A method and device for preventing pipe body thawing in permafrost regions by using a flexible limit belt device

Abstract

The invention relates to a method and a device for controlling thaw settlement of pipes in permafrost regions by flexible limit tapes. Two fixing plates (2) are symmetrically buried on two sides of a buried pipeline (1); four flexible tape (4) are fixed between the two opposing fixing plates (2) through screws (3); two flexible tapes (4) are diagonally stayed between the upper portion of the first fixing plate (2) and the second fixing plate (2); other two flexible tapes (4) are diagonally stayed between the upper portion of the second fixing plate (2) and the first fixing plate (2); the buried pipeline (1) is disposed in a crossing diamond grid of the flexible tapes (4); diamond grid intersections on two sides of the buried pipeline (1) are fixedly connected through bolts (6) and connecting plates (5); the flexible tapes (4) form a diamond limit area on the surface of the buried pipeline (1) to limit displacement range of the buried pipeline (1). The device has no moving parts, is free of maintenance, has good reliability, is free of power consumption and is applicable to buried pipelines in the permafrost regions.

Description

technical field [0001] The invention relates to a method and a device for preventing and controlling the thawing of a pipe body in a permafrost region by using a flexible limit band device. It relates to the technical field of piping systems. Background technique [0002] With the rapid development of my country's economy, the demand for oil and gas resources is also increasing. As an economical, safe, and uninterrupted long-distance oil and gas transportation tool, oil and gas pipelines have achieved tremendous development in recent decades. However, since many oil and gas resources are stored in permafrost regions, in order to meet the demand for oil and gas resources for economic development, more and more oil and gas pipelines will inevitably be built in permafrost regions. At present, the crude oil pipelines built in permafrost regions at home and abroad are representative of the Alaska pipeline in the United States, the Norman Wells pipeline in Canada and the Moda pi...

AI Technical Summary

Problems solved by technology

Second, after the permafrost thaws, the mechanical bearing capacity decreases sharply, or even loses the bearing capacity, making it impossible to effectively support the pipeline

Its shortcoming is that it not only consumes a lot of electric energy, does not take advantage of environmental protection and energy saving, but also has high operation and maintenance costs, which is economically unreasonable.

Also, the measure cannot be used in areas without a steady source of electricity

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