A pipe pig specially used for removing hydrate blockage in natural gas pipelines

A technology for natural gas pipelines and pipe pigs, which is applied in the field of pipe pigs and can solve problems such as blockage, blockage, and hydrate blockage
CN109772826BActive Publication Date: 2021-07-27CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2021-07-27

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Abstract

The invention belongs to the technical field of natural gas pipeline cleaning, and in particular relates to a pipe pig specially used for clearing natural gas pipeline hydrate blockage. This device can be used to remove hydrate blockages in natural gas pipelines, and has a self-blocking function. The pig is composed of two independent parts, which can be used separately or assembled. The pig includes a friction system, a quicklime heating gas system, a safety system, and a backup power unit. The chiseling function of the friction system can be used to clean the hydrate deposits that do not completely block the flow area and adhere to the pipe wall; the cutting function and continuous friction function of the friction system can be used in conjunction with the quicklime heating gas system to deal with the hydrate blockage section that completely blocks the flow area . The pipe pig of the present invention has the advantages of being direct, thorough, easy to operate, economical and the like in dealing with various problems of hydrate blockage in natural gas pipelines.
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Description

technical field

[0001] The invention belongs to the technical field of cleaning natural gas pipelines, and in particular relates to a pipe pig which can be used to clear hydrate blockages in natural gas pipelines and has the function of self-blocking removal. Background technique

[0002] Natural gas hydrate is a cage-shaped crystalline compound formed by water in natural gas and molecules such as methane, ethane, propane, isobutane, n-butane, nitrogen, carbon dioxide and hydrogen sulfide under certain pressure and temperature conditions. White crystals of loose ice or dense snow. Because natural gas hydrates can easily cause wellbore and gas pipeline blockage, it will greatly affect the normal production of gas fields. Relevant studies have shown that during the operation of the Sulige Gas Field, hydrate blockage has become the main factor that restricts production capacity in winter and leads to potential safety hazards.

[0003] At present, the method of injecting therm...

Claims

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