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Efficient composite hydrate inhibitor

A hydrate inhibitor and composite technology, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult agglomeration and agglomeration, unsatisfactory effect, etc., and achieves low cost and enhanced effect. , the effect of reducing the amount of production

Inactive Publication Date: 2007-11-21
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the anti-polymerization agent cannot prevent the formation of gas hydrate in the pipeline, it can make it difficult for the generated gas hydrate to coalesce into blocks
The anti-polymerization agent can work when the pipeline (or oil well) is closed or the ΔT is large, but its effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composite kinetic inhibitor selected consists of: the kinetic inhibitor is polyvinylpyrrolidone (PVP), and the mass percentage is 0.5% (referring to the mass percentage of water contained in the system, the same below), chlorination Sodium is 3% (referring to the mass percent of water contained in the system, hereinafter all the same); the experimental procedure is as above, and the results show that the induction time of the system hydrate containing 0.5% PVP is 84min, and the reaction completion time is 276min. The pressure drop is 0.8Mpa, and the induction time of the compound inhibitor system is 100min, the reaction completion time is 355min, the pressure drop of methane gas is 0.5Mpa, and the inhibition performance of PVP is obviously improved after adding 5% sodium chloride.

Embodiment 2

[0029] The composite kinetic inhibitor selected consists of: the kinetic inhibitor is polyvinylpyrrolidone (PVP), and the mass percentage composition is 0.5%, and sodium chloride is 5%; The induction time of the system hydrate is 84min, the reaction completion time is 276min, and the pressure drop of methane gas is 0.8Mpa, while the induction time of the system containing this composite inhibitor is 140min, the reaction completion time is 377min, and the pressure drop of methane gas is 0.4Mpa, the suppression effect is obviously improved.

Embodiment 3

[0031]The composite kinetic inhibitor selected consists of: the kinetic inhibitor is polyvinylpyrrolidone (PVP), and the mass percentage is 0.5%, and sodium chloride is 8%; The induction time of the system hydrate is 84min, the reaction completion time is 276min, the pressure drop of methane gas is 0.85Mpa, while the induction time of the system containing this composite inhibitor is 155min, the reaction completion time is 360min, the pressure drop of methane gas is 0.35Mpa, the suppression effect is obviously improved.

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Abstract

An efficient composite hydrate inhibitor is stable and economical. Salt or alcohol is added into dynamic inhibitor. It has less hydrate and longer generating time, wide applied range and no environmental pollution.

Description

Technical field: [0001] The invention relates to the technical field of hydrate inhibitors, in particular to an efficient composite hydrate inhibitor. Background technique: [0002] In natural gas and other petroleum fluids, when various low-boiling hydrocarbons such as methane, ethane, propane, carbon dioxide, hydrogen sulfide, etc., and water coexist, hydrates similar to ice crystals are easily formed at a certain temperature and pressure In severe cases, these hydrates can block wellbores, pipelines, valves and equipment, thereby affecting the normal operation of natural gas extraction, transportation and processing. Therefore, the prevention and treatment of natural gas hydrates has become the focus of its research. Various low-boiling hydrocarbons such as methane, ethane, propane, carbon dioxide, hydrogen sulfide, etc. exist in natural gas and other petroleum fluids, and can easily form a cage structure with water in petroleum and natural gas fluids at a certain tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52
Inventor 徐勇军
Owner DONGGUAN UNIV OF TECH
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