Device and method for detecting underground accidents in geological drilling process

Abstract

The invention provides a device and a method for detecting underground accidents in the geological drilling process. The device is mainly composed of an underground instrument, a depth measuring unit, a high-performance computing workstation and detection software. Firstly, the small-size cable-free underground instrument is adopted for measuring the distance between an ultrasonic transducer and a fish fracture surface, the well wall diameter, the fracture surface and an ultrasonic image of the well wall, and meanwhile a pressure balance device is designed to improve the pressure resistance degree of the ultrasonic transducer in consideration of direct contact between the ultrasonic transducer and mud during work. Secondly, the depth measuring unit is additionally arranged in ground rope coring equipment to detect the depth of a fish to the ground, and in addition, a high-precision fitting algorithm is adopted for correcting depth measurement data in consideration of the tension influence of a winch steel wire rope. Finally, the high-performance computing workstation and the detection software are used for calculating the shape of the fracture surface of an underground drilling tool, the well wall diameter, the depth of the underground fractured drilling tool to the ground and three-dimensional ultrasonic images of the fracture surface and the well wall.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to an underground accident detection device and method in the geological drilling process. Background technique [0002] During the geological drilling process, there are complex geomechanical environments such as high temperature, high pressure, and high-steep structures, and drilling accidents such as broken drilling tools and overdiameter are prone to occur. It is difficult for on-site staff to judge the shape of the fracture surface and the diameter of the well, and they mainly select fishing tools based on experience, which has the problems of low fishing efficiency and high safety risks. [0003] Therefore, in geological drilling engineering, there is an urgent need for a downhole accident detection device that can detect the shape of the fracture surface of the downhole drilling tool, the diameter of the borehole wall, the depth of the downhole fractured drill ...

AI Technical Summary

Problems solved by technology

[0002] During the geological drilling process, there are complex geomechanical environments such as high temperature, high pressure, and high-steep structures, and drilling accidents such as broken drill tools and overdiameter are prone to occur

It is difficult for on-site staff to judge the shape of the fracture surface and the diameter of the well, and the fishing tools are mainly selected based on experience, which has the problems of low fishing efficiency and high safety risks

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