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

United States Patent

October 1, 2013
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 method of generating a beam of acoustic energy in a borehole is disclosed. The method includes generating a first broad-band acoustic pulse at a first broad-band frequency range having a first central frequency and a first bandwidth spread; generating a second broad-band acoustic pulse at a second broad-band frequency range different than the first frequency range having a second central frequency and a second bandwidth spread, wherein the first acoustic pulse and second acoustic pulse are generated by at least one transducer arranged on a tool located within the borehole; and transmitting the first and the second broad-band acoustic pulses into an acoustically non-linear medium, wherein the composition of the non-linear medium produces a collimated pulse by a non-linear mixing of the first and second acoustic pulses, wherein the collimated pulse has a frequency equal to the difference in frequencies between the first central frequency and the second central frequency and a bandwidth spread equal to the sum of the first bandwidth spread and the second bandwidth spread.
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), Los Alamos National Security LLC (Los Alamos, NM)
12/ 793,420
June 3, 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.