Cellulose ether for drilling fluid and preparation method thereof

A technology of cellulose ether and drilling fluid, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor salt tolerance, poor effect of water loss reduction, etc., achieve optimal water loss reduction, and improve coalescence stability The effect of improving the hydration and dispersing ability

Inactive Publication Date: 2020-11-03
董群雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when cellulose ether is used in drilling fluid, the effect of reducing water loss and salt resistance are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] Add 130mL of epichlorohydrin into the three-necked flask, place the three-necked flask in an ice-water bath, pass trimethylamine gas into the three-necked flask, start the stirrer, stir at a speed of 200r / min, ventilate and react for 4h, and obtain the reaction product. The reaction product is filtered and separated to obtain a filter residue, which is put into an oven and dried to obtain a cationic etherification agent; add 25 g of hydroxyethyl cellulose, 145 mL of 12% sodium hydroxide solution and 8 g of a cationic etherification agent to the reaction kettle. agent, start the agitator, stir the reaction for 1h to obtain the reaction mixture, neutralize the reaction mixture with hydrochloric acid to obtain a suspension, place the suspension in a high-speed centrifuge and centrifuge at a speed of 2000r / min for 8min, remove the supernatant, and collect For the lower layer of sediment, put the precipitate in an oven with a set temperature of 60°C and dry for 4 hours to obt...

example 2

[0042] Add 135mL epichlorohydrin into the three-necked flask, place the three-necked flask in an ice-water bath, pass trimethylamine gas into the three-necked flask, start the stirrer, stir at a speed of 230r / min, ventilate and react for 4h, and obtain the reaction product. The reaction product was filtered and separated to obtain a filter residue, which was put into an oven and dried to obtain a cationic etherification agent; 32 g of hydroxyethyl cellulose, 148 mL of 12% sodium hydroxide solution and 9 g of a cationic etherification agent were added to the reaction kettle. agent, start the agitator, stir the reaction for 2 hours to obtain a reaction mixture, neutralize the reaction mixture with hydrochloric acid to obtain a suspension, place the suspension in a high-speed centrifuge and centrifuge at a speed of 2500r / min for 9 minutes, remove the supernatant, and collect For the lower layer of sediment, put the precipitate in an oven with a set temperature of 65°C and dry for ...

example 3

[0044] Add 140mL epichlorohydrin into the three-necked flask, place the three-necked flask in an ice-water bath, pass trimethylamine gas into the three-necked flask, start the stirrer, stir at a speed of 250r / min, ventilate and react for 5h, and obtain the reaction product. The reaction product is filtered and separated to obtain a filter residue, which is put into an oven and dried to obtain a cationic etherification agent; add 38 g of hydroxyethyl cellulose, 150 mL of 12% sodium hydroxide solution and 10 g of a cationic etherification agent to the reaction kettle. agent, start the agitator, stir and react for 2 hours to obtain a reaction mixture, neutralize the reaction mixture with hydrochloric acid to obtain a suspension, place the suspension in a high-speed centrifuge and centrifuge at a speed of 3000r / min for 10min, remove the supernatant, and collect For the lower layer of sediment, put the precipitate in an oven with a set temperature of 70°C and dry for 5 hours to obta...

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Abstract

The invention relates to cellulose ether for drilling fluid and a preparation method thereof, and belongs to the technical field of petroleum additive preparation. The preparation method comprises thefollowing steps: introducing trimethylamine gas into epoxy chloropropane at low temperature, stirring to react to obtain a reaction product, filtering and drying to obtain a cationic etherifying agent, etherifying hydroxyethyl cellulose by using the cationic etherifying agent under an alkaline condition, carrying out centrifugal separation and drying to obtain cationic hydroxyethyl cellulose, mixing dimethylallylamine, chloroacetic acid and a sodium hydroxide solution, stirring for reaction to obtain light yellow liquid, distilling and filtering to obtain light yellow mucus, introducing chlorine into the light yellow mucus, heating for distillation, adding absolute ethyl alcohol, filtering to obtain viscous filtrate, stirring the viscous filtrate and cationic hydroxyethyl cellulose for reaction to obtain cationic hydroxyethyl cellulose, obtaining a solid crude product, soaking the solid crude product in a methanol solution of acetic acid, filtering, and drying to obtain the amphotericcellulose ether for the drilling fluid, so that the amphoteric cellulose ether has a wide application prospect.

Description

technical field [0001] The invention relates to a cellulose ether for drilling fluid and a preparation method thereof, belonging to the technical field of petroleum additive preparation. Background technique [0002] Currently, cellulose ether is a polymer compound with an ether structure made from cellulose. Each glucosyl ring in the cellulose macromolecule contains three hydroxyl groups, the primary hydroxyl group on the sixth carbon atom, the secondary hydroxyl group on the second and third carbon atoms, and the hydrogen in the hydroxyl group is replaced by a hydrocarbon group to generate cellulose ether derivatives things. It is a product in which the hydrogen of the hydroxyl group in the cellulose polymer is replaced by a hydrocarbon group. Cellulose is a polyhydroxy polymer compound that neither dissolves nor melts. After etherification, cellulose is soluble in water, dilute alkali solution and organic solvent, and has thermoplasticity. [0003] According to the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/20C09K8/035C09K8/24
CPCC08B11/20C09K8/035C09K8/24
Inventor 董群雄林来斌黄晨
Owner 董群雄
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