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Anti-corrosion anti-wax anti-fouling coating and preparation method thereof

An anti-fouling coating and anti-wax technology, which can be used in anti-corrosion coatings, coatings, fire-retardant coatings, etc., can solve the problems of low cost and less coating, and achieve the effects of reducing costs, excellent wear resistance and good application prospects.

Pending Publication Date: 2019-10-01
QINGYANG ZHOUYANG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-wax coating requires good anti-wax rate, anti-corrosion performance and anti-scaling performance, and can withstand high temperature and high pressure at the bottom of the well. At the same time, it also needs low cost. There are very few coatings that can meet multiple technical conditions.

Method used

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  • Anti-corrosion anti-wax anti-fouling coating and preparation method thereof

Examples

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preparation example Construction

[0026] Wherein, the preparation method of metronidazole-modified graphene oxide composite material comprises the steps: flake graphite and concentrated sulfuric acid are mixed, and after ultrasonic dispersion, stir reaction in ice bath for 20-25min; Then add sodium nitrate to continue reaction 20-25min, then Add potassium permanganate to react for 100-110min; stir the obtained mixture in an oil bath at 39°C and continue to react for 2-3h, then add water, raise the reaction temperature to 95°C, react for 1-2h and then add the mass concentration of 10%-12% hydrogen peroxide solution, reacted for 40-50min, then washed with hydrochloric acid with a molar concentration of 0.35-0.45mol / L, then centrifuged, dried, and ground in sequence to obtain graphene oxide; flake graphite and concentrated sulfuric acid The weight ratio of sodium nitrate, potassium permanganate and hydrogen peroxide solution is 1: (40-50): (1.2-1.5): (4-8): (50-60); the dissolved maleic anhydride Add graphene oxi...

Embodiment 1

[0035] This embodiment provides an anti-corrosion, anti-wax, and anti-fouling coating, which includes an inner layer and an outer layer with a thickness ratio of 1:3.2.

[0036] The raw material components of the inner layer are calculated in parts by weight, including: 10 parts by weight of polytetrafluoroethylene resin, 7 parts by weight of the first filler, 8 parts by weight of boron phenolic resin, 4 parts by weight of methyl methacrylate, and 50 parts by weight of the first solvent Parts, 7 parts by weight of the first curing agent.

[0037] Wherein, the first filler is a mixture of nano-silica, nano-titanium dioxide and polytetrafluoroethylene micropowder with a mass ratio of 1:3:2; the particle diameter of the first filler is 80-100nm; the first solvent is a mass ratio of 1:0.5:1.8 mixture of xylene, butyl acetate and N-methylpyrrolidone; the first curing agent is cashew nut shell liquid modified phenalkamine.

[0038] The raw material components of the outer layer are...

Embodiment 2

[0047] This embodiment provides an anti-corrosion, anti-wax, and anti-fouling coating, which includes an inner layer and an outer layer with a thickness ratio of 1:3.6.

[0048] The raw material components of the inner layer include: 16 parts by weight of polytetrafluoroethylene resin, 5 parts by weight of the first filler, 12 parts by weight of boron phenolic resin, 3 parts by weight of methyl methacrylate, 56 parts by weight of the first solvent part, 4 parts by weight of the first curing agent.

[0049] Wherein, the first filler is a mixture of nano-silica, nano-titanium dioxide and polytetrafluoroethylene micropowder with a mass ratio of 3:5:0.3; the particle size of the first filler is 80-100nm; the first solvent is 1:5 : 4 mixtures of xylene, butyl acetate and N-methylpyrrolidone; the first curing agent is cashew nut shell oil modified phenalkamine.

[0050] The raw material components of the outer layer are calculated in parts by weight, including: 20 parts by weight o...

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Abstract

The invention relates to an anti-corrosion anti-wax anti-fouling coating and a preparation method thereof. The coating comprises an inner layer and an outer layer; the inner layer is prepared from, byweight, 10-16 parts of polytetrafluoroethylene resin, 5-7 parts of a first filler, 8-12 parts of boron phenolic resin, 3-4 parts of the methyl methacrylate, 50-56 parts of a first solvent and 4-7 parts of a first curing agent; the outer layer is prepared from, by weight, 15-20 parts of a metronidazole modified graphene oxide composite material, 7-11 parts of polyimide resin, 3-5 parts of alpha-amino-alpha-imino-phosphonic acid inner salt, 1-2 parts of hydrophobic modified magnetic particles, 6-9 parts of a second curing agent, 5-10 parts of a second filler and 32-36 parts of a second solvent;the thickness ratio of the inner layer to the outer layer is 1:(3.2-3.6). The provided coating has a high anti-scaling rate and good anti-corrosion performance and anti-wax effect, and can be widelyapplied to tubing and casings, drill pipes, oil tubes and the like in protected oilfield exploitation.

Description

technical field [0001] The invention relates to the technical field of oilfield coatings, in particular to an anti-corrosion, anti-wax, anti-fouling coating and a preparation method thereof. Background technique [0002] At present, the crude oil produced in most oilfields is waxy crude oil, and the dissolved wax in crude oil (mainly C 15 -C 70 straight chain alkanes, which are solid at normal temperature, and become viscous liquids when mixed with colloids and asphaltenes in crude oil). Precipitate and condense on the wall of downhole equipment to form wax deposits. Waxing in the wellbore of oil wells will reduce production efficiency, and in severe cases, it will cause "wax stuck" and stop production; waxing in pipelines will reduce the effective flow cross-section of the pipeline, increase the delivery pressure, reduce the delivery capacity, and at the same time, it will cause the pipeline to stop. Restarting brings difficulties, and may cause pipe blockage accidents i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D179/08C09D161/14C09D5/08C09D5/16C09D5/24
CPCC08K2003/2227C08K2003/2241C08K2003/2296C08K2201/011C08L2201/04C08L2201/08C08L2205/025C08L2205/03C09D5/08C09D5/1662C09D5/1687C09D5/18C09D5/24C09D127/18C09D179/08C08L61/14C08L27/18C08K3/22C08K3/36C08K13/06C08K9/04C08K3/042
Inventor 武尚帅
Owner QINGYANG ZHOUYANG MACHINERY MFG
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