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System for generating a beam of acoustic energy from a borehole, and applications thereof

United States Patent

July 31, 2012
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
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.
Vu; Cung Khac (Houston, TX), Sinha; Dipen N. (Los Alamos, NM), Pantea; Cristian (Los Alamos, NM), Nihei; Kurt T. (Oakland, CA), Schmitt; Denis P. (Katy, TX), Skelt; Christopher (Houston, TX)
Chevron U.S.A. Inc. (San Ramon, CA)
12/ 870,440
August 27, 2010
GOVERNMENT RIGHTS This invention was made with Government support under Cooperative Research and Development Agreement (CRADA) Contract Number DE-AC52-06NA25396 awarded by the United States Department of Energy. The Government may have certain rights in this invention.