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Anti-corrosion, anti-wax and anti-scale coating and preparation method thereof

An anti-fouling and coating technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problems of low cost and less coating, and achieve cost reduction, excellent wear resistance, and good application prospects Effect

Pending Publication Date: 2019-10-11
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 and anti-scale coating and preparation method thereof
  • Anti-corrosion, anti-wax and anti-scale coating and preparation method thereof
  • Anti-corrosion, anti-wax and anti-scale coating and preparation method thereof

Examples

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preparation example Construction

[0023] 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

[0033] This embodiment provides an anti-corrosion, anti-wax, and anti-fouling coating. The raw material components are calculated in parts by weight, including: 10 parts by weight of metronidazole-modified graphene oxide composite material, 7 parts by weight of polysulfide-epoxy block copolymer Parts, 15 parts by weight of polyimide resin, 6 parts by weight of polytetrafluoroethylene resin, 1 part by weight of tetramethylthiuram disulfide, 19 parts by weight of filler, 40 parts by weight of solvent, 5 parts by weight of antiscalant and curing 6 parts by weight of agent.

[0034] Among them, the preparation method of the metronidazole-modified graphene oxide composite material includes the steps of: mixing flake graphite with concentrated sulfuric acid, ultrasonic dispersion, stirring and reacting in an ice bath for 20 minutes; adding sodium nitrate to continue the reaction for 20 minutes, and then adding permanganic acid Potassium reaction for 100 minutes; stir the obtained mi...

Embodiment 2

[0043] This embodiment provides a kind of anti-corrosion, anti-wax, anti-scaling coating, the raw material components are calculated by weight, including: 12 weight parts of metronidazole modified graphene oxide composite material, 4 weight parts of polysulfide-epoxy block copolymer Parts, 20 parts by weight of polyimide resin, 2 parts by weight of polytetrafluoroethylene resin, 2 parts by weight of tetramethylthiuram disulfide, 14 parts by weight of filler, 48 parts by weight of solvent, 3 parts by weight of antiscalant agent and curing 8 parts by weight.

[0044] Wherein, the preparation method of the metronidazole-modified graphene oxide composite material comprises the steps of: mixing flake graphite with concentrated sulfuric acid, stirring and reacting in an ice bath after ultrasonic dispersion for 25 minutes; adding sodium nitrate to continue the reaction for 25 minutes, and then adding permanganic acid Potassium reaction for 110min; stir the obtained mixture in an oil ...

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Abstract

The invention relates to an anti-corrosion, anti-wax and anti-scale coating and a preparation method thereof. The coating is prepared from, by weight, 10-12 parts of a metronidazole-modified grapheneoxide composite material, 4-7 parts of a polysulfide-epoxy block copolymer, 15-20 parts of polyimide resin, 2-6 parts of polytetrafluoroethylene resin, 1-2 parts of tetramethyl thiuram disulfide, 14-19 parts of a filler, 40-48 parts of a solvent, 3-5 parts of an anti-scale agent and 6-8 parts of a curing agent. The coating can effectively prevent the formation of barium and strontium sulfate scales and the like, the situation that pipelines and equipment are blocked by scaling is avoided, and the anti-scale rate is high; the anti-corrosion performance and the anti-wax effect are good, and thecoating has excellent wear resistance and high-temperature resistance and high impact strength; the curing time is short, and the engineering cycle can be shortened; the coating is convenient to prepare, low in cost, stable in performance and capable of being widely used for protecting oil casing pipes, drill rods, oil pipes and the like in 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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IPC IPC(8): C09D179/08C09D127/18C09D187/00C09D7/62C09D7/63C09D7/61C09D7/65C09D5/08C09D5/16C08F220/06C08F222/06C08F220/58C08G81/00
CPCC08F220/06C08G81/00C08K2003/2241C08K2003/2296C08K2201/011C09D5/08C09D5/1637C09D5/1662C09D5/1687C09D179/08C08L27/18C08L87/005C08K13/06C08K9/04C08K3/042C08K5/40C08K3/36C08K3/22
Inventor 武尚帅
Owner QINGYANG ZHOUYANG MACHINERY MFG
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