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Compound hydrate inhibitor

A hydrate inhibitor, a composite technology, which is applied to drilling compositions, pipeline systems, chemical instruments and methods, etc., can solve the problems of high cost, difficult recovery, high price, etc., and achieve good anti-aggregation effect and effect. Good effect, good inhibition effect

Inactive Publication Date: 2016-12-14
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of traditional inhibitors for preventing hydrate formation, such as large consumption, high cost, difficult recovery, high toxicity, high price, and difficult preparation, and to provide a new type of high-efficiency, economical and environmentally friendly composite hydrate Inhibitor

Method used

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Examples

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preparation example Construction

[0014] The preparation device adopted in the present invention comprises a visualized reactor and a low-temperature constant-temperature water bath. The reactor is composed of a hydrate forming section and a water storage section made of transparent glass, and the volume of each section is 40ml. The angle between the two sections is 110°, and a glass screen is installed in the middle. The initially injected solution is located in the hydrate formation section; when hydrate formation is performed, the water storage section is on the top, and the formation section is on the bottom, so that the generated hydrate is located in the formation section; when the decomposition experiment is performed, the water storage section of the formation section is located on the top , the water storage section is located below, and the water produced by hydrate decomposition can flow into the water storage section through the glass sieve under the action of gravity, while the agglomerated hydrat...

Embodiment 1

[0031] Take 20g of tetrahydrofuran, 80g of distilled water, 0.5% of sucrose and 0.06% of sodium pectate in distilled water; add sodium pectate into distilled water and heat to 40°C, stir at 1200 rpm for 20 to 25 minutes, then add Stir the sucrose for another 3 to 5 minutes to obtain the hydrate inhibitor; add tetrahydrofuran and the hydrate inhibitor into the reaction vessel; carry out the experiment according to the above-mentioned experimental procedure, and obtain the phase equilibrium temperature of the hydrate is 4.2°C, which is the same as that without the compound inhibitor The phase equilibrium temperature of the hydrate formed in the system is 0.2℃ lower than that.

Embodiment 2

[0033] Take 20g of tetrahydrofuran, 80g of distilled water, 39.4% of sucrose and 4.87% of sodium pectate in distilled water; add sodium pectate into distilled water and heat to 40°C, stir at 1200 rpm for 20 to 25 minutes, then add Stir the sucrose for another 3 to 10 minutes to obtain the hydrate inhibitor; add tetrahydrofuran and the hydrate inhibitor into the reaction vessel; carry out the experiment according to the above-mentioned experimental procedure, and obtain the phase equilibrium temperature of the hydrate is -2.5°C, which is comparable to that of the non-composite type The phase equilibrium temperature of the hydrate formed by the inhibitory system is 6.9℃ lower than that.

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Abstract

The invention relates to a compound hydrate inhibitor, and relates to the technical field of petrochemical industry. The compound hydrate inhibitor contains sucrose with mass concentration of 0.5 to 39.4% and sodium hyaluronate with mass concentration of 0.06 to 4.87%, and the balance of distilled water. The preparation method is as below: firstly, adding the pectin acid sodium to distilled water by proportion, heating to 40 DEG C, stirring at 1200 rpm / min for 20-25 min, fully mixing the pectic acid sodium and water, adding cane sugar, and stirring for 3-5 min to obtain the compound inhibitor solution. The compound inhibitor of the invention belongs to thermodynamic inhibitor, has good inhibition effect, and can reduce the phase equilibrium temperature of the hydrate to below 0 DEG C. The hydrate generated under the action of the inhibitor presents a state of uniform dispersed slurry, and has no accumulation phenomenon, so as to prove good aggregation prevention effect of the inhibitor.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a high-efficiency composite hydrate inhibitor. It is also suitable for inhibiting the formation of gas hydrates such as natural gas, carbon dioxide, and hydrogen. Background technique [0002] Under certain temperature and pressure, water and gas can form ice-like crystalline hydrates with a cage structure. In the process of oil and gas development, especially in the development of offshore oil and gas resources, the conditions of high water content and high pressure and low temperature of submarine pipelines are very suitable for the formation of hydrates, which will lead to blockage of pipeline hydrates and cause safety and production accidents. Bring many difficulties and economic losses to the exploitation and transportation of oil and natural gas. Research and development of suppression technology to prevent hydrate formation has important practical signific...

Claims

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Application Information

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IPC IPC(8): C09K8/524F17D1/17
CPCC09K8/524C09K2208/22F17D1/17
Inventor 王树立陈硕余冬梅饶永超吕晓方梁俊
Owner CHANGZHOU UNIV
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