阅读说明：本技术 一种油井管用高附着力内涂防腐涂料及其制备方法 (High-adhesion internal coating anticorrosive paint for oil well pipe and preparation method thereof ) 是由 陈海林 蒋灿 赵海涛 姚佳林 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种油井管用高附着力内涂防腐涂料,按质量百分数计由如下组分组成：5-10％丙烯酸树脂、1-2％氨基树脂、25-40％碱式酚醛树脂、8-15％填料、10-15％环氧树脂、2-8％甲基异丁基酮、5-10％乙醇及8-15％丙二醇单甲醚醋酸酯。本发明还公开了一种油井管用高附着力内涂防腐涂料的制备方法。本发明的油井管用高附着力内涂防腐涂料,具有优异的附着力,满足油井管涂层测试标准SY/T 6717(2016)以及SY/T 0544(2016)中高温高压釜测试。使用本发明的涂料,可延长油井管的使用寿命。(The invention discloses a high-adhesion internal coating anticorrosive paint for oil well pipes, which comprises the following components in percentage by mass: 5-10% of acrylic resin, 1-2% of amino resin, 25-40% of basic phenolic resin, 8-15% of filler, 10-15% of epoxy resin, 2-8% of methyl isobutyl ketone, 5-10% of ethanol and 8-15% of propylene glycol monomethyl ether acetate. The invention also discloses a preparation method of the high-adhesion internal coating anticorrosive paint for the oil well pipe. The high-adhesion internal coating anticorrosive paint for the oil well pipe has excellent adhesion, and meets the test standards of SY/T6717 (2016) and SY/T0544 (2016) of a medium-high temperature autoclave test of the oil well pipe coating. The coating of the invention can prolong the service life of the oil well pipe.)

1. The high-adhesion internal coating anticorrosive paint for the oil well pipe is characterized by comprising the following components in percentage by mass: 5-10% of acrylic resin, 1-2% of amino resin, 25-40% of basic phenolic resin, 8-15% of filler, 10-15% of epoxy resin, 2-8% of methyl isobutyl ketone, 5-10% of ethanol and 8-15% of propylene glycol monomethyl ether acetate.

2. The high-adhesion undercoating anticorrosive paint for oil well pipes according to claim 1, wherein the amino resin is at least one of methylated iminotrimeric amine resin or butylated iminotrimeric amine resin.

3. The high-adhesion undercoating anticorrosion paint for oil well pipes as claimed in claim 1, wherein said epoxy resin is solvent-type bisphenol A epoxy resin.

4. The high-adhesion undercoating anticorrosive paint for oil well pipes as claimed in claim 1 or 3, wherein the epoxy resin has an epoxy equivalent of 220-500.

5. The high-adhesion undercoating anticorrosive paint for oil well pipes according to claim 1, characterized in that the filler is an acid-and alkali-resistant filler.

6. The high-adhesion undercoating anticorrosive paint for oil well pipes of claim 5, wherein the acid and alkali resistant filler is iron oxide red, talc or titanium dioxide.

7. The high-adhesion undercoating corrosion-resistant coating for oil country tubular goods as claimed in claim 1, wherein the hydroxyl value of said acrylic resin is 35mgKOH/g or more.

8. A method for producing a high-adhesion, internally-applied corrosion protective coating for oil well pipes according to any one of claims 1 to 7, comprising the steps of:

preparing an intermediate: mixing amino resin, epoxy resin, acrylic resin, propylene glycol monomethyl ether acetate and a filler, and shearing at 65-75 ℃ for 30-50min to obtain an intermediate;

preparing a coating: and adding the basic phenolic resin, ethanol and methyl isobutyl ketone into the intermediate, and shearing and dispersing to prepare the high-adhesion internal-coating anticorrosive paint for the oil well pipe.

9. The method for producing a high-adhesion, internally coated corrosion protective coating for oil well pipes according to claim 8, wherein the high-adhesion, internally coated corrosion protective coating for oil well pipes is composed of, in mass percent: 5-10% of acrylic resin, 1-2% of amino resin, 25-40% of basic phenolic resin, 8-15% of filler, 10-15% of epoxy resin, 2-8% of methyl isobutyl ketone, 5-10% of ethanol and 8-15% of propylene glycol monomethyl ether acetate.

Technical Field

The invention relates to the technical field of oil exploitation, in particular to a high-adhesion internal coating anticorrosive paint for an oil well pipe and a preparation method thereof.

Background

In the field of oil exploitation, drill pipe exploitation and oil pipes are generally adopted to convey crude oil from oil wells to a bottom surface pipe network, the oil exploitation depth generally reaches 3000m underground, the underground temperature can reach 120 ℃, the pressure can reach 25Mpa, substances containing salt such as drilling fluid and the like can be injected in the exploitation process, the oil wells can contain corrosive gas such as hydrogen sulfide and the like, the service conditions of oil well pipe coatings are extremely harsh, the temperature and the pressure of the oil pipe drill pipes in service can be higher according to different geological conditions, the adhesion requirements on the coatings are extremely high, and the coatings need to pass high-temperature autoclave tests of SY/T6717 (2016) and SY/T0544 (2016).

Therefore, it is highly desirable to provide a coating material for oil country tubular goods, which has excellent mechanical and chemical properties through high-temperature autoclave tests, to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems and provides a high-adhesion inner coating anticorrosive paint for an oil well pipe, which has excellent adhesion and meets the harsh environment of high temperature and high pressure in the application of oil well pipe coatings.

In order to achieve the purpose, the invention adopts the following technical scheme.

The high-adhesion internal coating anticorrosive paint for the oil well pipe comprises the following components in percentage by mass: 5-10% of acrylic resin, 1-2% of amino resin, 25-40% of basic phenolic resin, 8-15% of filler, 10-15% of epoxy resin, 2-8% of methyl isobutyl ketone, 5-10% of ethanol and 8-15% of propylene glycol monomethyl ether acetate.

Further, the amino resin is at least one of methylated imino triamino resin or butylated imino trimerization amine resin.

Further, the amino resin is a CYMEL 325 resin, a CYMEL 327 resin, or a CYMEL1158 resin.

Further, the epoxy resin is solvent-based bisphenol A epoxy resin.

Further, the epoxy resin has an epoxy equivalent of 220-500.

Further, the epoxy resin is NPSN-301X 75, NPSN 901X 75 or NPSN-134X 80.

Further, the filler is an acid-base resistant filler.

Further, the acid and alkali resistant filler is iron oxide red, talcum powder or titanium dioxide.

Further, the hydroxyl value of the acrylic resin is more than or equal to 35 mgKOH/g.

Further, the acrylic resin is acrylic resin AC-165 or acrylic resin AC-166.

A preparation method of a high-adhesion internal coating anticorrosive paint for oil well pipes comprises the following steps:

preparing an intermediate: mixing amino resin, epoxy resin, acrylic resin, propylene glycol monomethyl ether acetate and a filler, and shearing at 65-75 ℃ for 30-50min to obtain an intermediate;

preparing a coating: and adding the basic phenolic resin, ethanol and methyl isobutyl ketone into the intermediate, and shearing and dispersing to prepare the coating.

Further, the high-adhesion internal-coating anticorrosive coating for the oil well pipe comprises the following components in percentage by mass: 5-10% of acrylic resin, 1-2% of amino resin, 25-40% of basic phenolic resin, 8-15% of filler, 10-15% of epoxy resin, 2-8% of methyl isobutyl ketone, 5-10% of ethanol and 8-15% of propylene glycol monomethyl ether acetate.

The materials used in the present invention are all commercially available materials.

The invention has the beneficial effects that: the high-adhesion internal coating anticorrosive paint for the oil well pipe has excellent mechanical property and chemical property, good adhesion and anticorrosive effect, meets the use requirement of the oil well pipe coating, and can prolong the service life of the oil well pipe through high-temperature high-pressure autoclave tests in oil well pipe coating test standards SY/T6717 (2016) and SY/T0544 (2016).

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.