Pipeline pig special for cleaning up blockage of hydrates in natural gas pipeline

A technology of natural gas pipelines and pigs, which is applied in the field of pigs, can solve problems such as hydrate blockage, jamming, and blockage, and achieve the effect of accelerating decomposition

Active Publication Date: 2019-05-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the existing pigs are mostly designed for oil pipelines, or for pigging under various environmental conditions. The simple cleaning method of peeling it off the pipe wall and pushing it forward is likely to cause more severe blockage of hydrates, not to mention that when the existing pipe pig faces a large volume and completely Weakness or even blockage when hydrates block the flow area

Method used

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  • Pipeline pig special for cleaning up blockage of hydrates in natural gas pipeline
  • Pipeline pig special for cleaning up blockage of hydrates in natural gas pipeline
  • Pipeline pig special for cleaning up blockage of hydrates in natural gas pipeline

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Embodiment Construction

[0030] The present invention will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the structures related to the present invention. The directions and references (for example, up, down, left, right, etc.) may only Used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalents.

[0031] Such as Figure 1 to Figure 4 Shown is a pig dedicated to removing hydrate blockage in natural gas pipelines.

[0032] 1. In terms of the internal structure of the pig body: the pig body includes a first cylinder. The first cylinder is provided with a first transmission rod 2 connected to one end of the first transmission rod 2 and the first...

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Abstract

The invention belongs to the technical field of natural gas pipeline cleaning, and particularly relates to a pipeline pig special for cleaning up the blockage of the hydrates in a natural gas pipeline. The pipeline pig can be used for cleaning up the hydrates in the natural gas pipeline and has the self-blocking-removing function. The pipeline pig is composed of two separate components which can be used separately or in an assembled mode and comprises a friction system, a raw lime heating gas system, a safety system, and a backup power unit, the chisel function of the friction system can be used for cleaning up the sedimentation of the hydrates that do not completely blocks the circulation area and are attached to the pipe wall, and the cutting function of the friction system can be combined with the continuous friction function of the raw lime heating gas system so as to be capable of dealing with the hydrate blocking segment that completely blocks the circulation area. The pipeline pig has the advantages of being direct, thorough, easy to operate and economic and the like in dealing with various problems of the hydrate blockage in the natural gas pipeline.

Description

Technical field [0001] The invention belongs to the technical field of natural gas pipeline cleaning, and specifically relates to a pig that can be used to remove hydrate blockage in a natural gas pipeline and has a self-blocking function. Background technique [0002] Natural gas hydrate is a clathrate 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 hydrate is easy to cause blockage of the wellbore and gas pipeline, it will greatly affect the normal production of the gas field. Relevant studies have shown that during the operation of the Sulige Gas Field, hydrate blockage has become a major factor restricting production capacity in winter and causing potential safety hazards. [0003] At present, the method of injecting thermodynamic inhibitors (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/055B08B13/00
Inventor 周诗岽何骋远秦天成张青宗胡倩张艺
Owner CHANGZHOU UNIV
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