Pretension anti-buckling sleeve heat compensator and application thereof

Abstract

The invention discloses a pretension anti-buckling sleeve heat compensator and application thereof. The device comprises an outer sleeve, an outer sleeve pressing pipe, an inner pipe, a pressing bolt, a rolling bearing, a sealing rubber layer and the like. The device is provided with an axial limiting structure in the pipe to guarantee one-way movement of the inner pipe corresponding to the outer pipe; compared with a traditional sleeve compensator, the device reduces the damage risk of the pipes and sealing materials due to reciprocating motions caused by the temperature-pressure circulating effect; and meanwhile, the axial limiting structure enables the pretension generated by the pipes to counteract one part of pressure stress generated by the temperature-pressure combined effect to prevent overall buckling of the pipes, so that the buckling protection effect by the pretension due to embedding of pre-buckling pipes in the prior art is achieved, the problem of difficult embedding in deep sea in traditional pretension application is solved, meanwhile, the construction cost is saved, and the pipe working safety is guaranteed.

Description

technical field [0001] The invention relates to the field of anti-buckling methods and equipment for submarine pipelines, in particular to a pretension anti-buckling sleeve type thermal compensator and its application. Background technique [0002] The 21st century is the century of the ocean. At present, with the excessive growth of population and the intensified consumption of energy, offshore oil and gas resources, a new source of oil and gas exploitation, have become a key technology for the development of coastal countries in the world. In deep sea oil and gas projects, submarine pipelines are indispensable key equipment. The horizontal overall buckling of bare subsea pipelines under high temperature and pressure is one of the main forms of pipeline damage, and it is an important technical challenge for deep-sea oil and gas development. [0003] In response to this problem, a large number of scholars have carried out a series of related research on buckling protection...

AI Technical Summary

Problems solved by technology

Although the above compensation methods are technically mature, there are certain deficiencies and shortcomings. For example, the corrugated compensator is difficult to install and lags behind, and the compensation amount is not large, generally around 200-300mm; Cause damage to the sealing material, causing leakage

Another buckling protection method is to apply a certain degree of temperature and pressure to the bare pipeline after the pipeline is laid to make the pipeline produce pre-buckling within the elastic range, and then bury the pipeline at the position after buckling, so that The pre-tension stress is induced in the pipeline. After being put into use, the compressive stress generated by the pipeline under the combined action of temperature and pressure is partially offset by the pre-tension stress, so as to achieve the protection effect of the pipeline. This method is one of the most economical and feasible measures for buckling protection of submarine pipelines , its main disadvantage is that it is extremely difficult to embed pre-buckling pipelines with the development of oil development to the deep sea

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