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.
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[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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