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A kind of preparation method of inner protective coating for oil casing storage

An internal protection, oil casing technology, used in anti-corrosion coatings, epoxy resin coatings, coatings, etc., to achieve the effect of improving impermeability, good resistance reduction effect, and good alkali resistance.

Inactive Publication Date: 2018-11-27
CHINA GASOLINEEUM TECH & DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, China has gradually conducted in-depth discussions on this issue, and gradually tried to use drag-reducing coatings, but the development of this technology is still at the stage of exploration and trial.

Method used

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  • A kind of preparation method of inner protective coating for oil casing storage
  • A kind of preparation method of inner protective coating for oil casing storage
  • A kind of preparation method of inner protective coating for oil casing storage

Examples

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Effect test

Embodiment 1

[0034] Example 1: A kind of internal protective coating for oil casing storage

[0035] The main formula includes: 36.1 parts of water; 36.1 parts of water-based epoxy resin emulsion; 6.1 parts of flake graphite; 3.2 parts of aniline; 0.45 parts of film-forming aid; 0.65 parts of thickener; 16.5 servings.

Embodiment 2

[0036] Example 2: An inner protective coating for oil casing storage

[0037] The main formula includes: 37 parts of water; 34 parts of water-based epoxy resin emulsion; 7 parts of flake graphite; 4 parts of aniline; 0.4 part of film-forming aid; 0.7 part of thickener; 15.8 servings.

Embodiment 3

[0038] Embodiment 3: A method for preparing an inner protective coating for storage of oil and casing according to the embodiment, comprising the following steps:

[0039] 1) Emulsification of epoxy resin

[0040] After heating 300g of epoxy resin in a water bath at 70°C for 20min, put it into an ultrasonic instrument, add 12.6g of octylphenol polyoxyethylene (10) ether, polyoxyethylene ether under the action of a 6000r / min high-shear mixing emulsifier 0.21g of sorbitan monolaurate, 6.3g of sodium lauryl sulfate and 15ml of propylene glycol methyl ether, the selection and proportioning of the emulsifier in the above ratio have a good emulsification effect, and the stability of the emulsion after emulsification is better, After reacting for 5 minutes, keep the temperature at 70°C and add hot water at 80°C dropwise, and continue to perform 6000r / min high-speed shearing for 10 minutes, then add the remaining water dropwise, the total amount of water added is 170ml, and the method...

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Abstract

The invention discloses internal protective paint for storage of a tubing and a preparation method, and mainly relates to the field of anti-corrosive paint for petroleum gas pipelines. The internal protective coating comprises the following raw materials in parts by mass: 30-40 parts of water, 30-40 parts of an aqueous epoxy resin emulsion, 5-8 parts of flake graphite, 2-4 parts of benzenamine, 0.3-0.6 part of a filming addition agent, 0.5-0.8 part of a thickening agent, 0.5-0.6 part of a dispersing agent, 0.2-0.3 part of an antifoaming agent, and 15-18 parts of pigments and fillers. The preparation method mainly comprises the steps of emulsifying epoxy resin, modifying polyaniline with the flake graphite and preparing the paint. The internal protective paint disclosed by the invention has the beneficial effects that the anticorrosion property and the drag reduction capacity are notably improved, new thought and possibility are provided for the exploration of the internal protective coating in the field, and the internal protective paint has high economic values and social significance.

Description

technical field [0001] The invention relates to the field of anticorrosion coatings for oil and gas pipelines, in particular to a method for preparing internal protective coatings for storage of oil and casing pipes. Background technique [0002] As the world's energy continues to be tense and the country's efforts to explore and develop oil and gas are intensified, pipelines and equipment for oil field production and storage have become important hardware support for oil and gas development. Since the inner wall of the oil casing has been in contact with oil for a long time, there are mainly the following two problems in specific maintenance. [0003] First of all, it is the corrosion problem of the surface layer of the inner wall. The corrosion problems faced by the petroleum industry mainly include the corrosion of ground facilities such as pipelines and storage tanks, underground facilities such as casing pipes and sucker rods, and key equipment such as pumps and valves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D179/02C09D5/08C09D7/61
CPCC08L2203/18C08L2205/03C09D5/08C09D163/00C08L71/02C08L79/02C08K13/04C08K7/00C08K3/04C08K5/41
Inventor 高进伟曹杉时文
Owner CHINA GASOLINEEUM TECH & DEV CORP
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