公开(公告)号：US08233349B2

公开(公告)日：2012-07-31

申请号：US12870440

申请日：2010-08-27

申请人： Cung Khac Vu ,  Dipen N. Sinha ,  Cristian Pantea ,  Kurt T. Nihei ,  Denis P. Schmitt ,  Christopher Skelt

发明人： Cung Khac Vu ,  Dipen N. Sinha ,  Cristian Pantea ,  Kurt T. Nihei ,  Denis P. Schmitt ,  Christopher Skelt

IPC分类号： G01V1/00 ,  H04B1/02

CPC分类号： G01V1/46

摘要： 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.

摘要翻译： 在本发明的一些方面，公开了一种定位在井眼内的装置，其被配置为产生并将声束引导到围绕钻孔的岩层中。 该装置包括被配置为以第一频率产生第一信号的源和处于第二频率的第二信号; 被配置为接收产生的第一和第二信号并产生处于第一频率和第二频率的声波的换能器; 以及耦合到所述换能器的非线性材料，被配置为通过非线性混合过程产生具有等于所述第一频率和所述第二频率之间的差的频率的准直波束，其中所述非线性材料包括一个或 更多的液体，固体，颗粒材料，嵌入的微球体或乳液的混合物。

公开(公告)号：US08559269B2

公开(公告)日：2013-10-15

申请号：US12793407

申请日：2010-06-03

申请人： Cung Khac Vu ,  Dipen N. Sinha ,  Cristian Pantea ,  Kurt T. Nihei ,  Denis P. Schmitt ,  Chirstopher Skelt

发明人： Cung Khac Vu ,  Dipen N. Sinha ,  Cristian Pantea ,  Kurt T. Nihei ,  Denis P. Schmitt ,  Chirstopher Skelt

IPC分类号： G01V1/00

CPC分类号： G01V1/00 ,  G01V1/006 ,  G01V1/46

摘要： 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 acoustic wave at a first frequency; generating a second acoustic wave at a second frequency different than the first frequency, wherein the first acoustic wave and second acoustic wave are generated by at least one transducer carried by a tool located within the borehole; transmitting the first and the second acoustic waves into an acoustically non-linear medium, wherein the composition of the non-linear medium produces a collimated beam by a non-linear mixing of the first and second acoustic waves, wherein the collimated beam has a frequency based upon a difference between the first frequency range and the second frequency, and wherein the non-linear medium has a velocity of sound between 100 m/s and 800 m/s.

摘要翻译： 在本发明的一些方面，公开了一种在钻孔中产生声能束的方法。 该方法包括以第一频率产生第一声波; 在不同于所述第一频率的第二频率处产生第二声波，其中所述第一声波和第二声波由位于所述钻孔内的工具承载的至少一个换能器产生; 将第一和第二声波传输到声学非线性介质中，其中非线性介质的组成通过第一和第二声波的非线性混合产生准直波束，其中准直波束具有频率 基于所述第一频率范围和所述第二频率之间的差异，并且其中所述非线性介质具有在100m / s至800m / s之间的声速。

公开(公告)号：US6108606A

公开(公告)日：2000-08-22

申请号：US929955

申请日：1997-09-15

申请人： Valeri A. Korneev ,  Kurt T. Nihei ,  Larry R. Myer

发明人： Valeri A. Korneev ,  Kurt T. Nihei ,  Larry R. Myer

IPC分类号： G01V1/42 ,  G01V3/30

CPC分类号： G01V1/42 ,  G01V3/30

摘要： A method for detection of a disturbance in a waveguide comprising transmitting a wavefield having symmetric and antisymmetric components from a horizontally and/or vertically polarized source and/or pressure source disposed symmetrically with respect to the longitudinal central axis of the waveguide at one end of the waveguide, recording the horizontal and/or vertical component or a pressure of the wavefield with a vertical array of receivers disposed at the opposite end of the waveguide, separating the wavenumber transform of the wavefield into the symmetric and antisymmetric components, integrating the symmetric and antisymmetric components over a broad frequency range, and comparing the magnitude of the symmetric components and the antisymmetric components to an expected magnitude for the symmetric components and the antisymmetric components for a waveguide of uniform thickness and properties thereby determining whether or not a disturbance is present inside the waveguide.

摘要翻译： 一种用于检测波导中的干扰的方法，包括从水平和/或垂直偏振的源极和/或垂直极化的源极和/或压力源发射具有对称和反对称分量的波场，所述波场相对于波导的纵向中心轴对称设置在波导的一端 波导，用设置在波导的相对端的接收器的垂直阵列记录波场的水平和/或垂直分量或压力，将波场的波数变换分离成对称和反对称分量，整合对称和反对称 分量，并且将对称分量和反对称分量的大小与用于均匀厚度和性质的波导的对称分量和反对称分量的预期幅度进行比较，从而确定是否存在干扰在 波导。