A shale gas pipeline maintenance and nursing method

Abstract

The invention discloses a shale gas pipeline overhauling and maintaining method which comprises the step of checking and confirming a shale gas pipeline anti-leakage section to be maintained. The shale gas pipeline overhauling and maintaining method is characterized by further comprising the step of setting a leakage detection structure on the shale gas pipeline anti-leakage section so as to detect a leaking point and repair the leaking point in time after occurrence of leakage, wherein the leakage detection structure comprises a water expansion body layer which encircles the outer surface of a shale gas pipeline and is made of a water expansion material which can absorb water and expands outwards compulsively when encountering water; a damp-proof course is arranged outside the water expansion body layer; a leaking position can be judged by observing a swelling position on the surface of the damp-proof course after leakage happens. The shale gas pipeline overhauling and maintaining method has the advantages that the shale gas pipeline can be relatively well prevented from leakage, the pipeline leakage situation can be rapidly and accurately reflected after leakage happens, leakage can be conveniently and rapidly repaired, and the security can be improved.

Description

technical field [0001] The invention relates to the field of shale gas pipelines, in particular to a maintenance and nursing method for shale gas pipelines. Background technique [0002] Shale gas refers to the reserves in the shale formation Natural gas resources available for exploitation are a new type of clean energy. my country has abundant shale gas reserves and broad application prospects. [0003] In the transportation process after shale gas mining, various factors will cause the vibration of the pipeline due to the instability of air pressure during the mining process of shale gas, and the high pressure transportation is generally used in the transportation process. It mainly includes pipeline vibration caused by gas column natural frequency, mechanical natural frequency, gas flow pulsation and liquid hammer vibration, and the direction of the gas pipeline during vibration is uncertain. [0004] The existing shale gas pipeline installation is generally fixed dire...

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Problems solved by technology

[0004] The existing shale gas pipeline installation is generally fixed directly on the installation frame with a structure similar to a hoop device, which has poor shock absorption effect, and long-term use may easily cause the pipeline to leak due to long-term vibration and impact

Especially for some aging pipeline sections with long service life, if leakage occurs due to various reasons, it will not only cause waste of shale gas leakage, but also easily lead to explosion accidents

At the same time, when a shale gas pipeline leaks, it is difficult to quickly judge the location of the leak by naked eye observation. Therefore, how to better realize the detection and judgment of the leakage of the shale gas pipeline, so as to facilitate and quickly repair the leak to ensure safety, has become a problem. issues to consider

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