Device for lateral displacement control during integral buckling of submarine pipeline

A lateral displacement, submarine pipeline technology, applied in the direction of pipeline laying and maintenance, pipe/pipe joints/pipe fittings, mechanical equipment, etc. Spread, low cost, longevity effect

Inactive Publication Date: 2015-04-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can effectively solve the problem of excessive lateral displacement in the overall ...

Method used

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  • Device for lateral displacement control during integral buckling of submarine pipeline
  • Device for lateral displacement control during integral buckling of submarine pipeline
  • Device for lateral displacement control during integral buckling of submarine pipeline

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Experimental program
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Embodiment Construction

[0019] Attached below Figure 1-5 The present invention is described in detail with examples.

[0020] 1. The lateral displacement control device of the present invention mainly includes a stress sensor 2 , a microprocessor chip, a power supply, a relay, a sucker electromagnet 5 , and a protective layer structure 4 .

[0021] 2. The stress sensor 2 includes a strain gauge, a microprocessor chip, a relay and a power supply. The stress sensor 2 is made of high-precision resistance strain gauges, and the strain gauges are uniformly distributed on the outer surface of the pipe 1 to measure the strain of the pipe. The strain gauge converts the measured strain into a corresponding voltage signal, which is used as the input signal of the intermediate relay to control the closing and opening of the output circuit of the intermediate relay. The inner diameter of the stress sensor 2 is the same as the outer diameter of the pipeline 1. The strain gauges are arranged on the inner surfac...

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PUM

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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. More subsea 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 the axial pressure. When the pressure reaches a certain value, the overall buckling of the pipe will occur. Uplift buckling may occur for buried pipelines; later...

Claims

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Application Information

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IPC IPC(8): F16L1/16F16L1/20
CPCF16L1/16F16L1/20
Inventor 唐友刚王臻魁赵志娟张少洋冯浩
Owner TIANJIN UNIV
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