Device and method for detecting underground accidents in geological drilling process

A detection device and geological drilling technology, applied in the field of geological exploration, can solve problems such as difficulty in judging the shape of the fracture surface and well diameter, easy occurrence of broken drilling tools, overdiameter, and low efficiency of fishing operations, so as to improve transmission reliability and improve Safety and the effect of improving the degree of pressure resistance

Active Publication Date: 2021-04-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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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...

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  • Device and method for detecting underground accidents in geological drilling process
  • Device and method for detecting underground accidents in geological drilling process
  • Device and method for detecting underground accidents in geological drilling process

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] Please refer to figure 1 , the present invention provides a downhole accident detection device and method in geological drilling process,

[0022] A downhole accident detection device in the geological drilling process, including a battery pack 1, a circuit board 2, a motor 12, a rotating shaft 14, a combined sealing ring 22, a first ultrasonic transducer 151, a second ultrasonic transducer 152, a first instrument The outer tube 23, the second instrument outer tube 24 and the third instrument outer tube 25; the lower end of the rotating shaft 14 is provided with a first ultrasonic transducer 151 and a second ultrasonic transducer 152; the battery pack 1, circuit Plate 2, motor 12, rotating shaft 14, and combined sealing ring 22 are sequentially c...

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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 ...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/14E21B47/01
CPCE21B47/00E21B47/14E21B47/01
Inventor 甘超汪祥曹卫华吴敏
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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