Multipole acoustic wave imaging well logging-while-drilling device

Abstract

The invention discloses a multipole acoustic wave imaging well logging-while-drilling device. According to the device, one end of a sound receiving system is connected with a sound emitting system through a screw thread to form an integrated structure, a sound insulator is arranged at the lower end of the sound receiving system, the interiors of the sound emitting system, the sound receiving system and the sound insulator communicate with one another to form a central water hole, a central flow guide pipe is arranged in the central water hole, a multipole receiving transducer module and a receiving main control circuit module framework are arranged on the sound receiving system, a four-pole emitting transducer, a single-pole emitting transducer and an emitting excitation circuit module framework are arranged on the sound emitting system, the two ends of the central flow guide pipe are connected with the receiving main control circuit module framework and the emitting excitation circuitmodule framework through sealing pressure-bearing connecting devices correspondingly, a receiving main control circuit module is arranged on the receiving main control circuit module framework, and an emitting excitation circuit module is arranged on the emitting excitation circuit module framework. The device can improve well drilling operation, and improve the well drilling safety coefficient.

Description

technical field [0001] The invention belongs to the technical field of oil fields, and in particular relates to a multipole acoustic imaging logging device while drilling. Background technique [0002] The multipole acoustic imaging logging tool while drilling can solve the following key technical problems in drilling engineering and oil and gas exploration: [0003] 1) The combination of acoustic waves while drilling and seismic can solve the urgently needed problems of timely prediction of formation pressure before drilling and evaluation of wellbore stability. [0004] 2) Acoustic logging while drilling is used in deep water exploration to solve the problems of time-depth conversion with seismic data and elastic wave impedance inversion of formation longitudinal and shear wave velocities. [0005] 3) Acoustic logging while drilling is used to solve problems in oil and gas evaluation and geosteering. Compared with neutron and density logging while drilling, measuring form...

AI Technical Summary

Problems solved by technology

The existing domestic sonic logging while drilling only has the monopole function, which is suitable for longitudinal wave measurement in fast formations. It is necessary to develop a sonic logging while drilling with Reliable P- and S-wave measurements in both

In addition, it is necessary to solve the problem that the existing acoustic logging while drilling instrument with integrated design is too long, and the processing is difficult, which leads to long processing cycle and difficulty in ensuring the reliability and consistency of the instrument, and is not conducive to the development of on-site maintenance work.

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