Unlock instant, AI-driven research and patent intelligence for your innovation.

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

A device and sound beam technology, applied in the field of acoustic exploration, can solve problems such as impracticality, long tool length of 4.5m, and difficulty in assembling logging lines

Inactive Publication Date: 2011-07-13
CHEVROU USA INC +1
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, mixing 5MHz frequencies to generate 1kHz waves implies a 5000:1 down-conversion ratio, which has not been proven achievable in practice
The 4.5m tool length proposed by Cowles is too long and impractical to fit in current logging lines

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 A generalized diagram of an apparatus for generating collimated beams according to an aspect of the invention 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, the signal may be generated by a 2-channel signal generator. Similar signal or function generators can be used. Signals from the source are received by one or more signal amplifiers 120 and sent to one or more transducers 130 for generating sound waves at first and second 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, the array configuration may be a linear, circular, filled circle, or square array. The transducers within the array may be divided into two groups, where a first group of transducers is driven by a so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

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.

Description

[0001] government rights [0002] This invention was made with Government support under a Cooperative Research and Development Agreement (CRADA) signed by the US Department of Energy (Contract No. DE-AC52-06NA25396). The government may have certain rights in this invention. technical field [0003] The present invention relates generally to the acoustic exploration of rock formations surrounding boreholes, and more particularly to the use of a combination of sound sources comprising a single transducer or array of transducers in a borehole coupled to a non-linear material to generate sound from the borehole as a detection tool. sound beam to detect the properties of rock formations and materials around the borehole. Background technique [0004] Acoustic exploration of subsurface features is often limited by the size and power of the actual source, and, in practice, the output of the downhole acoustic transducer is limited by the power transmission capabilities of the wirel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/52
CPCG01V1/46
Inventor C·K·武D·N·辛哈C·潘缇K·尼赫尔D·P·施密特C·司科尔特
Owner CHEVROU USA INC