Wax deposition resistant coating for oil pipeline

An oil pipeline, anti-waxing technology, applied in epoxy resin coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as inability to apply, and achieve high anti-waxing efficiency, obvious effect, and high bond strength. Effect

Inactive Publication Date: 2006-11-22
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is not suitable for oil pipeline conditions and cannot be applied in oil pipelines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 50Kg of polyurethane prepolymer and 25Kg of xylene into the reaction kettle, raise the temperature to 65°C, slowly add 15Kg of hydroxyl-terminated polydimethylsiloxane, the feeding time is controlled at about 30min, after the addition, quickly add 1Kg dropwise Dibutyltin dilaurate and 1Kg of azobisisobutyronitrile were incubated for 4 hours and then cooled to 20°C to obtain a light yellow modified polyurethane product.

Embodiment 2

[0029] Take 50Kg of polyurethane prepolymer and 25Kg of acetone into the reaction kettle, raise the temperature to 65°C, slowly add 15Kg of hydroxyl-terminated polydimethylsiloxane, and control the feeding time at about 30 minutes. After the addition, quickly add 1Kg of mono Butyltin trichloride and 1Kg triethylamine were incubated for 4 hours and then cooled to 20°C to obtain a light yellow modified polyurethane product.

Embodiment 3

[0031] Put 30Kg of modified polyurethane into the reaction kettle, add 20Kg of xylene and 10Kg of acetone, raise the temperature to 60°C, and add 20Kg of polyvinylidene fluoride, 10Kg of epoxy resin, 3Kg of molybdenum disulfide and 5Kg of cerium fluoride was stirred for 3 hours, cooled to room temperature, and 1Kg of leveling agent and 1Kg of defoamer were added to obtain 100Kg of anti-wax coating.

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PUM

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Abstract

Disclosed is an anti-waxing paint for internal surfaces of oil pipes, which comprises modified polyurethane 20-50%, polyvinylidene fluoride 5-30%, epoxy resin 5-20%, molybdenum sulfide 2-20%, Disclosed is an anti-waxing paint for internal surfaces of oil pipes, which comprises modified polyurethane 20-50%, polyvinylidene fluoride 5-30%, epoxy resin 5-20%, molybdenum sulfide 2-20%, cerium fluoride 2-10%.

Description

technical field [0001] The invention relates to an anti-wax coating, which is mainly used for the anti-wax coating treatment on the inner surface of oil pipelines during crude oil exploitation and pipeline gathering and transportation. Background technique [0002] Most of the crude oil produced in my country is highly viscous, easy to condense, and high in wax content. Generally, the wax content is 15% to 25%, and some even reach more than 40%. For high waxy crude oil, due to changes in temperature, pressure and other conditions during oil extraction, storage and transportation, waxes and colloids will be precipitated from the crude oil in large quantities and deposited on the surface of sucker rods of downhole devices, oil pipelines and storage On the inner wall of the oil container, the phenomenon of wax deposition is serious. In terms of crude oil extraction, the oil output capacity of the oil well will be reduced, and the life of the pumping unit will be reduced; in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D127/16C09D163/00F16L58/10
Inventor 张学俊胡拖平杨云峰张蓉李巧玲吴晓青
Owner ZHONGBEI UNIV
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