Ultrasonic logging system using self-orienting device of ultrasonic logging instrument

Abstract

The invention provides an ultrasonic logging system using a self-orienting device of an ultrasonic logging instrument. The system comprises a down-hole meter which is connected with a depth gauge and a logging winch by an armoured cable bypassing a pulley, wherein the logging winch is connected with a ground workstation; the depth gauge is arranged for measuring the laid down depth of the down-hole meter; a main device of the down-hole meter is fixed with an optical fiber top inside so as to measure the self-orienting direction of the down-hole meter; an energy converter device is provided with a plurality of uniformly distributed energy converters; the energy converter sends an ultrasonic wave and receives an echo aperture of a measuring well; and the ground workstation performs the single-step linear prediction interpolation on the orienting direction data of the optical fiber top, performs the linear interpolation on the depth of the depth gauge, performs the linear interpolation on the aperture value measured by the energy converter, and calculates and acquires a solid pattern and a parameter of a rockshaft. The invention provides an ultrasonic logging system using a self-orienting device of an ultrasonic logging instrument which promotes the self-orienting precision of the ultrasonic logging instrument and widens the measuring scope of the down-hole meter.

Description

technical field [0001] The invention relates to an ultrasonic well logging system, in particular to an ultrasonic well logging system using a directional device applied to the ultrasonic well logging tool itself to accurately determine the measurement orientation. Background technique [0002] Underground drilling and diaphragm walls are concealed projects. When the instrument is lowered into it for measurement, it will rotate due to the torsion of the wire rope suspending the instrument. Without a certain positioning method, the personnel on the ground cannot know The rotation of the instrument. The orientation methods available for logging tools include double wire rope steering, marker wire rope orientation, fluxgate, magnetic compass and gyroscope. [0003] The "SKD-1 large-diameter ultrasonic logging tool" and "SD-1 deep well logging tool" of Shandong University of Science and Technology use double wire rope guidance. This method is simple and reliable. The disadvantag...

AI Technical Summary

Problems solved by technology

At that time, mechanical gyro orientation was used, but its structure was complex, easily damaged, poor shock resistance, low precision and not stable enough.

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