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Multipolar transmitting transducer of while-drilling multi-pole acoustic imaging logging instrument and working method of multipolar transmitting transducer

A technology for transmitting transducers and imaging logging, which is applied in the fields of seismology, earth-moving drilling, wellbore/well components, etc. for logging records. The effect of a small contact area

Active Publication Date: 2020-06-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transmitting transducer of the existing acoustic logging tool while drilling only has the function of monopole transmitting, so that the instrument is only suitable for the measurement of longitudinal wave time difference in fast formations, which is not conducive to effectively obtaining the time difference of compressional and shear waves and the full wave train in various formations information

Method used

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  • Multipolar transmitting transducer of while-drilling multi-pole acoustic imaging logging instrument and working method of multipolar transmitting transducer
  • Multipolar transmitting transducer of while-drilling multi-pole acoustic imaging logging instrument and working method of multipolar transmitting transducer
  • Multipolar transmitting transducer of while-drilling multi-pole acoustic imaging logging instrument and working method of multipolar transmitting transducer

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0039] Such as image 3 As shown, the multipole transmitting transducer of the multipole acoustic imaging logging tool while drilling according to the present invention is composed of four completely identical transmitting transducers, and a single transmitting transducer includes Cover plate 1, second gasket 2, elastic gasket 3, second protective cover 4, piezoelectric ceramic transducer 5, inner cover plate of transmitting transducer 6, lead liner 7, first protective cover 8, The first washer 9, the adjusting washer 10, the M4×12 hexagon socket head cap screw 12.

[0040] Such as Figure 5 , Figure 10 with Figure 11 As shown, the cross-sections of the outer cover plate 1 of the transmitting transducer and the inner cover plate 6 of the transmitting transducer are arc-shaped, and they ...

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Abstract

The invention provides a multipolar transmitting transducer of a while-drilling multi-pole acoustic imaging logging instrument and a working method of the multipolar transmitting transducer. In acoustic logging-while-drilling construction, the monopole radiation function and the quadrupole radiation function can be achieved by controlling the working phases of every two adjacent transmitting transducers, and when the two adjacent transmitting transducers work at the same phase, the monopole radiation function is achieved; when the two adjacent transmitting transducers work in opposite phases,the quadrupole radiation function is realized. In actual work of the instrument, monopole radiation and quadrupole radiation are alternately carried out, longitudinal and transverse waves of the stratum can be effectively excited, and the purpose of multi-pole acoustic logging while drilling is achieved.

Description

technical field [0001] The invention belongs to the field of petroleum engineering service logging equipment, and relates to a multipole acoustic imaging logging instrument while drilling in petroleum logging, in particular to a multipole transmitting transducer and a working method of the multipole acoustic imaging logging instrument while drilling. Background technique [0002] The main task of sonic logging while drilling is to obtain various formation longitudinal and shear wave information in real time and effectively through instruments during the drilling process, and use this information to calculate rock mechanical parameters, predict formation pore pressure, correct formation models, and optimize drilling plans, etc. Work. The transmitting transducer of the existing acoustic logging tool while drilling only has the function of monopole transmitting, so that the instrument is only suitable for the measurement of longitudinal wave time difference in fast formations, ...

Claims

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Application Information

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IPC IPC(8): G01V1/40G01V1/02E21B49/00
CPCG01V1/40G01V1/02E21B49/00
Inventor 李剑王灿云黄飞李玉霞陈辉娜路涛邹骁胡凯利
Owner BC P INC CHINA NAT PETROLEUM CORP
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