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

A beam and sound wave technology, applied in the field of sound wave inquiry, can solve the problem that the 1kHz sound wave cannot maintain the parallel uncertainty principle, and has not been proved to be achievable.

Inactive Publication Date: 2013-02-06
CHEVROU USA INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This 1kHz sound wave cannot be kept parallel without violating the uncertainty principle which is fundamental to the physics of wave diffraction
Not only that, mixing a 5MHz frequency to produce a 1kHz wave represents a frequency drop ratio of 5000:1, which has not been proven achievable in practice

Method used

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

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Embodiment Construction

[0054] figure 1 A generalized diagram of a device generating parallel beams according to an aspect of the present disclosure is shown. In some embodiments, one or more sources 110 are used to generate a first signal at a first frequency and a second signal at a second frequency. By way of non-limiting example, these signals can be generated using a 2-channel signal generator. Similar signal or function generators can also be used. Signals from the source are received by one or more signal amplifiers 120 and transmitted to one or more transducers 130, which are used to generate sound waves of the first or second frequency. The first frequency and the second frequency may be broadband, having a frequency range including a center frequency around which there is some spread of frequencies. Piezoelectric transducers are one type suitable for this application. If more than one transducer is used, they can be arranged in an array configuration. By way of non-limiting example, th...

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PUM

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Abstract

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.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of co-pending US Patent Application Serial No. 12 / 166,842, filed July 2, 2008, the entire contents of which are hereby incorporated by reference. [0003] government rights [0004] This invention was made with Government support under Contract No. DE-AC52-06NA35396 of the United States Department of Energy Award Cooperative Research and Development Agreement (CRADA). The United States Government may have certain rights in this invention. technical field [0005] In general, the present invention relates to acoustic interrogation of formations surrounding boreholes, and more particularly to the use of combinations of acoustic sources comprising a single transducer or array of transducers in a borehole connected to a nonlinear material to generate an acoustic beam, As a detection tool from the wellbore to inquire about the properties of rock formations and materials around the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/46
CPCG01V1/00G01V1/006G01V1/46
Inventor C·K·武D·N·辛哈C·潘缇K·T·尼赫伊D·P·施密特C·司科尔特
Owner CHEVROU USA INC
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