Alamos, NM (US);
Kurt T. Nihei, Oakland, CA (US);
Denis P. Schmitt, Katy, TX (US);
Christopher Skelt, Houston, TX (US);
Cung Khac Vu, Houston, TX (US);
Dipen N. Sinha, Los Alamos, NM (US);
Cristian Pantea, Los Alamos, NM (US);
Kurt T. Nihei, Oakland, CA (US);
Denis P. Schmitt, Katy, TX (US);
Christopher Skelt, Houston, TX (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency and a second signal at a second frequency; a transducer configured to receive the generated first and the second signals and produce acoustic waves at the first frequency and the second frequency; and a non-linear material, coupled to the transducer, configured to generate a collimated beam with a frequency equal to the difference between the first frequency and the second frequency by a non-linear mixing process, wherein the non-linear material includes one or more of a mixture of liquids, a solid, a granular material, embedded microspheres, or an emulsion.