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Additive for improving shear-resistant property of oil-based crude oil drag reducing agent and using method

A drag reducer and anti-shear technology, which is applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of molecular chain breakage shear degradation, drag reducer loss of application performance, etc., to improve the application Performance, promotion of shear resistance, effect of improving shear resistance

Active Publication Date: 2016-03-23
SHENGLI COLLEGE CHINA UNIV OF PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Drag-reducing polymers are prone to molecular chain breakage and shear degradation during the application process, and this shear degradation property is permanent and irreversible, so the drag reducer loses its application performance

Method used

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  • Additive for improving shear-resistant property of oil-based crude oil drag reducing agent and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: a kind of additive that the present invention mentions is used to improve the anti-shear performance of oil-based crude oil drag reducer, and its preparation method is as follows:

[0019] Add 20g of distilled water into the beaker, weigh 20g of fatty alcohol polyoxyethylene ether (AEO-9) and slowly add it into the beaker, control the temperature at 25°C, stir at 100r / min for 20min, mix completely and set aside. Weigh 4g of dodecyltrimethylammonium bromide, slowly add it into the beaker, then weigh 0.4g of sodium salicylate, slowly add it into the beaker, control the temperature at 25°C, and stir at a rate of 120r / min for 60min; 20g of rapeseed oil, adjust the speed to 50r / min, control the temperature at 35°C and continue to stir for 20mins; then weigh 2g of polyalphaolefin drag-reducing polymer particles into the beaker, control the temperature at 5°C, rotate at 100r / min, and continue to stir for 10min. Then keep the temperature constant, increase the sti...

Embodiment 2

[0023] Embodiment 2: a kind of additive that the present invention mentions is used to improve the anti-shear performance of oil-based crude oil drag reducer, and its preparation method is as follows:

[0024] Add 20g of distilled water into the beaker, weigh 40g of fatty alcohol polyoxyethylene ether (AEO-9) and slowly add it into the beaker, control the temperature at 25°C, stir at 100r / min for 40min, mix and set aside. Weigh 2g of dodecyltrimethylammonium bromide, slowly add it into the beaker, then weigh 0.1g of sodium salicylate, slowly add it into the beaker, control the temperature at 35°C, stir at a rate of 50r / min for 120min; 20g soybean oil, adjust the rotation speed to 100r / min, control the temperature at 35°C and continue to stir for 20mins; then weigh 4g of drag-reducing polymer particles and add them to the beaker, control the temperature at 15°C, rotate at 100r / min, continue to stir for 60min, then keep the temperature constant Change, increase the stirring spee...

Embodiment 3

[0028] Embodiment 3: a kind of additive that is used to improve the anti-shear performance of oil-based crude oil drag reducer mentioned in the present invention, its preparation method is as follows:

[0029] Add 20g of distilled water into the beaker, weigh 20g of fatty alcohol polyoxyethylene ether (AEO-9) and slowly add it into the beaker, control the temperature at 30°C, stir at 100r / min for 40min, until the mixture is completely ready for use. Weigh 3g of dodecyltrimethylammonium bromide, slowly add it into the beaker, then weigh 0.2g of sodium salicylate, slowly add it into the beaker, control the temperature at 30°C, stir at a rate of 90r / min for 90min; 10g cottonseed oil, adjust the speed to 80r / min, control the temperature at 30°C and continue to stir for 20mins; then weigh 1.5g of drag-reducing polymer particles into the beaker, control the temperature at 10°C, turn at 100r / min, continue to stir for 15min, then maintain the temperature Without changing, increase the...

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Abstract

The invention relates to an additive for improving the shear-resistant property of an oil-based crude oil drag reducing agent and a using method. The method comprises the following manufacturing steps that 1, a non-ionic surface active agent is slowly added into distilled water to be stirred at a constant speed; 2, a cationic surface active agent and a charge control agent are continuously added into a beaker to be stirred at a constant speed; 3, vegetable oil is added into the solution prepared by the step 2, the temperature is controlled, and stirring is carried out; and 4, drag reducing polymer particles are added into the solution prepared by the step 3, the temperature is controlled, stirring is carried out at a constant speed at first, the temperature is kept to be 5 DEG C-15 DEG C, then the stirring speed is increased, stirring is continued, and finally emulsion, that is, the additive is formed. The additive has the beneficial effects that the rigidity of polymeric molecular chains is enhanced through reversible changes of micelles and winding effects of molecules, the shear-resistant property of the oil-based crude oil drag reducing agent is effectively improved, the application property of the drag reducing agent is improved, and the application cost of an injection agent is reduced.

Description

technical field [0001] The invention relates to a pipeline drag-reducing transport process and the technical field of a drag-reducing agent, in particular to an additive for improving the anti-shear performance of an oil-based crude oil drag-reducing agent and a use method thereof. Background technique [0002] The oil drag reducer can increase the output when no additional equipment is added after the original pipeline reaches the maximum output; or in the case of maintaining the same output, reduce the operating pressure of the oil pipeline, reduce safety risks, and add drag reducer Increasing the throughput or reducing the conveying pressure has become a kind of conveying process. The commonly used oil drag reducer is polyalphaolefin with a molecular weight of several million. It dissolves in crude oil and stretches its molecules. Through the elastic deformation of the molecular chain, it can reduce the frictional energy loss in the oil flow, reduce the flow resistance, a...

Claims

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Application Information

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IPC IPC(8): F17D1/16
CPCF17D1/16
Inventor 代晓东孔雪刘焕荣杨光辉李军王余宝
Owner SHENGLI COLLEGE CHINA UNIV OF PETROLEUM
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