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Hydrophobic group and hydroxypropyl group-contained guar gum

A technology of hydroxypropyl guar gum and hydroxypropyl, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex preparation of fracturing fluid, increased cost of fracturing construction, single performance, etc., to achieve Strong temperature resistance, enhanced temperature resistance, and reduced dosage

Inactive Publication Date: 2012-01-25
西安长庆化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the thickeners used in fracturing in oil fields mainly include three types: hydroxypropyl guar gum, carboxymethyl hydroxypropyl guar gum, and carboxymethyl hydroxypropyl guar gum. The formed fracturing fluid system requires various additives such as clay stabilizers, drainage aids, and preservatives. The fracturing fluid preparation is complicated, which increases the cost of fracturing construction to a certain extent.

Method used

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  • Hydrophobic group and hydroxypropyl group-contained guar gum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The chemical reaction weight ratio is:

[0034] 100 pieces of guanidine gel

[0035] Sodium hydroxide 5 parts

[0036] Propylene oxide 10 parts

[0037] Hexadecyldimethyl tertiary amine 4 parts

[0038] 2 parts hydrochloric acid

[0039] 50 parts of water

[0040] 110 parts of methanol;

[0041] (2) The chemical reaction process steps are:

[0042] According to the above chemical reaction ratio, pre-cool the kneader, spray the methanol solution of alkali through the nozzle on the guar rubber sheet constantly stirred by the kneader within 5 minutes, control the alkalization temperature at 18°C, and alkalization time for 30 minutes After the alkalization reaction is completed, add propylene oxide dropwise under vacuum and react at 18°C ​​for 50 minutes; then spray cetyl dimethyl tertiary amine / methanol solution evenly through the nozzle in the kneader, The reaction was carried out at low temperature for 60 minutes; finally, the temperature was uniformly and rap...

Embodiment 2

[0044] (1) The chemical reaction weight ratio is:

[0045] 100 pieces of guanidine gel

[0046] Sodium hydroxide 10 parts

[0047] Propylene oxide 12.5 parts

[0048] Hexadecyldimethyl tertiary amine 8 parts

[0049] 3.5 parts of hydrochloric acid

[0050] 80 parts of water

[0051] 145 parts of methanol;

[0052] (2) The chemical reaction process steps are:

[0053] According to the above chemical reaction ratio, pre-cool the kneader, spray the methanol solution of alkali through the nozzle on the guar rubber sheet constantly stirred by the kneader within 5 minutes, control the alkalization temperature at 18°C, and alkalization time for 30 minutes , After the alkalization reaction is completed, add propylene oxide dropwise under vacuum and react at 18°C ​​for 50 minutes; then spray cetyldimethyl tertiary amine / methanol solution evenly through the nozzle in the kneader, The reaction was carried out at low temperature for 60 minutes; finally, the temperature was uniforml...

Embodiment 3

[0055] (1) The chemical reaction weight ratio is:

[0056] 100 pieces of guanidine gel

[0057] Potassium hydroxide 15 parts

[0058] Propylene oxide 15 parts

[0059] Hexadecyldimethyl tertiary amine 12 parts

[0060] 5 parts hydrochloric acid

[0061] 110 parts of water

[0062] 180 parts of methanol;

[0063] (2) The chemical reaction process steps are:

[0064] According to the above chemical reaction ratio, pre-cool the kneader, spray the methanol solution of alkali through the nozzle on the guar rubber sheet constantly stirred by the kneader within 5 minutes, control the alkalization temperature at 18°C, and alkalization time for 30 minutes After the alkalization reaction is completed, add propylene oxide dropwise under vacuum and react at 18°C ​​for 50 minutes; then spray cetyl dimethyl tertiary amine / methanol solution evenly through the nozzle in the kneader, The reaction was carried out at low temperature for 60 minutes; finally, the temperature was uniformly and...

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Abstract

The invention relates to a method for preparing a hydrophobic group and hydroxypropyl group-contained guar gum. At present, the viscosifying agents used for compression fracture on an oilfield are mainly the three varieties, namely hydroxypropyl guar gum, carboxymethyl guar gum and carboxymethyl hydroxypropyl guar gum, the three viscosifying agents have single performance, fracturing fluid systems respectively formed by the three viscosifying agents all require stabilizing agents, cleanup additives, corrosion inhibitors and other varieties of adjuvants, the preparation of fracturing fluids is complicated, and the cost of fracturing construction is increased to a certain extent. According to the method provided by the invention, by taking guar gum pieces as a starting raw material and adopting a kneading method, the hydrophobic group and hydroxypropyl group-contained guar gum is synthesized through etherification and chain scission and grafting, and has the function of a surface active agent, the use amount of the surface active agent is reduced during the usage, the cost is reduced, at the same time, the temperature resistance of the guar gum is stronger than that of the single hydroxypropyl guar gum, and the temperature resistance of a deep well is strengthened.

Description

technical field [0001] The invention relates to a preparation method for producing guar gum containing hydrophobic groups and hydroxypropyl groups by using guar gum sheets as raw materials through a kneading method. technical background [0002] At present, the thickeners used in fracturing in oil fields mainly include three types: hydroxypropyl guar gum, carboxymethyl hydroxypropyl guar gum, and carboxymethyl hydroxypropyl guar gum. The formed fracturing fluid system requires various additives such as clay stabilizers, drainage aids, and preservatives. The preparation of fracturing fluids is complicated, which increases the cost of fracturing construction to a certain extent. Contents of the invention [0003] The technical problem solved by the present invention is to provide a kind of preparation method that takes guar sheet as raw material to produce a kind of guar gum polymer containing hydrophobic group and hydroxypropyl group by kneading method, the thickener that ...

Claims

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Application Information

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IPC IPC(8): C08B37/00C09K8/62
Inventor 杜彪谢璇杨海燕万华杨继刚赵燕红程芳吕俊华叶智窦淼李鹏王伟波金龙安恒文姬文亮李强
Owner 西安长庆化工集团有限公司
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