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Freeze soil area oil and gas pipeline displacement monitoring method and system

A technology for monitoring oil and gas pipelines and displacement, which is applied to measuring devices, instruments, and optical devices, etc. It can solve the problems of no mature monitoring technology, complex formation mechanism of frost heave and thaw subsidence disasters, and different characteristics of frozen soil.

Active Publication Date: 2013-11-06
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although domestic and foreign pipeline operators have taken active measures to deal with frost heaving and thawing disasters in permafrost regions, the formation mechanism of frost heaving and thawing disasters is very complicated, and the characteristics of permafrost in different regions are different. There is no mature monitoring technology that can monitor the impact of frost heaving and thawing disasters on pipelines

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  • Freeze soil area oil and gas pipeline displacement monitoring method and system
  • Freeze soil area oil and gas pipeline displacement monitoring method and system
  • Freeze soil area oil and gas pipeline displacement monitoring method and system

Examples

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Embodiment

[0060] Embodiment. This example is a kind of test method, and in the permafrost region that the thickness of seasonal frozen soil is 2m, and the frozen soil type is ice-rich and saturated ice, the test is carried out, wherein the buried depth of the pipeline is 2m, and the diameter of the pipe body is 813mm, wall thickness 10mm, steel grade X65.

[0061] The overall composition of the displacement monitoring system for oil and gas pipelines in permafrost regions is as follows: figure 2 shown; the principle block diagram is shown in Figure 5 shown. On the side of the oil and gas pipeline 2 in the permafrost region 1, fiber grating displacement sensors 10, 11 are installed, all sensors are fused in series, and then lead to the monitoring station through the optical cable 12, the optical cable 12 is connected with the optical switch 13, and the optical switch 13 is connected with the optical fiber The grating demodulator 14 is connected, the fiber grating demodulator 14 is co...

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Abstract

The invention discloses a freeze soil area oil and gas pipeline displacement monitoring method and system. A plurality of fiber bragg grating displacement sensors a (10) and a plurality of fiber bragg grating displacement sensors b (11) are arranged on one sides of oil and gas pipelines (2) in a freeze soil area, all the sensors are connected in series in a welding mode and then introduced into a monitoring station through optical cables (12), the optical cables (12) are connected with a photoswitch (13), the photoswitch (13) is connected with a fiber bragg grating interrogator (14), the fiber bragg grating interrogator (14) is connected with a lower computer (15), data preprocessed by the lower computer (15) are transmitted to a low-orbit satellite (17) through a satellite communication module (16), data are forwarded by the low-orbit satellite (17) to a satellite communication module (18), and received data are transmitted by the satellite communication module (18) to an upper computer (19) and analyzed and processed by the upper computer (19). The freeze soil area oil and gas pipeline displacement monitoring method and system are high in precision, high in stability and low in cost.

Description

technical field [0001] The invention is a method and system for monitoring the displacement of oil and gas pipelines in permafrost regions based on fiber grating sensing technology, and relates to the technical fields of length measurement, temperature measurement, other types of measurement, general control systems and pipeline systems. Background technique [0002] Frozen soil is a special kind of soil, the temperature is negative temperature or zero temperature, and the soil containing ice is called permafrost. According to the length of the frozen state of the soil, frozen soil can generally be divided into short-term frozen soil (a few hours to half a month), seasonal frozen soil (half a month to several months) and permafrost (more than two years). my country's permafrost is very developed. The permafrost area is about 2.11 million square kilometers, accounting for 23% of my country's total land area and ranking third in the world. The area of ​​permafrost is about 5.1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 马云宾张世斌陈朋超赵文杰蔡永军李增彬马涛肖海峰
Owner PIPECHINA SOUTH CHINA CO
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