Acoustic transducer and logging device thereof

An acoustic wave transducer, one-sided technology, applied in measurement, wellbore/well components, earthwork drilling and production, etc., can solve the problem of acoustic wave signal propagation attenuation, and achieve high sensitivity effect

Active Publication Date: 2015-05-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides an acoustic wave transducer and its logging device, which is used to solve the problem that the existing acoustic wave logging device needs to be provided with a sound-permeable structure, so the sound wave signal is greatly attenuated during propagation

Method used

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  • Acoustic transducer and logging device thereof
  • Acoustic transducer and logging device thereof
  • Acoustic transducer and logging device thereof

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0032] Such as figure 1 and figure 2 As shown, it is a schematic structural view of an acoustic wave transducer 10 in an embodiment of the present invention and a schematic cross-sectional view thereof along the A-A direction, which includes: a metal substrate 101, a piezoelectric ceramic sheet 102; wherein: the piezoelectric ceramic sheet One side of 102 is fixed on the first surface of the metal substrate 101, and the second surface of the metal substrate 101 can be in direct contact with the liquid in the well. Preferably, one side of the piezoelectric ceramic sheet 102 is bonded to th...

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Abstract

An embodiment of the invention relates to the acoustic logging field, in particular to an acoustic transducer and a logging device thereof. The acoustic transducer comprises a metal substrate and a piezoelectric ceramic piece, wherein one side of the piezoelectric ceramic piece is fixed on a first surface of the metal substrate, and a second surface of the metal substrate is directly contacted with fluids in a well. Accordingly, a sound permeable structure can be not needed, signal attenuation caused by various media during acoustic signal transmission can be reduced; and simultaneously, good acoustic emission efficiency or good acoustic signal receiving sensitivity is provided, and acoustic logging operation can be completed directly and effectively.

Description

technical field [0001] The invention relates to the field of acoustic logging, in particular to an acoustic transducer and logging device thereof. Background technique [0002] Acoustic logging is playing an increasingly important role in formation evaluation, petroleum engineering, oil production engineering and other fields. Using acoustic logging technology can obtain formation porosity, permeability, wave energy attenuation, reflection and transmission, and various formation parameters. Anisotropy and other formation evaluation parameters are widely used. [0003] Acoustic transducers for traditional well logging need to be sealed in field instruments, such as pressure-bearing acoustic sub-joints. In order to isolate the piezoelectric ceramic sheet of the acoustic transducer from the well fluid, sealing materials need to be installed sequentially from the inside to the outside. (such as heat-resistant rubber), metal shell, etc., the acoustic signal propagation in this k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/14E21B49/00
Inventor 卢俊强鞠晓东乔文孝赵宏林车小花
Owner BC P INC CHINA NAT PETROLEUM CORP
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