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Kinetic natural gas hydrate inhibitor and preparation method thereof

A technology of kinetic inhibitors and hydrates, applied in chemical instruments and methods, drilling compositions, mechanical equipment, etc., can solve the problems of cost increase, sewage pollution, large dosage of thermodynamic inhibitors, etc., and achieve easy Recover and recycle, excellent use effect, excellent inhibitory effect

Inactive Publication Date: 2015-01-07
西南石油大学化学化工学院 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Hydrate thermodynamic inhibitors (soluble alcohols such as methanol, ethanol, ethylene glycol, inorganic salts, etc.) are often used in the actual generation of oil and gas industry, but the dosage of thermodynamic inhibitors is large, resulting in huge storage and injection equipment, increased production costs, and Produce a large amount of sewage to pollute the environment and increase the cost of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: A synthetic natural gas hydrate kinetics inhibitor, the inhibitor is labeled as H and consists of the following components in parts by weight: A: 70 parts of N-vinylpyrrolidone, B: 20 ​​parts of acrylamide, C : 10 parts of acrylonitrile, D: 100 parts of deionized water, E: 0.5 parts of mercaptothiol, F: 2.5 parts of 10% ammonium persulfate solution, G: 2.5 parts of 10% sodium sulfite.

[0014] The preparation method for preparing the above natural gas hydrate kinetic inhibitor comprises the following steps: (a) put A, B and D into a three-neck flask equipped with a reflux condensing device according to the ratio in claim 1, and then put Put the three-neck flask containing A, B and D into a magnetic water bath, heat to keep the temperature at 50~60°C, stir until A and B are completely dissolved in D, and set aside; (b) Add C to step (a) (c) Add E to the solution prepared in step (b), and stir for 2 to 3 minutes; then add solution G and solution F, at 50~60°...

Embodiment 2

[0015] Embodiment 2: A synthetic natural gas hydrate kinetics inhibitor, the inhibitor is labeled as H and consists of the following components in parts by weight: A: 80 parts of N-vinylpyrrolidone, B: 15 parts of acrylamide, C : 5 parts of acrylonitrile, D: 100 parts of deionized water, E: 0.5 parts of mercaptothiol, F: 2.5 parts of 10% ammonium persulfate solution, G: 2.5 parts of 10% sodium sulfite.

[0016] The preparation method of the above gas hydrate kinetic inhibitor is the same as that in Example 1.

Embodiment 3

[0017] Embodiment 3: A synthetic natural gas hydrate kinetics inhibitor, the inhibitor is labeled as H and consists of the following components in parts by weight: A: 80 parts of N-vinylpyrrolidone, B: 10 parts of acrylamide, C : 10 parts of acrylonitrile, D: 150 parts of deionized water, E: 1 part of mercaptothiol, F: 3 parts of 10% ammonium persulfate solution, G: 3 parts of 10% sodium sulfite.

[0018] The preparation method of the above gas hydrate kinetic inhibitor is the same as that in Example 1.

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PUM

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Abstract

The invention belongs to the technical field of preparing chemical reagents and in particular relates to a kinetic natural gas hydrate inhibitor and a preparation method thereof. The hydrate inhibitor is obtained by performing a free radical solution polymerization reaction on N-vinyl pyrrolidone (NVP), acrylamide (AM) and acrylonitrile (AN) which are used as synthesis monomers in the presence of ammonium persulfate and sodium sulfite which are used as initiators. The kinetic natural gas hydrate inhibitor is capable of reducing the hydrate generation temperature to a larger extent and prolonging the induction time and is suitable for the recovery and transportation of oil and gas fields; besides, the kinetic natural gas hydrate inhibitor is convenient to synthesize, low in cost, prone to biodegrade, and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemical reagents, in particular to a natural gas hydrate kinetic inhibitor and a preparation method. Background technique [0002] During natural gas exploitation, gathering, transportation and processing, due to changes in temperature, pressure, flow velocity, etc., natural gas hydrates are often formed at low temperature and high pressure turbulent flow, which is the main cause of abnormalities in natural gas production equipment and blockage of transmission pipelines, and even causes security incident. [0003] At present, the prevention and control of hydrate mainly adopts two kinds of physical methods and chemical methods. The physical method is mainly to make the oil and gas system not have the thermodynamic conditions for hydrate formation, including water removal method, heating method, depressurization method and the combined use of these methods. With the use of actual input an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524F17D1/02
CPCC09K8/524C09K2208/22F17D1/02
Inventor 马喜平柳海张锋谢京豫陈晓明黄保军曹洪贵贾剑平董江洁任定益王澄滨
Owner 西南石油大学化学化工学院
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