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A kind of polyhydroxy organic amine water-based drilling fluid shale inhibitor and preparation method thereof

A shale inhibitor and water-based drilling fluid technology, which is applied in the preparation of organic compounds, the preparation of aminohydroxy compounds, and organic chemistry, etc., can solve the problems of large odor and insignificant effect, and achieves simple operation and good inhibition effect. , the effect of mild reaction conditions

Inactive Publication Date: 2016-10-05
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional amine inhibitors include tetramethylammonium chloride, dimethyldiallyl ammonium chloride, 2-hydroxyethyltrimethylammonium chloride, methyltrihydroxyethylammonium chloride, etc., but they all have odor Problems that are large, easy to degrade, and have no obvious effect

Method used

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  • A kind of polyhydroxy organic amine water-based drilling fluid shale inhibitor and preparation method thereof
  • A kind of polyhydroxy organic amine water-based drilling fluid shale inhibitor and preparation method thereof
  • A kind of polyhydroxy organic amine water-based drilling fluid shale inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 0.2 mol of triethanolamine and add 145 ml of absolute ethanol to dissolve in a three-neck flask, pass nitrogen for 10 minutes and then raise the temperature to 55°C, add 0.1 mol of dibromoethane dropwise and reflux for 22 hours. After the reaction, the crude product of the obtained inhibitor was recrystallized using ethyl acetate and absolute ethanol, the volume ratio of ethyl acetate and absolute ethanol was 1.5:8, and the recrystallized product was heated at a temperature of 40 to 50°C After vacuum drying, the refined polyhydroxy organic amine water-based drilling fluid shale inhibitor was obtained, and its melting point was measured to be 47°C.

Embodiment 3

[0036] Take 0.2 mol of triethanolamine and add 160 ml of absolute ethanol to dissolve in a three-neck flask, pass nitrogen for 10 minutes and then raise the temperature to 65°C, add 0.25 mol of dibromoethane dropwise and reflux for 26 hours. After the reaction, the crude product of the obtained inhibitor was recrystallized using ethyl acetate and absolute ethanol, the volume ratio of ethyl acetate and absolute ethanol was 2:8, and the recrystallized product was vacuum-dried at a temperature of 50°C , that is, the refined polyhydroxy organic amine water-based drilling fluid shale inhibitor was measured and its melting point was 46.8°C.

[0037] Example 3:

[0038] Take 0.2 mol of triethanolamine and add 180 ml of absolute ethanol to dissolve in a three-necked flask, pass nitrogen for 10 minutes and then raise the temperature to 57°C, add 0.14 mol of dibromoethane dropwise and reflux for 24 hours. After the reaction, the crude product of the obtained inhibitor was recrystallize...

Embodiment 4

[0040] Take 0.2 mol of triethanolamine and add 190 ml of absolute ethanol to dissolve in a three-necked flask, pass nitrogen for 10 minutes and then raise the temperature to 60°C, add 0.2 mol of dibromoethane dropwise and reflux for 23 hours. After the reaction, the crude product of the obtained inhibitor was recrystallized using ethyl acetate and absolute ethanol, the volume ratio of ethyl acetate and absolute ethanol was 1.6:8.1, and the recrystallized product was vacuum-dried at 45°C , that is, the refined polyhydroxy organic amine water-based drilling fluid shale inhibitor was measured and its melting point was 46.5°C.

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Abstract

The invention discloses a multi-hydroxyl organic amine water-based drilling fluid shale inhibitor and a preparation method thereof. The multi-hydroxyl organic amine water-based drilling fluid shale inhibitor is N<1>,N<1>,N<1>,N<2>,N<2>,N<2>-hexa(2-hydroxyethyl) ethylenediamine ammonium bromide and is prepared by using triethanolamine and dibromoethane as raw materials and using ethyl alcohol as a solvent through reaction under the heating condition. The inhibitor contains quaternary ammonium salt ions and a large number of hydroxide radicals, has the functions of adsorbing clay particles and effectively preventing shale hydration and dispersing, has better thermal stability performance, especially has better inhabiting effect in fresh water base slurry, is soluble in water and can be directly used in a water-based drilling fluid. The preparation method of the inhibitor is completed through one step, is simple in operation, convenient to prepare and easy to control and can be used for industrial production, the raw materials are cheap and easy to obtain, and reaction conditions are moderate.

Description

technical field [0001] The invention relates to a water-based drilling fluid shale inhibitor and a preparation method thereof, in particular to a cationic polyhydroxy organic amine water-based drilling fluid shale inhibitor and a preparation method thereof. Background technique [0002] Wellbore instability caused by shale hydration dispersion is a worldwide technical problem encountered in drilling engineering. When drilling in shale formations, oil-based drilling fluids and synthetic-based drilling fluids with strong inhibition are usually used. Due to environmental protection pressure and cost issues, although the "drilling fluid does not land" process for the treatment of waste drilling fluid is in the research and development stage, the use of the two is still subject to certain restrictions. Therefore, the development of low-cost, environmentally acceptable shale inhibitors and high-performance water-based drilling fluid systems has important research significance and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/22C07C215/14C07C213/08C07C213/00
CPCC07C213/00C07C213/08C07C215/14C09K8/22C09K2208/12
Inventor 蒲晓林都伟超孙金声罗霄
Owner SOUTHWEST PETROLEUM UNIV
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