Temporary control system and method for floating buckling of land buried pipeline

Abstract

The invention discloses a temporary control system and method for floating buckling of a land buried pipeline. The system comprises a target control pipe section and an auxiliary control pipe section, wherein the target control pipe section is composed of a floating buckling section pipeline body, an upstream extension pipeline and a downstream extension pipeline; the auxiliary control pipe section is composed of an upstream far end auxiliary lifting section and a downstream far end auxiliary lifting section; and lifting points and strain rosettes are arranged on the target control pipe section and the auxiliary control pipe section, cushion layers are arranged at the suspension positions of the land buried pipeline, and covering layers are arranged at the exposed positions of the land buried pipeline. By adjusting the bending postures of a floating buckling section and upstream and downstream connecting sections of the floating buckling section and using an auxiliary bending pipe section to absorb the pipeline additional axial deformation quantity caused by excavation, so the purposes of uniform distribution and total control of stress are achieved, the stress and strain of pipelines everywhere are monitored, the safety of continuing service of the pipelines is guaranteed, and abundant analysis time and favorable construction conditions are created for follow-up study to develop a complete buckling control scheme. The system is clear in principle, quick in construction and good in motility.

Description

technical field [0001] The invention relates to a temporary control system and method for floating and buckling of buried pipelines on land. Background technique [0002] With the continuous development of onshore oil and gas fields, the number of production wells with high temperature and high pressure oil and gas production is increasing, which puts forward higher requirements for the strength and stability design of oil and gas gathering and transportation pipelines and accessories, and the guarantee of medium flow. Pipeline buoyancy buckling is a kind of overhead bending form formed by the release of thermal expansion displacement after the pipeline releases thermal expansion displacement after the partial upward force of the curved pipe section increases due to axial thermal expansion and extrusion, which is greater than the covering soil and the downward pressure of its own weight. The problem of pipeline stability destruction. Pipeline systems that pass the strength ...

AI Technical Summary

Problems solved by technology

However, there are few reports on the treatment ideas and methods after the pipeline buckling occurs, and there is no public statement on the temporary control measures, which is not conducive to the formation of a complete set of pipeline buckling prevention technology

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