Internal-expansion type hydraulic boosting plugging device for submarine pipeline

Abstract

The invention discloses an internal-expansion type hydraulic boosting plugging device for a submarine pipeline. The internal-expansion type hydraulic boosting plugging device is cylindrical integrally, and comprises an internal-expansion type clamping pipe mechanism, a wedge-shaped boosting mechanism, a sealing mechanism and a traveling mechanism. The internal-expansion type hydraulic boosting plugging device for the submarine pipeline has the advantages that by the aid of an internal-expansion type fixing structure, a wedge-shaped boosting locking structure, an oil cylinder group linkage sealing structure and the like and by means of hydraulic control, the plugging device enters the pipeline from a retractable mechanism at the end of the pipeline, trepanning the pipeline is not required, and pipeline plugging operation can be achieved under the operating condition that pipeline oil gas is under pressure; the plugging device is high in plugging pressure, less damage to the pipeline, compact in structure, safe and reliable to operate and the like.

Description

technical field [0001] The invention belongs to the technical field of oil and gas pipeline transportation, and specifically refers to an internal expansion type submarine pipeline hydraulic booster plugging device. Background technique [0002] At present, in the exploitation of offshore oil and gas resources, submarine pipeline transportation is still the main transportation method, which has a series of advantages such as large transportation volume, short transportation cycle and high transportation efficiency. The submarine pipelines currently in service in my country have exceeded 5,000km, forming multiple subsea oil and gas regional transmission networks. However, with the complexity of the marine environment and the increase in the service life of submarine pipelines, damage to and even oil and gas leakage of submarine oil and gas pipelines occur from time to time. The damage and leakage of the pipeline will not only bring great economic losses to the enterprise, bu...

AI Technical Summary

Problems solved by technology

At present, the application of hot hole sealing technology in China has been relatively mature, but the hot hole sealing technology needs to open holes in the pipeline, which will cause great damage to the pipeline, and due to the complexity of the marine environment, this kind of plugging device Inconvenient when operating underwater

However, other plugging devices currently developed in China, such as local maintenance plugging fixtures, are only suitable for pipelines with lower pressure levels and safety requirements, and are not suitable for deep sea pipelines.

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