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CN-122011888-A - High-temperature-resistant wear-resistant heavy-duty anticorrosive paint for petroleum drilling oil pipe and preparation method thereof

CN122011888ACN 122011888 ACN122011888 ACN 122011888ACN-122011888-A

Abstract

The invention discloses a high temperature resistant wear resistant heavy anti-corrosion coating for petroleum drilling oil pipe and a preparation method thereof, which takes epoxy resin and boron phenolic resin as matrix resin, the high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for the petroleum drilling oil pipe is prepared by taking a graphene/titanium nano/nano alumina epoxy polymer and a toughening agent as modifiers, adding functional pigment and filler, and matching with a diluent, an auxiliary agent and a curing agent. The coating has the advantages of high temperature resistance of 200 ℃, high wear resistance, heavy corrosion resistance, high hardness (6H), scaling resistance, good toughness and the like. The coating material is suitable for coating protection of drill rods, sleeves, oil pipes, oil and gas transmission pipes, sucker rods, underground equipment and the like of petroleum wells.

Inventors

  • LI JINGBIN
  • LIU CHENGLOU

Assignees

  • 吉林省亚太方舟科技有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (5)

  1. 1. The high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for the petroleum drilling oil pipe is characterized by comprising a component A and a component B in percentage by mass; The component A comprises, by mass, 5-10% of epoxy resin, 5-10% of boron phenolic resin, 10-30% of graphene/titanium nano/nano alumina epoxy polymer, 3-8% of a toughening agent, 4-8% of rutile type titanium dioxide, 3-6% of silicon carbide powder, 5-10% of precipitated barium sulfate, 5-10% of talcum powder, 3-8% of molybdenum disulfide powder, 0.5-1% of an anti-settling agent, 0.5-1% of a thickening agent, 0.5-1% of a dispersing agent, 0.2-0.5% of a defoaming agent, 0.3-0.5% of a leveling agent and 25-35% of a mixed solvent; the component B is a T31 phenolic aldehyde amine curing agent.
  2. 2. The high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for petroleum drilling pipes, which is characterized by comprising, by mass, 30-50% of a bisphenol A type epoxy resin, 5-10% of liquid nitrile rubber, 10-20% of metallic titanium powder, 2-5% of expanded graphite, 1-2% of nano aluminum oxide, 0.1-0.5% of a silane coupling agent, 1-2% of a dispersing agent, 0.3-0.5% of a defoaming agent, 0.5-1% of a catalyst and 30-40% of a solvent.
  3. 3. The method for preparing the high-temperature-resistant wear-resistant heavy-duty coating for the petroleum drilling oil pipe, according to claim 2, is characterized in that the preparation of the component A: Adding a mixed solvent into a dispersion tank, adding epoxy resin, boron phenolic resin and a toughening agent under a medium-low speed stirring state, uniformly mixing, adding a dispersing agent, a defoaming agent and pigment filler, dispersing at a high speed for 30 minutes, and grinding by a sand mill until the fineness reaches 20 mu m to obtain pigment slurry; And secondly, transferring the pigment slurry into a paint mixing cylinder, adding an anti-settling agent, a thickening agent, a graphene/titanium nano/nano aluminum oxide epoxy-based polymer and a leveling agent under medium-speed stirring conditions, stirring for 30 minutes, filtering and packaging.
  4. 4. The method for preparing the high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for the petroleum drilling oil pipe, according to claim 3, wherein the component B is prepared by the following steps: the first step is to implement construction proportion, wherein the mass proportion is that component A and component B are 100:5 Secondly, executing a curing process, wherein after the steel pipe is coated by a spray coating method and a dip coating method, the steel pipe is kept at a constant temperature of 70 ℃ for 0.5 hour; Thirdly, heating to 107 ℃ and keeping for 0.5 hour; fourthly, heating to 140 ℃ for 0.5 hour; And fifthly, finally, raising the temperature to 170 ℃ and curing for 2 hours.
  5. 5. The preparation method of the high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for the petroleum drilling oil pipe, which is characterized by comprising the following steps of: Freezing expanded graphite powder, namely freezing the expanded graphite powder for more than 12 hours at the temperature of-20 ℃ for later use; Weighing according to a proportion, injecting a mixed solvent into a stirring tank, sequentially adding epoxy resin, a dispersing agent, a defoaming agent and organic bentonite in the stirring process, and fully stirring until the components are uniformly dissolved to prepare a polymer solution; And thirdly, filling the polymer solution, titanium powder, frozen expanded graphite and nano alumina into a ball milling tank of a planetary ball mill, controlling the ball-material ratio to be 4:1, setting the rotating speed to be 600r/min, grinding for 6 hours, and pouring into an ultrasonic oscillator for dispersing for 30 minutes to obtain the graphene/nano titanium/alumina epoxy-based polymer with the particle size of 50-80 nm.

Description

High-temperature-resistant wear-resistant heavy-duty anticorrosive paint for petroleum drilling oil pipe and preparation method thereof Technical Field The invention relates to the technical field of protective paint for oil field petroleum equipment, in particular to high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for petroleum drilling pipes and a preparation method thereof. Background The oilfield drilling petroleum pipe comprises a drill rod, a sleeve, an oil pipe, an oil delivery pipe, a sucker rod, underground equipment and the like. With the development of geology such as petroleum drilling toward deep wells and sulfureted hydrogen, the working environment of petroleum pipes and underground equipment is very bad, and the temperature of an oil and gas well can reach 180 ℃, the pressure can reach 100MPa, and the petroleum pipe and the underground equipment are high in sulfureted hydrogen, carbon dioxide, chlorine and other strong corrosive media. The requirements on high temperature resistance, wear resistance and corrosion resistance of drill pipes, sleeves and oil pipes are increasing. The investment of the oil casing only accounts for 50% -60% of the total investment of the whole well drilling and oil extraction, the corrosion loss of the oil casing caused by factors such as hydrogen sulfide, produced liquid medium, high temperature and the like can reach hundreds of millions of yuan each year, and the indirect losses such as leakage, pollution, production stopping and the like caused by the corrosion loss are difficult to calculate. Corrosion of petroleum pipes has become an urgent problem to be solved. At present, epoxy phenolic aldehyde series paint is adopted as the petroleum pipe protective paint. Although the coating has wear-resistant, corrosion-resistant and temperature-resistant properties, the comprehensive properties of the coating are reduced when the coating is used in oil-gas wells with the temperature higher than 100 ℃. When the coating is soaked in corrosive media such as hydrogen sulfide, carbon dioxide, chlorine radical and salt at 140 ℃ and high pressure of 35MPa for one week, bubbling and falling phenomena of the coating can occur. The high temperature resistance, the wear resistance, the scaling resistance and the heavy corrosion resistance of the petroleum pipe protective coating are improved, the service life of the petroleum pipe is prolonged, and the technical problem which is needed to be solved at present is solved. Disclosure of Invention The invention aims to provide a high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for petroleum drilling oil pipes and a preparation method thereof, so as to solve the problems in the prior art. The high-temperature-resistant wear-resistant heavy-duty anticorrosive paint for the petroleum drilling oil pipe and the preparation method thereof comprise the following steps of the paint comprising a component A and a component B in percentage by mass; The component A comprises, by mass, 5-10% of epoxy resin, 5-10% of boron phenolic resin, 10-30% of graphene/titanium nano/nano alumina epoxy polymer, 3-8% of a toughening agent, 4-8% of rutile type titanium dioxide, 3-6% of silicon carbide powder, 5-10% of precipitated barium sulfate, 5-10% of talcum powder, 3-8% of molybdenum disulfide powder, 0.5-1% of an anti-settling agent, 0.5-1% of a thickening agent, 0.5-1% of a dispersing agent, 0.2-0.5% of a defoaming agent, 0.3-0.5% of a leveling agent and 25-35% of a mixed solvent; the component B is a T31 phenolic aldehyde amine curing agent. Preferably, the graphene/titanium nano/nano alumina epoxy polymer comprises, by mass, 30-50% of bisphenol A epoxy resin, 5-10% of liquid nitrile rubber, 10-20% of metallic titanium powder, 2-5% of expanded graphite, 1-2% of nano alumina, 0.1-0.5% of silane coupling agent, 1-2% of dispersing agent, 0.3-0.5% of defoaming agent, 0.5-1% of catalyst and 30-40% of solvent. Preferably, the preparation of component A: Adding a mixed solvent into a dispersion tank, adding epoxy resin, boron phenolic resin and a toughening agent under a medium-low speed stirring state, uniformly mixing, adding a dispersing agent, a defoaming agent and pigment filler, dispersing at a high speed for 30 minutes, and grinding by a sand mill until the fineness reaches 20 mu m to obtain pigment slurry; And secondly, transferring the pigment slurry into a paint mixing cylinder, adding an anti-settling agent, a thickening agent, a graphene/titanium nano/nano aluminum oxide epoxy-based polymer and a leveling agent under medium-speed stirring conditions, stirring for 30 minutes, filtering and packaging. Preferably, the preparation of the component B: the first step is to implement construction proportion, wherein the mass proportion is that component A and component B are 100:5 Secondly, executing a curing process, and after the steel pipe is coated by methods such as spraying, dip coating and the lik