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Device for monitoring deformation of frozen wall of shaft

A deformation monitoring and monitoring device technology, applied in the direction of wellbore/well parts, earthwork drilling and production, etc., can solve the problems of real-time performance, poor accuracy, high labor intensity, manual inspection, etc., and achieve good accuracy, high precision and long service life long effect

Inactive Publication Date: 2014-06-04
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The existing deformation monitoring adopts the method of setting the vertical line of the steel ball, which has poor real-time performance and accuracy, requires manual inspection, and has high labor intensity

Method used

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  • Device for monitoring deformation of frozen wall of shaft
  • Device for monitoring deformation of frozen wall of shaft
  • Device for monitoring deformation of frozen wall of shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Such as figure 1 A wellbore frozen wall deformation monitoring device shown includes an optical fiber sensing device embedded in the frozen wall monitoring hole 23 for monitoring and a monitoring device located outside the wellbore. The signal optical fiber 6 contained in the optical fiber sensing device Connect with the monitoring device 5 through the optical cable 1;

[0025] The optical fiber sensing device includes a protective tube 20 and a circular tube 10 located in the protective tube 20, along the longitudinal direction of the circular tube 10, a slit 4 is distributed on the circular tube 10, and A Side deformation teeth 4-1 and B side deformation teeth 4-2, A side deformation teeth 4-1 and B side deformation teeth 4-2 correspond to each other alternately, A side deformation teeth 4-1 correspond to B side deformation teeth 4-2 Arranged on both sides of the signal optical fiber 6, the signal optical fiber 6 is connected to the monitoring device 5 outside the we...

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Abstract

The invention discloses a device for monitoring deformation of a frozen wall of a shaft. The device for monitoring the deformation of the frozen wall of the shaft comprises an optical fiber sensing device and a monitoring device, wherein the optical fiber sensing device is buried in a frozen wall monitoring hole and is used for monitoring, the monitoring device is located outside the shaft, signal optical fibers which are arranged in the optical fiber sensing device are connected with the monitoring device through an optical cable, the optical fiber sensing device comprises a protective tube and a round tube located in the protective tube, a gap is distributed in the round tube in the longitudinal direction of the round tube, A side deformation teeth and B side deformation teeth are arranged on the two opposite sides of the gap respectively, the A side deformation teeth and the B side deformation teeth are mutually staggered, mutually correspond and are correspondingly arranged on the two sides of the signal optical fibers, and the signal optical fibers are connected with the monitoring device located outside the shaft through the optical cable located in a cavity of the round tube.

Description

technical field [0001] The invention belongs to an optical fiber sensing device, in particular to a distributed optical fiber sensing device for monitoring the deformation of the frozen wall of a shaft. Background technique [0002] Freezing method sinking is a construction method that uses artificial refrigeration technology to temporarily reinforce unstable strata and isolate groundwater. The freezing method is widely used in the construction of geological mines. It is a reliable construction method for solving unstable water-bearing soil layers such as silt and quicksand and rock water. , its essence is to use artificial refrigeration to temporarily consolidate the formation. In the implementation of this method, it is necessary to monitor the deformation of the frozen wall of the wellbore to prevent safety accidents caused by the collapse of the frozen wall. The existing deformation monitoring adopts the method of setting the vertical line of the steel ball, which has po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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