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System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area

A technology of relative displacement and oil and gas pipelines, which is applied in pipeline systems, mining equipment, mining equipment, etc., can solve the problems of unseen mined-out area pipe soil, etc., and achieve the effect of reducing construction risks and ensuring safe operation

Inactive Publication Date: 2012-02-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Due to these advantages, in the field of geotechnical engineering, fiber grating sensors are easy to embed in rock and soil for high-resolution and wide-range measurement of internal strain and temperature. The technical advantages are very obvious, especially in the ability to obtain long-term, Reliable deformation data of rock and soil, there is no report on the application of fiber grating sensing technology in the monitoring of relative displacement of pipe and soil in goaf

Method used

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  • System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area
  • System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area
  • System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area

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Embodiment

[0059] Embodiment. This example is an experimental method and system, and its constitution is as Figure 1-Figure 6 shown. The test was carried out in a goaf subsidence area with mining depth ratio of 10, mining length of 15m, pipeline buried depth of 3m and pipeline length of 130m. The diameter of the pipeline is 168mm, the wall thickness is 6mm, and the steel grade is L245.

[0060] The overall composition of the pipe-soil relative displacement monitoring system for oil and gas pipelines in the goaf subsidence area is as follows: figure 1 shown. Install the pipe-soil relative displacement sensor a3 on the monitoring section of the oil and gas pipeline a2 in the goaf subsidence area 1, and then connect the optical cable a5 leading to the monitoring station through the optical fiber junction box a4. In the monitoring station, the optical cable a5 is connected to the optical switch 6 , the optical switch 6 is connected to the fiber grating demodulator 7, the fiber grating dem...

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PUM

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Abstract

The invention discloses a system for monitoring pipe-soil relative displacement of an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. A pipe-soil relative displacement sensor a (3) is arranged on the monitoring section of an oil-gas pipeline a (2) of a mining subsidence area (1), and is connected with an optical cable a (5) which is led to a monitoring station through a fiber junction box (4); in the monitoring station, the optical cable a (5) is connected with an optical switch (6); the optical switch (8) is connected with a fiber grating demodulator (7); the demodulator (7) is connected with a lower computer (8); and data preprocessed with the lower computer (8) are transmitted through a wireless communication module a (9), received by a wireless communication module b (10) and transmitted to an upper computer (11). The system has high space resolution and low cost, and is safe and effective.

Description

technical field [0001] The invention relates to a system for monitoring relative displacement of oil and gas pipelines in goaf subsidence areas based on optical fiber grating sensing technology, and relates to the technical fields of stress measurement, temperature measurement, similar linear dimension measurement and pipeline systems. Background technique [0002] The space formed after the underground mine is mined is called the goaf. After the underground mineral layer is mined, the upper rock layer loses its support, the balance condition is destroyed, and then it bends and collapses, so that the surface sinks and deforms, causing the surface to subside and form a depression. With the continuous expansion of the goaf, the depression continues to develop and form the goaf subsidence area, which will cause damage to the above-ground or underground buildings (structures). Goaf subsidence disaster is one of the main forms of geological disasters that cause loss of human lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/00G01B11/16G01B11/02E21F17/18
Inventor 马云宾吴张中荆宏远韩冰邱红辉蔡永军孙异李俊杨喜良
Owner PETROCHINA CO LTD
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