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Device and method for measuring two-dimensional strain of well wall surface

A technology of two-dimensional strain and measurement method, applied in measurement devices, instruments, etc., can solve the problems of inability to measure, short sensor survival time, etc., to achieve the effect of prolonging the survival time, avoiding foreign body damage, and good control

Inactive Publication Date: 2014-12-10
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for measuring the two-dimensional strain on the surface of the well wall to solve the problems in the prior art that the sensor has a short survival time and cannot be measured in the harsh environment of rich water

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  • Device and method for measuring two-dimensional strain of well wall surface
  • Device and method for measuring two-dimensional strain of well wall surface
  • Device and method for measuring two-dimensional strain of well wall surface

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, the present invention will be further described:

[0029] The device for measuring the two-dimensional strain on the surface of the shaft wall includes: a self-sealing protective shell 1, a two-dimensional flexible strain sensitive unit 2, a data acquisition-transmission multifunctional unit 3, a high-performance battery pack 4, a sliding rod 6 and an inner sealing cover 8;

[0030] The self-sealing protective case 1 has a vertical sensitive unit concave chute 13 and a circumferential sensitive unit concave chute 14 for installing the two-dimensional flexible strain sensitive unit 2, and the self-sealing protective case 1 is provided with sliding bolt holes 9 and sealed sliding chamber 5; in the vertical sensitive unit concave chute 13 and the circumferential sensitive unit concave chute 14, two-dimensional flexible strain sensitive units 2 are placed; one end of two two-dimensional flexible strain sensitive units 2 is conn...

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Abstract

The invention discloses a device and a method for measuring two-dimensional strain of a well wall surface and belongs to devices and methods for measuring stress deformation of well walls. The device comprises a self-sealing type protective shell, two-dimensional flexible strain sensing units, a strain sensing unit concave slide groove, a data acquisition-transmission multifunctional unit, a high-performance storage battery pack and slide rods, wherein the protective shell is provided with slide bolt holes and slide cavities, and the slide rods are arranged in fixing bolt holes; the flexible strain sensing unit is of a microstructure gradient cylinder and composed of work blocks and compensation blocks; two-dimensional surface strain measuring devices are arranged on the well wall surface in a club shape, the data acquisition-transmission multifunctional unit acquires and stores strain and temperature information of the well wall in the strain sensing units, and data transmission in fixed time between a wellhead receiving equipment terminal and the surface strain measuring devices is realized in a wireless manner. The device is compact in structure, advanced in functions, high in applicability and capable of meeting requirements of stress deformation test and long-term evolution test of a rupture wall in a severe environment.

Description

technical field [0001] The invention relates to a device and a method for measuring the force deformation of the borehole wall, in particular to a device and a method for measuring the two-dimensional strain of the borehole wall surface. Background technique [0002] Shaft wall rupture disasters directly affect shaft safety and mine production. Well wall health and safety monitoring is an important means and basic premise to obtain the health status of the shaft wall and predict the occurrence of shaft wall rupture. At present, the commonly used monitoring sensor embedding methods in wellbore monitoring mainly include the wellbore slotting method and the wellbore surface installation method. In the well wall slotting method, the density and strength of the concrete in the slot and the well wall concrete are different, resulting in a deviation between the strain data and the real strain of the well wall. And the slotting construction takes up the hoisting time of the shaft, ...

Claims

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Application Information

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IPC IPC(8): G01B21/32
Inventor 周国庆赵晓东朱坤朋赖泽金林超吕亚
Owner CHINA UNIV OF MINING & TECH
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