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A low-dose compound natural gas hydrate inhibitor

A hydrate inhibitor and natural gas technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor environmental protection, high storage and transportation operation costs, and large amount of thermodynamic inhibitors, so as to improve performance and ecology Good safety and biocompatibility, high surface activity effect

Active Publication Date: 2018-08-21
王婷
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of large amount of thermodynamic inhibitors, high cost of storage and transportation and poor environmental protection in the prevention and control of natural gas hydrate in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] By weight, 30% C 12 Alkyl glycoside, 10% potassium formate, 59% ethylene glycol monobutyl ether aqueous solution (concentration 50%), 1% polyether defoamer was formulated as Hydrate Inhibitor A, which was added to 3.5% NaCl aqueous solution, The mass percentage concentration of the inhibitor in the solution was 1%. The samples to be tested were added into the autoclave for hydrate inhibition performance test. The test results are shown in Table 2.

Embodiment 2

[0021] By weight, 30% C 8 Alkyl glycosides, 10% potassium formate, 59% ethylene glycol monobutyl ether aqueous solution (concentration 50%), 1% polyether defoamer were formulated as Hydrate Inhibitor B, which was added to 3.5% NaCl aqueous solution, The mass percentage concentration of the inhibitor in the solution was 1%. The samples to be tested were added into the autoclave for hydrate inhibition performance test. The test results are shown in Table 2.

Embodiment 3

[0023] By weight, 30% C 12 Alkyl glycoside, 10% polyetheramine, 59% ethylene glycol monobutyl ether in water (concentration 50%), 1% polyether defoamer formulated as Hydrate Inhibitor C, which was added to 3.5% NaCl in water , so that the mass percentage concentration of the inhibitor in the solution is 1%. The samples to be tested were added into the autoclave for hydrate inhibition performance test. The test results are shown in Table 2.

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PUM

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Abstract

The invention relates to a low-dosage compounding type natural gas hydrate inhibitor. The low-dosage compounding type natural gas hydrate inhibitor mainly solves the problems of big dosage of thermodynamics inhibitor, high operation cost for storage and transportation and poor environment protection property in the process of preventing and controlling the natural gas hydrate. The inhibitor is prepared from, by weight percent, 5-40% of alkyl glycoside, 0-10% of synergist, 48-95% of solvent, and 0-2% of anti-foaming agent. The technical scheme can well solve the problems. The inhibitor is featured by low filling amount, good natural gas hydrate inhibiting performance, good economical property, environmental protection and others; the inhibitor can be applied to the prevention and control domain of the natural gas hydrate.

Description

technical field [0001] The invention relates to a low-dose compound natural gas hydrate inhibitor. Background technique [0002] Natural gas hydrate is an ice-like crystalline substance formed by natural gas and water under low temperature and high pressure conditions. . The formation of natural gas hydrates in natural gas extraction pipelines will cause pipeline blockage, reduce natural gas output, increase pipeline pressure difference, damage pipe fittings and equipment, cause serious pipeline accidents, and even cause gas wells to stop production. At present, the most effective and commonly used method to prevent natural gas hydrate embolism in pipelines in the natural gas industry is to inject chemical inhibitors, which can inhibit the formation of natural gas hydrates and also dissolve the formed natural gas hydrates. At present, domestic large gas fields mainly use methanol as a chemical inhibitor to prevent and control the formation of hydrates. Methanol, as a tradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524
CPCC09K8/524C09K2208/22C09K2208/32
Inventor 王婷
Owner 王婷
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