A monitoring system for oil and gas pipelines in permafrost regions

A technology for oil and gas pipelines and monitoring systems, applied in measurement devices, heat measurement, instruments, etc., can solve the problems of complex formation mechanism of frost heave and thaw subsidence disasters, different characteristics of frozen soil, and no mature monitoring technology. The effect of networking, reducing construction risks and low cost

Active Publication Date: 2016-06-08
PIPECHINA SOUTH CHINA CO
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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

Method used

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  • A monitoring system for oil and gas pipelines in permafrost regions
  • A monitoring system for oil and gas pipelines in permafrost regions
  • A monitoring system for oil and gas pipelines in permafrost regions

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Embodiment

[0054] Embodiment. This example is a kind of test system, 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, the diameter of the pipe body is 813mm, the wall thickness 10mm, steel grade X65.

[0055] The overall composition of the oil and gas pipeline monitoring system in permafrost regions is as follows: figure 1 As shown, the principle block diagram is as Figure 5 shown. A temperature sensor group composed of fiber grating temperature sensor a3, fiber grating temperature sensor b4, and fiber grating temperature sensor c5 is installed on the surface of oil and gas pipeline a2 in permafrost region 1 and its surroundings, and a fiber grating water content sensor a6, Fiber Bragg grating water content sensor b7, fiber Bragg grating water content sensor c8, and fiber Bragg grating water content sensor d9 are composed of a w...

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Abstract

The invention is an oil and gas pipeline monitoring system in permafrost regions based on optical fiber grating sensing technology. Install a temperature sensor group on the surface of the oil and gas pipeline a(2) and its surroundings in the permafrost region (1), install a water content sensor group around the oil and gas pipeline a(2), and install a fiber grating displacement sensor on the side of the oil and gas pipeline a(2) The sensor group, all the sensors are connected in series, lead to the monitoring station by the optical cable (12), the optical cable (12) is connected with the optical switch (13), the optical switch (13) is connected with the fiber grating demodulator (14), and the fiber grating demodulator (14) is connected. The instrument adjustment (14) is connected with the lower computer (15), and the data preprocessed by the lower computer (15) is transmitted to the low-orbit satellite (17) through the satellite communication module a (16), and the low-orbit satellite (17) forwards the data to The satellite communication module b (18), the satellite communication module b (18) transmits the received data to the upper computer (19) for analysis and processing. The invention has high precision, high stability and low cost.

Description

technical field [0001] The invention relates to an oil and gas pipeline monitoring system in permafrost regions based on fiber grating sensing technology, and relates to the technical fields of length measurement, temperature measurement, other types of excluding 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 5.14 million square ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01K11/32G01N21/00G01K11/3206
Inventor 谭东杰马云宾周琰宋宁许斌王禹钦余东亮冯毅
Owner PIPECHINA SOUTH CHINA CO
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