CN111117421A - Aerogel composite coating and application thereof in underground oil pipe - Google Patents
Aerogel composite coating and application thereof in underground oil pipe Download PDFInfo
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- CN111117421A CN111117421A CN201911293525.8A CN201911293525A CN111117421A CN 111117421 A CN111117421 A CN 111117421A CN 201911293525 A CN201911293525 A CN 201911293525A CN 111117421 A CN111117421 A CN 111117421A
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- aerogel composite
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- oil pipe
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- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000004964 aerogel Substances 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000011521 glass Substances 0.000 claims abstract description 19
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 239000003607 modifier Substances 0.000 claims abstract description 17
- 239000011324 bead Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003822 epoxy resin Substances 0.000 claims abstract description 10
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 28
- 239000011259 mixed solution Substances 0.000 claims description 25
- 239000003921 oil Substances 0.000 claims description 20
- 229920002401 polyacrylamide Polymers 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 235000012239 silicon dioxide Nutrition 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 11
- MOBNLCPBAMKACS-UHFFFAOYSA-N 2-(1-chloroethyl)oxirane Chemical compound CC(Cl)C1CO1 MOBNLCPBAMKACS-UHFFFAOYSA-N 0.000 claims description 10
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 10
- 239000001488 sodium phosphate Substances 0.000 claims description 10
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 10
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 7
- LSRPARCOXAUYNP-UHFFFAOYSA-N cyclohexylidene(oxido)oxidanium Chemical compound [O-][O+]=C1CCCCC1 LSRPARCOXAUYNP-UHFFFAOYSA-N 0.000 claims description 5
- -1 polysiloxane Polymers 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920006243 acrylic copolymer Polymers 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004965 Silica aerogel Substances 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 2
- 229920002313 fluoropolymer Polymers 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims 3
- 229920005573 silicon-containing polymer Polymers 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 6
- 230000008021 deposition Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000000741 silica gel Substances 0.000 abstract description 2
- 229910002027 silica gel Inorganic materials 0.000 abstract description 2
- 239000000499 gel Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 239000003129 oil well Substances 0.000 description 6
- 239000004005 microsphere Substances 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 150000003376 silicon Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical group CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007783 nanoporous material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001558 organosilicon polymer Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
-
- 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
- C09D7/47—Levelling agents
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/02—Applying the material on the exterior of the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an aerogel composite coating and application thereof in an underground oil pipe, and belongs to the technical field of oil extraction in oil fields. The aerogel composite coating comprises 10 parts of silica gel powder, 50-100 parts of water-based epoxy resin, 10-20 parts of hollow glass beads, 5-10 parts of a surface modifier, 3-5 parts of a film-forming assistant, 0.1-1.0 part of a leveling agent and 1-2 parts of a defoaming agent; the aerogel composite coating has high uniformity and good moldability, can be coated outside an oil pipe, has strong adhesive force, can adapt to the underground oil-water environment for a long time, has outstanding heat preservation performance, and can obviously reduce the wax deposition phenomenon of the oil pipe.
Description
Technical Field
The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to an aerogel composite coating and application thereof in an underground oil pipe.
Background
The oil well generally has the phenomenon of wax deposition, and the wax deposition can block an oil outlet channel, increase the wellhead back pressure, reduce the oil well yield, and can also increase the oil well load simultaneously. In order to keep the normal production of an oil well, the wax removal and prevention method mainly adopts the modes of adding a wax removal agent, hot washing and the like at present, and the method has high cost.
The silicon dioxide aerogel has nanometer pores, is a porous solid material, has the structural characteristics of low density and high porosity, and has super heat insulation performance. The coating with super heat-insulating property is formed by combining the silicon dioxide aerogel, the hollow glass beads and the film-forming material for the coating. The existing aerogel coating has the problems of easy moisture absorption and water cracking, and the underground oil pipe is in long-term contact with oil and water, so that the product is not suitable for use, and the existing aerogel coating has poor heat insulation property and cannot meet the high-efficiency heat insulation requirement of oil well produced liquid.
Disclosure of Invention
The invention aims to solve the problems that the existing aerogel coating is easy to absorb moisture and crack when meeting water, and provides an aerogel composite coating and application thereof in an underground oil pipe.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the aerogel composite coating comprises the following components in parts by weight:
10 parts of silicon dioxide gel powder, 50-100 parts of water-based epoxy resin, 10-20 parts of hollow glass beads, 5-10 parts of surface modifier, 3-5 parts of film-forming assistant, 0.1-1.0 part of flatting agent and 1-2 parts of defoaming agent;
the surface modifier is prepared by the following preparation method, and the preparation method specifically comprises the following steps:
1) adding a surface active monomer and sodium phosphate into a polyacrylamide aqueous solution to obtain a mixed solution A;
wherein the concentration of the polyacrylamide aqueous solution is 55%, and the mass ratio of the surface active monomer, the polyacrylamide and the sodium phosphate in the mixed solution A is 1: 20: 0.2;
2) adjusting the pH value of the mixed solution A to 8-10, and deoxidizing;
3) feeding the deoxidized mixed solution A into a reaction kettle, heating to 40 ℃ within 30min, adding cyclohexanone oxide, and reacting at 50 ℃ for 3 h;
wherein the mass ratio of the mixed solution A to the oxidized cyclohexanone is 1: 0.05;
4) after the reaction in the step 3) is finished, adding methyl epichlorohydrin, then heating to 50 ℃, preserving heat for 4 hours for reaction, and obtaining a surface modifier after the reaction is finished;
wherein the mass ratio of the methyl epichlorohydrin to the polyacrylamide aqueous solution is 1: 0.01.
furthermore, the particle size of the silicon dioxide aerogel powder is 1-20 mu m, and the pore diameter of the aerogel is 10-15 nm.
Furthermore, the particle size of the hollow glass beads is 100-150 μm, and the inner diameter is 80-130 μm.
Further, the film-forming assistant is ethylene glycol butyl ether, propylene glycol methyl ether acetate or dodecyl alcohol ester.
Further, the defoaming agent is a polyether modified silicon defoaming agent, a polysiloxane defoaming agent or higher alcohol.
Further, the flatting agent is polyurethane, organic silicon, fluorocarbon or acrylic copolymer flatting agent.
The aerogel composite coating is applied to the underground oil pipe.
The application of the aerogel composite coating in the underground oil pipe comprises the following steps:
1) coating the anti-corrosion epoxy resin on the wall of the oil pipe to be used as primer;
2) when the primer is semi-cured, coating the aerogel composite coating on the primer to serve as an intermediate layer;
3) and after the intermediate layer is cured, coating the waterproof epoxy resin on the intermediate layer to serve as finish paint.
Further, the thickness of the primer is 2-4 mm; the coating layers of the middle layer are 2-4 layers, and the total thickness is 2-4 mm; the thickness of the finish paint is 0.5-1 mm.
Compared with the prior art, the invention has the following beneficial effects:
according to the aerogel composite coating, in the aspect of processing on the formula, the heat insulation performance of the coating is determined by the type and the content of the porous filler in the coating, the higher the content of the porous filler (such as aerogel, hollow glass beads, glass fibers and the like), the better the heat insulation performance of the coating is, however, when the content of aerogel particles is increased to a certain degree, the toughness of the coating is reduced, the coating is easy to crack and is not suitable for being coated on the surface of a continuous telescopic structure of an underground oil pipe, in order to further increase the toughness and the heat insulation performance of the coating, the aerogel particles and the hollow glass beads are compounded, the better heat insulation performance, impact resistance and bending stress resistance of a spherical hollow glass bead are utilized, the toughness of an aerogel composite coating film can be well improved, and the heat insulation performance of the coating is further increased through compounding; the aerogel composite coating has high uniformity and good moldability, can be coated outside an oil pipe, has strong adhesive force, can adapt to the underground oil-water environment for a long time, has outstanding heat preservation performance, and can obviously reduce the wax deposition phenomenon of the oil pipe; the silica gel powder is SiO2The nano porous material which is formed by taking colloid particles as a framework, has high specific surface area, high porosity, low density (only 3 times of air), extremely low thermal conductivity, flame retardance and water resistance; the interior of the hollow glass bead is close to vacuum, the heat conductivity coefficient is 0.05-0.09W/m.k, the spherical structure of the particles has good dispersion effect on impact force and bending stress, the toughness of the coating film can be well improved, and the coating film is light in weight, hard and high in compressive strength; the surface modifier can effectively improve the surface tension, temperature resistance, salt resistance and film forming property of the silicon dioxide aerogel, has extremely strong hydrophobicity, can effectively improve the problems of moisture absorption and cracking of the silicon aerogel, and is simple in preparation process, free of pollutant output, safe and environment-friendly; the film-forming assistant can promote the plastic flow and elastic deformation of the high molecular compound, improve the coalescence performance and form a film in a wider construction temperature range; the addition of the defoaming agent can directly destroy large bubbles on an air interface and avoid the large bubbles from being trapped by most air; the leveling agent enables the obtained heat-insulating coating to form a flat and smooth coating in the drying film-forming process,And (3) coating the film uniformly.
Furthermore, the particle size of the silicon dioxide particles is 1-20 mu m, the pore diameter is 10-15 nm, the heat conductivity coefficient is 0.015W/m.k, and the hydrophobic silicon dioxide gel powder has higher heat preservation performance in the water-soluble coating.
Furthermore, the particle size of the hollow glass microspheres is 100-150 microns, the inner diameter is 80-130 microns, in the aspect of optimizing the particle size of the hollow glass microspheres, aerogel powder with the particle size of small particle size is gathered and filled in gaps of the hollow glass microspheres with the large particle size according to the particle accumulation theory, a close accumulation structure can be formed, the heat preservation performance of the coating is further improved, silica aerogel powder with the particle size of 20 microns is calculated according to a Lasiobo model, the particle size of the hollow microspheres with the particle size of 100-150 microns can achieve a complete close packing effect, and therefore the highest heat conductivity coefficient is obtained.
Furthermore, the defoaming agent is preferably a polyether modified silicon defoaming agent, and has the advantages of higher defoaming speed, longer foam inhibition time and wider applicable medium range.
Furthermore, the leveling agent is preferably polyurethane, and the polyurethane leveling agent has excellent leveling property and thickening property, is suitable for emulsion coating, can endow rheological property similar to Newtonian fluid, hardly influences the color development of the coating, has small influence on the heat conductivity coefficient of the coating, and can improve the leveling property of the coating.
The aerogel composite coating disclosed by the invention has strong waterproof and moisture-resistant performances when being applied to an underground oil pipe, has strong adhesive force when being coated outside the oil pipe, can adapt to an underground oil-water environment for a long time, has outstanding heat-insulating performance, can obviously reduce the wax deposition phenomenon of the oil pipe, and is free of volatile matters, non-toxic and harmless; the heat conductivity coefficient is small, and the heat preservation effect is good.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The aerogel composite coating with the ultralow heat conductivity coefficient is adopted, and the aerogel composite coating is coated on the wall of the oil pipe to effectively preserve heat of produced liquid, so that other wax removal and prevention measures and later maintenance are greatly reduced, and a new way is provided for oil well wax prevention and ground gathering and transportation pipeline heat preservation.
Example 1
The aerogel composite coating comprises the following components in parts by weight:
10 parts of silicon dioxide gel powder, 50 parts of water-based epoxy resin, 10 parts of hollow glass beads, 5 parts of surface modifier, 3 parts of film-forming assistant, 0.1 part of flatting agent and 1 part of defoaming agent;
the surface modifier is prepared by the following preparation method, and the preparation method specifically comprises the following steps:
1) adding a surface active monomer and sodium phosphate into a polyacrylamide aqueous solution to obtain a mixed solution A;
wherein the concentration of the polyacrylamide aqueous solution is 55%, and the mass ratio of the surface active monomer, the polyacrylamide and the sodium phosphate in the mixed solution A is 1: 20: 0.2;
2) adjusting the pH value of the mixed solution A to 8, and deoxidizing;
3) feeding the deoxidized mixed solution A into a reaction kettle, heating to 40 ℃ within 30min, adding cyclohexanone oxide, and reacting at 50 ℃ for 3 h;
wherein the mass ratio of the mixed solution A to the oxidized cyclohexanone is 1: 0.05;
4) after the reaction in the step 3) is finished, adding methyl epichlorohydrin, then heating to 50 ℃, preserving the heat for 4 hours, stirring, and after the reaction is finished, obtaining the surface modifier;
wherein the mass ratio of the methyl epichlorohydrin to the polyacrylamide aqueous solution is 1: 0.01.
wherein the particle size of the silicon dioxide particles in the silicon dioxide gel powder is 15-20 μm, and the pore diameter is 10-15 nm; the particle size of the hollow glass beads is 100 microns, and the inner diameter is 80 microns; the film forming auxiliary agent is ethylene glycol butyl ether; the defoaming agent is a polyether modified silicon defoaming agent; the flatting agent is polyurethane.
Example 2
The aerogel composite coating comprises the following components in parts by weight:
10 parts of silicon dioxide gel powder, 100 parts of water-based epoxy resin, 20 parts of hollow glass beads, 10 parts of surface modifier, 5 parts of film-forming assistant, 1.0 part of flatting agent and 2 parts of defoaming agent;
the surface modifier is prepared by the following preparation method, and the preparation method specifically comprises the following steps:
1) adding a surface active monomer and sodium phosphate into a polyacrylamide aqueous solution to obtain a mixed solution A;
wherein the concentration of the polyacrylamide aqueous solution is 55%, and the mass ratio of the surface active monomer, the polyacrylamide and the sodium phosphate in the mixed solution A is 1: 20: 0.2;
2) adjusting the pH value of the mixed solution A to 10, and deoxidizing;
3) feeding the deoxidized mixed solution A into a reaction kettle, heating to 40 ℃ within 30min, adding cyclohexanone oxide, and reacting at 50 ℃ for 3 h;
wherein the mass ratio of the mixed solution A to the oxidized cyclohexanone is 1: 0.05;
4) after the reaction in the step 3) is finished, adding methyl epichlorohydrin, then heating to 50 ℃, preserving the heat for 4 hours, stirring, and after the reaction is finished, obtaining the surface modifier;
wherein the mass ratio of the methyl epichlorohydrin to the polyacrylamide aqueous solution is 1: 0.01.
wherein the particle size of the silicon dioxide particles in the silicon dioxide gel powder is 1-10 mu m, and the pore diameter is 10-15 nm; the particle size of the hollow glass beads is 150 μm, and the inner diameter is 130 μm; the film-forming auxiliary agent is propylene glycol butyl ether; the defoaming agent is high-carbon alcohol; leveling agent acrylic copolymer leveling agent.
Example 3
The aerogel composite coating comprises the following components in parts by weight:
10 parts of silicon dioxide gel powder, 80 parts of water-based epoxy resin, 15 parts of hollow glass beads, 8 parts of surface modifier, 4 parts of film-forming assistant, 0.5 part of flatting agent and 1.5 parts of defoaming agent;
the surface modifier is prepared by the following preparation method, and the preparation method specifically comprises the following steps:
1) adding a surface active monomer and sodium phosphate into a polyacrylamide aqueous solution to obtain a mixed solution A;
wherein the concentration of the polyacrylamide aqueous solution is 55%, and the mass ratio of the surface active monomer, the polyacrylamide and the sodium phosphate in the mixed solution A is 1: 20: 0.2;
2) adjusting the pH value of the mixed solution A to 9, and deoxidizing;
3) feeding the deoxidized mixed solution A into a reaction kettle, heating to 40 ℃ within 30min, adding cyclohexanone oxide, and reacting at 50 ℃ for 3 h;
wherein the mass ratio of the mixed solution A to the oxidized cyclohexanone is 1: 0.05;
4) after the reaction in the step 3) is finished, adding methyl epichlorohydrin, then heating to 50 ℃, preserving the heat for 4 hours, stirring, and after the reaction is finished, obtaining the surface modifier;
wherein the mass ratio of the methyl epichlorohydrin to the polyacrylamide aqueous solution is 1: 0.01; the particle size of the silicon dioxide particles in the silicon dioxide gel powder is 10-20 mu m, and the pore diameter is 10-15 nm; (ii) a The particle size of the hollow glass beads is 120 microns, and the inner diameter is 100 microns; the film-forming auxiliary agent is propylene glycol methyl ether acetate; the defoaming agent is a polysiloxane defoaming agent; the leveling agent is organic silicon.
Example 4
The other conditions were the same as in example 1 except that the coalescing agent was replaced with lauryl alcohol ester and the coalescing agent was replaced with fluorocarbon.
The aerogel composite coating obtained in example 1 has the following modified silica gel hydrophobicity changes: the contact angle of the aerogel is increased from 135 degrees before modification to 140 degrees through a contact angle tester at normal temperature, and the good hydrophobicity of the nano aerogel is shown. Table 1 shows the performance parameters of example 1, and it can be seen from Table 1 that the aerogel composite coating has strong adhesion, high temperature resistance and corrosion resistance.
Table 1 performance parameters of the aerogel composite coating of example 1
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. The aerogel composite coating is characterized by comprising the following components in parts by weight:
10 parts of silicon dioxide gel powder, 50-100 parts of water-based epoxy resin, 10-20 parts of hollow glass beads, 5-10 parts of surface modifier, 3-5 parts of film-forming assistant, 0.1-1.0 part of flatting agent and 1-2 parts of defoaming agent;
the surface modifier is prepared by the following preparation method, and the preparation method specifically comprises the following steps:
1) adding a surface active monomer and sodium phosphate into a polyacrylamide aqueous solution to obtain a mixed solution A;
wherein the concentration of the polyacrylamide aqueous solution is 55%, and the mass ratio of the surface active monomer, the polyacrylamide and the sodium phosphate in the mixed solution A is 1: 20: 0.2;
2) adjusting the pH value of the mixed solution A to 8-10, and deoxidizing;
3) feeding the deoxidized mixed solution A into a reaction kettle, heating to 40 ℃ within 30min, adding cyclohexanone oxide, and reacting at 50 ℃ for 3 h;
wherein the mass ratio of the mixed solution A to the oxidized cyclohexanone is 1: 0.05;
4) after the reaction in the step 3) is finished, adding methyl epichlorohydrin, then heating to 50 ℃, preserving heat for 4 hours for reaction, and obtaining a surface modifier after the reaction is finished;
wherein the mass ratio of the methyl epichlorohydrin to the polyacrylamide aqueous solution is 1: 0.01.
2. the aerogel composite coating according to claim 1, wherein the particle size of the silica aerogel powder is 1-20 μm, and the pore size of the gel is 10-15 nm.
3. The aerogel composite coating according to claim 1, wherein the hollow glass beads have a particle size of 100 to 150 μm and an inner diameter of 80 to 130 μm.
4. The aerogel composite coating of claim 1, wherein the film forming aid is ethylene glycol butyl ether, propylene glycol methyl ether acetate, or lauryl alcohol.
5. The aerogel composite coating of claim 1, wherein the defoamer is a polyether modified silicon defoamer, a polysiloxane defoamer, or a higher alcohol.
6. The aerogel composite coating of claim 1, wherein the leveling agent is a polyurethane, silicone, fluorocarbon, or acrylic copolymer leveling agent.
7. Use of an aerogel composite coating based on any of claims 1-6 in a downhole tubing.
8. The use of the aerogel composite coating of claim 7 in a downhole tubing, comprising the steps of:
1) coating the anti-corrosion epoxy resin on the wall of the oil pipe to be used as primer;
2) when the primer is semi-cured, coating the aerogel composite coating on the primer to serve as an intermediate layer;
3) and after the intermediate layer is cured, coating the waterproof epoxy resin on the intermediate layer to serve as finish paint.
9. The application of the aerogel composite coating to a downhole oil pipe according to claim 8, wherein the thickness of the primer is 2-4 mm; the coating layers of the middle layer are 2-4 layers, and the total thickness is 2-4 mm; the thickness of the finish paint is 0.5-1 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113913047A (en) * | 2021-11-16 | 2022-01-11 | 无锡市明江保温材料有限公司 | Novel aerogel hollow glass bead reflective coating and preparation method thereof |
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| CN108410320A (en) * | 2018-04-01 | 2018-08-17 | 中鸿纳米纤维技术丹阳有限公司 | A kind of high heat insulating ability aeroge coating based on silica |
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| CN102367353A (en) * | 2011-10-12 | 2012-03-07 | 上海海隆赛能新材料有限公司 | Low thermal conductivity composite thermal insulation paint and preparation method thereof |
| CN104371506A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气集团公司 | Cathodic disbonding-resistant liquid epoxy coating and its preparation method |
| CN107163831A (en) * | 2017-06-20 | 2017-09-15 | 合肥市淑芹美装饰工程有限公司 | A kind of low thermal conductivity heat insulating coating material for wall and preparation method thereof |
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