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Alkyl chitosan oligosaccharide polyether, preparation method thereof and drilling fluid

A technology of alkyl chitosan oligoside polyether and alkyl chitosan oligoside, applied in the field of drilling fluid, can solve the problem that the performance cannot meet the lubrication requirements well, achieve good inhibition and compatibility performance, reduce drilling cost, improve The effect of technological competitiveness

Active Publication Date: 2020-06-23
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At home and abroad, some work has been carried out on vegetable oil and animal oil lubricants. There are many types of products, but their performance cannot meet the lubrication requirements of long horizontal wells and other difficult wells.

Method used

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  • Alkyl chitosan oligosaccharide polyether, preparation method thereof and drilling fluid
  • Alkyl chitosan oligosaccharide polyether, preparation method thereof and drilling fluid
  • Alkyl chitosan oligosaccharide polyether, preparation method thereof and drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 54g of chitosan oligosaccharide, 120g of n-octanol, and 4g of hydrochloric acid into a four-necked flask equipped with a condensing reflux and stirring device, control the stirring speed at 900r / min, and react at a temperature of 110°C for 4 hours to obtain octyl chitosan Glycoside n-octanol solution, unreacted n-octanol is removed by distillation under reduced pressure to obtain octylchitooligoglucoside;

[0042] Add 90g of propylene oxide and 5g of sodium hydroxide to the above-mentioned octylchitooligoglucoside, and react at 90°C for 2 hours at a stirring speed of 900r / min to obtain a light yellow transparent viscous octylchitooligosaccharide Glycosides.

[0043] The product prepared in Example 1 of the present invention is detected by infrared spectrum, and the infrared spectrum is as follows: figure 1 As shown, the test result is: 3480cm -1 It is the stretching vibration peak of O-H bond, 2830~2950cm -1 It is the stretching vibration peak of the C-H bond in ...

Embodiment 2

[0048]Add 54g of chitosan oligosaccharide, 130g of n-decyl alcohol, and 5g of sulfuric acid into a four-necked flask with a condensing reflux and stirring device, control the stirring speed at 1000r / min, and react at a temperature of 120°C for 5 hours to obtain decyl chitosan Glycoside n-octanol solution, unreacted n-decyl alcohol was removed by distillation under reduced pressure to obtain decyl chitooligoglucoside;

[0049] Add 100g of butylene oxide and 7g of potassium hydroxide to the above-mentioned octylchitooligoglucoside, and react at 100°C for 3 hours at a stirring speed of 1000r / min to obtain a light yellow transparent viscous decyl shell Oligoglycosides.

[0050] The product prepared in Example 2 of the present invention is detected by infrared spectrum, and the infrared spectrum is as follows figure 2 As shown, the test result is: 3481cm -1 It is the stretching vibration peak of O-H bond, 2830~2950cm -1 It is the stretching vibration peak of the C-H bond in met...

Embodiment 3

[0056] Add 54g chitosan oligosaccharide, 140g n-dodecyl alcohol (n-dodecanol), 6g citric acid into the four-necked flask with condensing reflux and stirring device, control the stirring speed to be 1100r / min, at 130°C React at high temperature for 6 hours to obtain dodecyl chitooligoglucoside dodecyl alcohol solution, and remove unreacted dodecyl alcohol by distillation under reduced pressure to obtain dodecyl chitooligoglucoside;

[0057] Add 110g of pentane oxide and 8g of ammonia water to the above-mentioned dodecylchitooligoglucoside, and react at 110°C for 4 hours at a stirring speed of 1100r / min to obtain light yellow transparent viscous dodecane Chitooligoglycoside polyethers.

[0058] The product prepared in Example 3 of the present invention is detected by infrared spectrum, and the infrared spectrum is as follows: image 3 As shown, the test result is: 3482cm -1 It is the stretching vibration peak of O-H bond, 2830~2950cm -1 It is the stretching vibration peak of ...

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Abstract

The invention provides a preparation method of alkyl chitosan oligosaccharide polyether. The preparation method comprises the following steps: 1) reacting chitosan oligosaccharide with fatty alcohol under the action of an acidic catalyst to obtain alkyl chitosan oligosaccharide; and 2) reacting alkyl chitosan oligosaccharide with epoxide under the action of a basic catalyst to obtain alkyl chitosan oligosaccharide polyether. A long-chain alkyl group and a polyether group are introduced into the molecular structure of chitosan oligosaccharide, so that alkyl chitosan oligosaccharide polyether has a good lubricating property, is suitable for drilling construction of directional wells, highly-deviated wells, horizontal wells and the like, avoids underground complex problems such as supporting,pressing, jamming of a drill and the like, and realizes green, safe and efficient drilling. The invention also provides alkyl chitosan oligosaccharide polyether and a drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid treatment agents, and in particular relates to an alkyl chitosan polyether, a preparation method thereof and drilling fluid. Background technique [0002] In recent years, with more and more difficult wells such as deep wells, ultra-deep wells, horizontal wells with long horizontal sections, and extended-reach wells, the requirements for the lubrication and anti-seizing of drilling fluids are getting higher and higher. Generally, mixing crude oil, diesel oil, white oil and other mineral oils into the drilling fluid can better meet the needs of downhole lubrication and anti-seize, but with the increasingly stringent environmental protection requirements, the application of mineral oil lubricants is limited. Therefore, research and development of green and environmentally friendly high-performance lubricants has become a major development trend. [0003] At home and abroad, some work has bee...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/20C07H15/08C07H1/00C08B37/08C08G65/28
CPCC09K8/035C09K8/20C07H15/08C07H1/00C08B37/003C08G65/2621C09K2208/34
Inventor 司西强王中华李伟廷魏军王忠瑾赵虎
Owner 中石化石油工程技术服务有限公司
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