CN116265544A - Underground high-temperature-resistant anti-corrosion coating, and preparation method and application method thereof - Google Patents
Underground high-temperature-resistant anti-corrosion coating, and preparation method and application method thereof Download PDFInfo
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 9
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- 238000010438 heat treatment Methods 0.000 claims description 8
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention provides an underground high-temperature-resistant anti-corrosion coating, a preparation method and application thereof, which are obtained by mixing a certain proportion of organic silicon resin, epoxy resin, ceramic fiber, graphene, a curing agent and a coating auxiliary agent, and can protect a matrix from corrosion, oxidization, sealing and wear resistance in a high-temperature environment, and the underground high-temperature-resistant anti-corrosion coating is high in stability, can react with other active molecules in the high-temperature environment, and can prolong the service life of the underground matrix; the preparation method is simple to operate and can be applied to industrial production in a large amount; according to the method, the grade of the oil casing selected materials in the severe service environment can be reduced, and the well construction cost is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of metal material corrosion prevention, and particularly relates to an underground high-temperature-resistant corrosion-resistant coating, a preparation method and a use method thereof.
Background
In the development of oil and gas fields, in order to improve the recovery ratio, heating processes such as stratum heating, oil burning by fire, steam injection and the like are often adopted, and the bottom-hole temperature of part of the well reaches 350 ℃ and the wellhead temperature reaches 300 ℃. The flow state in the shaft is changed from liquid phase to gas-liquid phase and gas phase. Potential H-content in reservoir prediction fluid 2 S、CO 2 Elemental sulfur, predicted H 2 S partial pressure is more than or equal to 0.24MPa, CO 2 Partial pressure is more than or equal to 0.14MPa, and water type CaCl is produced 2 ，Cl - The content is more than or equal to 32.5g/L, the service environment of a shaft is very harsh, and the oil casing pipe can have high-temperature corrosion and H 2 S-induced sulfide stress corrosion cracking, CO 2 Electrochemical corrosion is caused.
For such high temperatures, high H content 2 S、CO 2 The oil-gas well and oil casing are very difficult to select, according to the existing material selection standard, the ordinary carbon steel, cr-containing stainless steel and nickel-based alloy can not meet the working condition, titanium alloy and cobalt-based alloy materials are needed, but the manufacturers of the pipe are few, the industrial application data are lack, the price is 30-40 times of that of the ordinary carbon steel, the price is high, and the economical efficiency is poor.
Therefore, the high-temperature coating is applied to meet the actual working condition of the oil gas well on the basis of the common carbon steel material, and the well construction cost of the oil gas well is reduced.
Aiming at the high-temperature-resistant anti-corrosion coating, the problems of flame retardance and corrosion resistance of the wood building material and the furniture coating are solved in the prior art. The main raw materials are aqueous epoxy resin, acrylic resin, castor oil polyglycidyl ether, polyether modified organic silicon, isopropyl triphenyl phosphate and the like, and the materials are stirred and mixed at the temperature of 170-180 ℃ and the temperature of 90 ℃ and the temperature of 45-50 ℃ in 3 temperature sections.
In the prior art, the main components of the composite material are titanium carbide, silicone adhesive, glass fiber, graphite powder, rare earth oxide and the like, and the composite material is prepared by stirring and mixing at the temperature of between 700 and 900 ℃ for 2 to 3 hours at the temperature of between 100 and 200 ℃ for 10 to 15 minutes.
In the prior art, the problem of insufficient adhesion between a Si-C-N coating and a matrix in a C/C composite material is solved. The C/C composite material shows that the Si-C-N coating and whisker-shaped products thereof are generated, and the SiC coating is prepared by adopting plasma spraying, static pressure forming and high-temperature sintering on the outer layer.
In the prior art, nano silicon dioxide and carbon fiber are added into epoxy resin and phenolic resin to strengthen and prepare high-temperature-resistant composite gel, so that the mechanical property of the coating is improved.
The anticorrosive coating is widely applied in various fields, but the application temperature is mostly within 120 ℃ and basically not more than 175 ℃. From the disclosed high-temperature-resistant coating (more than or equal to 200 ℃) patent, the coating is mainly designed and prepared from the aspects of heat resistance, fire resistance, mechanical property improvement and the like, and is not suitable for the special high-temperature-resistant (more than or equal to 300 ℃) and corrosion-resistant technical requirements under the oil field.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the underground high-temperature-resistant anti-corrosion coating, the preparation method and the use method thereof, which reduce the material selection grade of the oil casing in the severe service environment and greatly reduce the well construction cost.
The invention is realized by the following technical scheme:
the underground high-temperature-resistant anti-corrosion coating is characterized by comprising, by mass, 35% -50% of organic silicon resin, 20% -35% of epoxy resin, 5% -8% of ceramic fibers, 5% -8% of graphene, 3% -6% of a curing agent and 3% -6% of a coating auxiliary agent;
the coating auxiliary agent comprises an anti-settling agent, a dispersing agent and a defoaming agent, wherein the weight ratio of the anti-settling agent to the dispersing agent to the defoaming agent is 1:1:2.
Further, the ceramic fiber adopts aluminum silicate fiber, carbon fiber or quartz fiber.
Further, the curing agent adopts diethylenetriamine, triethylenetetramine or m-trimellitic amine.
Further, HPMA is used as the dispersing agent.
Furthermore, the anti-settling agent adopts organic bentonite.
Further, the defoamer adopts polydimethylsiloxane.
The preparation method of the underground high-temperature-resistant anti-corrosion coating is characterized by comprising the following steps of:
s1: adding epoxy resin into organic silicon resin, and uniformly stirring and mixing to obtain first mixed resin;
s2: adding the coating auxiliary agent and the curing agent into the first mixed resin, and uniformly stirring and mixing to obtain a second mixed resin;
s3: and adding the ceramic fiber and the graphene into the second mixed resin, and stirring at a speed of more than 1000 revolutions per minute for not less than 15 minutes by using a stirrer to fully stir and mix the ceramic fiber and the graphene, so as to obtain the underground high-temperature-resistant anticorrosive coating.
The application method of the underground high-temperature-resistant anti-corrosion coating is characterized by comprising the following steps of:
a1: brushing the underground high-temperature-resistant anti-corrosion coating on a workpiece, and curing for 48 hours at room temperature;
a2: and heating the cured workpiece to 90 ℃ for curing for 12 hours, and then heating to 200 ℃ for curing for 2 hours.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides an underground high-temperature-resistant anti-corrosion coating, a preparation method and application thereof, which are obtained by mixing a certain proportion of organic silicon resin, epoxy resin, ceramic fiber, graphene, a curing agent and a coating auxiliary agent, and can protect a matrix from corrosion, oxidization, sealing and wear resistance in a high-temperature environment, and the underground high-temperature-resistant anti-corrosion coating is high in stability, can react with other active molecules in the high-temperature environment, and can prolong the service life of the underground matrix; the preparation method is simple to operate and can be applied to industrial production in a large amount; according to the method, the grade of the oil casing selected materials in the severe service environment can be reduced, and the well construction cost is greatly reduced.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
In order that those skilled in the art will better understand the present invention, a technical solution of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides an underground high-temperature-resistant anti-corrosion coating, a preparation method and a use method thereof;
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100 percent, wherein the raw materials comprise 35 to 50 percent of organic silicon resin, 20 to 35 percent of epoxy resin, 5 to 8 percent of ceramic fiber, 5 to 8 percent of graphene, 3 to 6 percent of curing agent and 3 to 6 percent of coating auxiliary agent;
the coating auxiliary agent comprises an anti-settling agent, a dispersing agent and a defoaming agent, wherein the weight ratio of the anti-settling agent to the dispersing agent to the defoaming agent is 1:1:2.
Further, the ceramic fibers include aluminum silicate fibers, carbon fibers, and quartz fibers.
Further, the curing agent comprises diethylenetriamine, triethylenetetramine and m-trimellitic amine.
Further, HPMA is used as the dispersing agent.
Furthermore, the anti-settling agent adopts organic bentonite.
Further, the defoamer adopts polydimethylsiloxane.
The preparation method of the underground high-temperature-resistant anti-corrosion coating comprises the following steps:
s1: adding epoxy resin into organic silicon resin, and uniformly stirring and mixing to obtain first mixed resin;
s2: adding the coating auxiliary agent and the curing agent into the first mixed resin, and uniformly stirring and mixing to obtain a second mixed resin;
s3: and adding the ceramic fiber and the graphene into the second mixed resin, and stirring at a speed of more than 1000 revolutions per minute for not less than 15 minutes by using a stirrer to fully stir and mix the ceramic fiber and the graphene, so as to obtain the underground high-temperature-resistant anticorrosive coating.
An application of a downhole high temperature resistant corrosion resistant coating, comprising the steps of:
a1: brushing the underground high-temperature-resistant anti-corrosion coating on a workpiece, and curing for 48 hours at room temperature;
a2: and heating the workpiece subjected to the fixed telephone to 90 ℃ for curing for 12 hours, and then heating to 200 ℃ for curing for 2 hours.
Example 1:
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100%, and comprises the following raw materials of 37% of organic silicon resin, 35% of epoxy resin, 8% of aluminum silicate fiber, 8% of graphene and 6% of diethylenetriamine; 6% of a coating auxiliary agent; the coating auxiliary agent comprises an anti-settling agent, HPMA and an antifoaming agent, and the weight ratio of the anti-settling agent to the HPMA to the antifoaming agent is 1:1:2.
1) Adding epoxy resin into the organic silicon resin, and uniformly stirring and mixing;
2) Adding the coating auxiliary agent and diethylenetriamine into the mixed resin in the step 1), and uniformly stirring and mixing;
3) Adding aluminum silicate fibers and graphene into the mixed resin in the step 2), and stirring at a speed higher than 1000 revolutions per minute for more than 15 minutes by using a stirrer to fully stir and mix the aluminum silicate fibers and the graphene, thereby obtaining the coating;
4) And (3) brushing the coating obtained in the step (3) on a workpiece, curing for 48 hours at room temperature, then curing for 12 hours at the temperature of 90 ℃, and then curing for 2 hours at the temperature of 200 ℃ to obtain the cured coating.
Example 2:
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100%, and adopts the raw materials comprising 50% of organic silicon resin, 30% of epoxy resin, 5% of carbon fiber, 5% of graphene and 6% of triethylene tetramine; 5% of a coating auxiliary agent; the coating auxiliary agent comprises an anti-settling agent, HPMA and an antifoaming agent, and the weight ratio of the anti-settling agent to the HPMA to the antifoaming agent is 1:1:2.
1) Adding epoxy resin into the organic silicon resin, and uniformly stirring and mixing;
2) Adding the coating auxiliary agent and triethylene tetramine into the mixed resin in the step 1), and uniformly stirring and mixing;
3) Adding carbon fiber and graphene into the mixed resin in the step 2), and stirring at a speed higher than 1000 revolutions per minute for more than 15 minutes by using a stirrer to fully stir and mix the carbon fiber and the graphene, thereby obtaining the coating;
4) And (3) brushing the coating obtained in the step (3) on a workpiece, curing for 48 hours at room temperature, then curing for 12 hours at the temperature of 90 ℃, and then curing for 2 hours at the temperature of 200 ℃ to obtain the cured coating.
Example 3:
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100%, and comprises the following raw materials of 50% of organic silicon resin, 25% of epoxy resin, 8% of quartz fiber, 8% of graphene and 5% of m-trimellitic amine; 4% of a coating auxiliary agent; the coating auxiliary agent comprises an anti-settling agent, HPMA and an antifoaming agent, and the weight ratio of the anti-settling agent to the HPMA to the antifoaming agent is 1:1:2.
1) Adding epoxy resin into the organic silicon resin, and uniformly stirring and mixing;
2) Adding the coating auxiliary agent and the m-trimellitic amine into the mixed resin in the step 1), and uniformly stirring and mixing;
3) Adding quartz fiber and graphene into the mixed resin in the step 2), and stirring at a speed higher than 1000 revolutions per minute for more than 15 minutes by using a stirrer to fully stir and mix the quartz fiber and the graphene, thereby obtaining the coating;
4) And (3) brushing the coating obtained in the step (3) on a workpiece, curing for 48 hours at room temperature, then curing for 12 hours at the temperature of 90 ℃, and then curing for 2 hours at the temperature of 200 ℃ to obtain the cured coating.
Example 4:
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100%, and comprises the following raw materials of 40% of organic silicon resin, 35% of epoxy resin, 5% of aluminum silicate fiber, 8% of graphene and 6% of diethylenetriamine; 6% of a coating auxiliary agent; the coating auxiliary agent comprises an anti-settling agent, HPMA and an antifoaming agent, and the weight ratio of the anti-settling agent to the HPMA to the antifoaming agent is 1:1:2.
1) Adding epoxy resin into the organic silicon resin, and uniformly stirring and mixing;
2) Adding the coating auxiliary agent and diethylenetriamine into the mixed resin in the step 1), and uniformly stirring and mixing;
3) Adding aluminum silicate fibers and graphene into the mixed resin in the step 2), and stirring at a speed higher than 1000 revolutions per minute for more than 15 minutes by using a stirrer to fully stir and mix the aluminum silicate fibers and the graphene, thereby obtaining the coating;
4) And (3) brushing the coating obtained in the step (3) on a workpiece, curing for 48 hours at room temperature, then curing for 12 hours at the temperature of 90 ℃, and then curing for 2 hours at the temperature of 200 ℃ to obtain the cured coating.
The present invention provides a preferred embodiment 5 as follows:
the underground high-temperature-resistant anticorrosive coating takes the total mass of the raw materials of the underground high-temperature-resistant anticorrosive coating as 100%, and comprises the following raw materials of 50% of organic silicon resin, 34% of epoxy resin, 5% of carbon fiber, 5% of graphene and 3% of triethylene tetramine; 3% of a coating auxiliary agent; the coating auxiliary agent comprises an anti-settling agent, HPMA and an antifoaming agent, and the weight ratio of the anti-settling agent to the HPMA to the antifoaming agent is 1:1:2.
1) Adding epoxy resin into the organic silicon resin, and uniformly stirring and mixing;
2) Adding the coating auxiliary agent and triethylene tetramine into the mixed resin in the step 1), and uniformly stirring and mixing;
3) Adding carbon fiber and graphene into the mixed resin in the step 2), and stirring at a speed higher than 1000 revolutions per minute for more than 15 minutes by using a stirrer to fully stir and mix the carbon fiber and the graphene, thereby obtaining the coating;
4) And (3) brushing the coating obtained in the step (3) on a workpiece, curing for 48 hours at room temperature, then curing for 12 hours at the temperature of 90 ℃, and then curing for 2 hours at the temperature of 200 ℃ to obtain the cured coating.
Corrosion resistance test:
corrosion resistance test is carried out in an autoclave by simulating a high-temperature high-pressure acidic environment under the well, wherein the simulated environment is at a temperature of 300 ℃, the total pressure is 2MPa, and CO 2 The partial pressure was 0.5MPa, the soaking time was 168 hours, the solution was simulated coagulation water, and the simulated solution environment was as shown in Table 1. The sample with the coating is put into an autoclave to be soaked according to the conditions, and after being soaked for 168 hours, the sample is taken out to observe whether the surface has damage marks or not.
TABLE 1 simulation of condensate water ion composition
Adhesion test: the adhesive force test is carried out according to the national standard GB/T1720-2020 paint film circle drawing test, and the test result is as follows:
the invention provides an underground high-temperature-resistant anti-corrosion coating, a preparation method and application thereof, which are obtained by mixing a certain proportion of organic silicon resin, epoxy resin, ceramic fiber, graphene, a curing agent and a coating auxiliary agent, and can protect a matrix from corrosion, oxidization, sealing and wear resistance in a high-temperature environment, and the underground high-temperature-resistant anti-corrosion coating is high in stability, can react with other active molecules in the high-temperature environment, and can prolong the service life of the underground matrix; the preparation method is simple to operate and can be applied to industrial production in a large amount; according to the method, the grade of the oil casing selected materials in the severe service environment can be reduced, and the well construction cost is greatly reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.
Claims (8)
1. The underground high-temperature-resistant anti-corrosion coating is characterized by comprising, by mass, 35% -50% of organic silicon resin, 20% -35% of epoxy resin, 5% -8% of ceramic fibers, 5% -8% of graphene, 3% -6% of a curing agent and 3% -6% of a coating auxiliary agent;
the coating auxiliary agent comprises an anti-settling agent, a dispersing agent and a defoaming agent, wherein the weight ratio of the anti-settling agent to the dispersing agent to the defoaming agent is 1:1:2.
2. A downhole high temperature resistant corrosion resistant coating according to claim 1, wherein said ceramic fibers are aluminum silicate fibers, carbon fibers or quartz fibers.
3. A downhole high temperature resistant corrosion protection coating according to claim 1, wherein the curing agent is diethylenetriamine, triethylenetetramine or m-trimellitic amine.
4. A downhole high temperature resistant corrosion protection coating according to claim 1, wherein the dispersant is HPMA.
5. A downhole high temperature resistant corrosion resistant coating according to claim 1, wherein the anti-settling agent is organobentonite.
6. A downhole high temperature resistant corrosion resistant coating according to claim 1, wherein said defoamer is polydimethylsiloxane.
7. A method for preparing a downhole high temperature resistant corrosion resistant coating, characterized in that the method is based on any one of the downhole high temperature resistant corrosion resistant coatings of claims 1-6, comprising the steps of:
s1: adding epoxy resin into organic silicon resin, and uniformly stirring and mixing to obtain first mixed resin;
s2: adding the coating auxiliary agent and the curing agent into the first mixed resin, and uniformly stirring and mixing to obtain a second mixed resin;
s3: and adding the ceramic fiber and the graphene into the second mixed resin, and stirring at a speed of more than 1000 revolutions per minute for not less than 15 minutes by using a stirrer to fully stir and mix the ceramic fiber and the graphene, so as to obtain the underground high-temperature-resistant anticorrosive coating.
8. A method of using a downhole high temperature resistant corrosion resistant coating, characterized in that it is based on any of the downhole high temperature resistant corrosion resistant coatings according to claims 1-6, comprising the steps of:
a1: brushing the underground high-temperature-resistant anti-corrosion coating on a workpiece, and curing for 48 hours at room temperature;
a2: and heating the cured workpiece to 90 ℃ for curing for 12 hours, and then heating to 200 ℃ for curing for 2 hours.
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