Freeze soil area oil and gas pipeline surrounding temperature monitoring method
A technology for oil and gas pipelines and ambient temperature, applied in thermometers, thermometers with physical/chemical changes, measuring devices, etc., can solve the problems of undeveloped monitoring technology, complex formation mechanism of frost heaving and thawing disasters, and different permafrost characteristics And other issues
Active Publication Date: 2013-11-06
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
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[0052] 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.
[0053] The overall composition of the temperature monitoring system around oil and gas pipelines in permafrost regions is as follows: figure 2 shown; the principle block diagram is shown in Figure 5 shown. A temperature sensor group composed of fiber grating temperature sensors 3, 4, and 5 is installed on the surface of the oil and gas pipeline 2 in the permafrost area 1 and its surroundings. All the sensors are connected in series and then led to the monitoring station through the optical cable 12. The optical cable 12 and the optical switch 13 connection, the optical switch 13 is connected to the fiber grating demodulator 14, t...
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The invention discloses a freeze soil area oil and gas pipeline surrounding temperature monitoring method. The freeze soil area oil and gas pipeline surrounding temperature monitoring method includes the steps of monitoring the temperatures surrounding pipelines through temperature sensor sets, sending signals obtained through monitoring to a photoswitch (13) through optical cables (12), sending the signals to a lower computer (15) after the signals are demodulated by an interrogator (14), enabling the lower computer (15) to call self-programmed programs, control the photoswitch (13) and the interrogator (14), collect data and preprocess the data, transmitting the preprocessed data to a low-orbit satellite (17) through a satellite communication module (16), receiving the data through the low-orbit satellite (17) and forwarding the data to a satellite communication module (18), transmitting the received data to an upper computer (19) through the satellite communication module (18), analyzing and processing the data through the upper computer (19), and judging the safety condition of the pipelines to conduct damage forecasting. The freeze soil area oil and gas pipeline surrounding temperature monitoring method is high in precision, high in stability and low in cost.
Description
technical field [0001] The invention relates to a temperature monitoring method around 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 5.14 millio...
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Login to View More IPC IPC(8): G01K11/32G01K11/3206
Inventor 张世斌陈朋超马云宾李云超肖海峰赵文杰马涛杨爱兴
Owner PIPECHINA SOUTH CHINA CO