Intelligent ultrasonic-imaging logging unit for coal-bed gas exploration

Abstract

The invention relates to an intelligent ultrasonic-imaging logging unit for coal-bed gas exploration. The intelligent ultrasonic-imaging logging unit for the coal-bed gas exploration comprises a controller, an exploration mechanism and two support mechanisms. The exploration mechanism comprises a sliding component and an exploring component. The exploring component comprises a first motor, an energy converter and two balance components. The balance component comprises a regulating unit, a support rod, a hinging block, an air cylinder and a piston. The sliding component comprises a sliding rail, a sliding ring and two fastening units. The fastening unit comprises a second motor, a driving wheel, a fixing shaft, a frame, a fastening rod and an extruding block. The intelligent ultrasonic-imaging logging unit for the coal-bed gas exploration is capable of, through the rotation and ascending of the energy converter in the exploration mechanism, scanning the well wall of a well, using the fastening units to fix the position of a connection block in a scanning process, and preventing the shaking of the energy converter from affecting the imaging quality. In addition, the piston bears against the well wall through the balance components, and the energy converter can be conveniently and stably ascended in the positions with the different well diameters, so the practicability of the device is improved.

Description

technical field [0001] The invention relates to the field of coalbed gas detection equipment, in particular to an intelligent ultrasonic imaging logging device for coalbed gas detection. Background technique [0002] Coalbed methane logging refers to the difference in lithology and physical properties between coalbed methane reservoir (coal seam) and surrounding rock, using natural potential, double lateral (or induction), microelectrode, compensation density, natural gamma ray, acoustic time difference, acoustic wave The full wave train, neutron porosity, and caliper logging are used to log them. Among them, acoustic logging refers to the use of acoustic characteristics such as changes in velocity, amplitude, and frequency when sound waves propagate in different rocks. It is a logging method to study the drilling geological section and judge the cementing quality. The sonic logging is divided into compensated sonic logging, long-distance sonic logging, array sonic logging, ...

AI Technical Summary

Problems solved by technology

Drilling wells have different diameters, which brings great difficulties to logging work

The centralizer mechanism of the existing ultrasonic imaging logging device is fixed, and the position of the tool axis cannot be adjusted according to the size of the borehole diameter, causing the transducer to deviate at the position with a larger borehole diameter and get stuck at a position where the borehole diameter becomes smaller , it is difficult to keep the transducer rising steadily, which not only affects the safety of logging tools, but also affects the interpretation and processing of logging data

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