Freeze soil area oil and gas pipeline monitoring method

A technology for oil and gas pipelines and permafrost areas, which is applied in the direction of measuring force, measuring devices, and measuring heat, and can solve the problems of complex formation mechanism of frost heaving and thawing disasters, different characteristics of permafrost, and no mature monitoring technology.

Active Publication Date: 2013-11-06
PIPECHINA SOUTH CHINA CO
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  • Abstract
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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 disast...

Method used

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

Examples

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Embodiment

[0091] Example. This example is a test method, and the test was carried out in a frozen soil area with a seasonal frozen soil thickness of 2 m and a frozen soil type of ice-rich and saturated ice, where the pipeline was buried in a depth of 2 m, the diameter of the pipe body was 813 mm, and the wall thickness was 813 mm. 10mm, steel grade X65.

[0092] The overall composition of the oil and gas pipeline monitoring system in permafrost areas is as follows: figure 2 shown; the schematic diagram is shown in Figure 7 shown. A temperature sensor group composed of fiber grating temperature sensors 3, 4, and 5 is installed on the surface of and around the oil and gas pipeline 2 in the frozen soil area 1, and a temperature sensor group composed of fiber grating water content sensors 6, 7, 8, and 9 is installed around the oil and gas pipeline 2. In the water sensor group, on the side of the oil and gas pipeline 2, the fiber grating displacement sensors 10 and 11 are installed. All ...

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Abstract

The invention discloses a freeze soil area oil and gas pipeline monitoring method. The freeze soil area oil and gas pipeline monitoring method includes the steps of conducting monitoring on the temperatures and the moisture around pipelines and the displacement of a tube bodies through temperature sensor sets, moisture sensor sets and fiber bragg grating displacement sensor sets respectively, 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 monitoring method is high in precision, high in stability and low in cost.

Description

technical field [0001] The invention relates to a method for monitoring 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 not including measurement, general control system and pipeline system. 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 frozen soil. According to the length of the frozen state of the soil, frozen soil can generally be divided into short-term frozen soil (several 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. The frozen soil area is about 5.14 million square kilometers, accounting for ab...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01K11/32G01N21/00G01L1/00G01K11/3206
Inventor 陈朋超马云宾赵迎波蔡永军李增彬马涛吴官生杨士梅
Owner PIPECHINA SOUTH CHINA CO
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