Method for controlling lateral displacement of submarine pipeline

Abstract

The invention belongs to the field of ocean engineering technology and particularly relates to a method for controlling lateral displacement of a submarine pipeline. An adopted control device comprises stress sensors, a power source, a control circuit, an annular rigid structure with a protrusion on the periphery, a protective layer, and an actuating mechanism capable of enabling the protective layer to be stripped off. Supports of the stress sensors are circular rings matched with the outer diameter of the pipeline, strain gauges of the stress sensors are distributed in the annular direction of the circular rings, the inner diameter of the annular rigid structure is larger than the outer diameter of the supports of the stress sensors, and the protective layer is arranged outside of the annular rigid structure. The control device is arranged outside the weak position of the submarine pipeline, and the control circuit controls the actuating mechanism to act according to whether strain signals collected by the stress sensors are too large, so that the protective layer is stripped off. By means of the method for controlling the lateral displacement of the submarine pipeline, the problem of too large lateral displacement in the overall buckling process of the submarine pipeline can be effectively solved, and the lateral buckling instability of the pipeline is controlled.

Description

Technical field [0001] The invention belongs to the field of overall buckling control of submarine pipelines, and relates to a lateral displacement control method in the overall buckling process of submarine pipelines. Background technique [0002] In recent years, with the development of offshore oil and gas resources, especially the exploitation of deep water and marginal oil fields, the working pressure of submarine pipelines has been continuously increased, and the design temperature generally reaches or exceeds 100°C, and may even reach a high temperature of 150°C. There are more submarine pipelines working under high temperature and high pressure. Due to the effect of thermal load and pressure load, when the operating temperature and pressure of the pipeline are higher than the surrounding environment, the pipeline will expand. If the axial deformation of the pipeline is limited by the surrounding soil, the pipeline will bear axial pressure. When the axial When the pr...

AI Technical Summary

Problems solved by technology

However, when the overall buckling of the pipeline occurs, it cannot control the excessive buckling deformation of the submarine pipeline

If the lateral displacement of the submarine pipeline is too large during the overall buckling process, it will lead to excessive stress in the pipeline, which will lead to local buckling or pipeline rupture of the submarine pipeline, which will cause pipeline leakage or make the pipeline unable to work normally

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