Device for lateral displacement control during global buckling of submarine pipelines

Abstract

The invention belongs to the technical field of ocean engineering and relates to a device for lateral displacement control during integral buckling of a submarine pipeline. The device comprises a strain sensor, a power source, a control circuit, an annular rigid structure with peripheral projections, a protecting layer and an actuating mechanism capable of enabling the protecting layer to be stripped off. A support of the strain sensor is a ring matched with the external diameter of the pipeline, strain foils of the strain sensor are distributed circumferentially uniformly along the ring, the internal diameter of the annular rigid structure is larger than the external diameter of the support of the strain sensor, the protecting layer is arranged on the outer portion of the annular rigid structure and used for protecting the annular rigid structure to enable the annular rigid structure not to contact with a seabed, and the control circuit is used for controlling whether or not the actuating mechanism actuates and the protecting layer needs to be stripped off according to strain signal values collected by the strain sensor. The device is capable of solving the problem of overlarge lateral displacement during integral buckling of the submarine pipeline effectively and controlling lateral buckling instability of the pipeline.

Description

Technical field [0001] The invention belongs to the field of overall buckling control of submarine pipelines, and is a device for controlling lateral displacement during 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 th...

AI Technical Summary

Problems solved by technology

The invention can effectively solve the problem of excessive lateral displacement in the overall buckling process of the submarine pipeline, and control the lateral buckling instability of the pipeline

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