CN118580749A - Epoxy resin coating shaft equipment and manufacturing method thereof - Google Patents
Epoxy resin coating shaft equipment and manufacturing method thereof Download PDFInfo
- Publication number
- CN118580749A CN118580749A CN202410971518.3A CN202410971518A CN118580749A CN 118580749 A CN118580749 A CN 118580749A CN 202410971518 A CN202410971518 A CN 202410971518A CN 118580749 A CN118580749 A CN 118580749A
- Authority
- CN
- China
- Prior art keywords
- epoxy resin
- coating
- parts
- fluorosilicone
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 100
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 100
- 238000000576 coating method Methods 0.000 title claims abstract description 70
- 239000011248 coating agent Substances 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 238000005260 corrosion Methods 0.000 claims abstract description 20
- 230000007797 corrosion Effects 0.000 claims abstract description 20
- 230000008021 deposition Effects 0.000 claims abstract description 12
- 150000001412 amines Chemical class 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 56
- 239000011787 zinc oxide Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 26
- 239000004094 surface-active agent Substances 0.000 claims description 21
- 239000003921 oil Substances 0.000 claims description 20
- 239000001993 wax Substances 0.000 claims description 20
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000004697 Polyetherimide Substances 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 15
- 229920001601 polyetherimide Polymers 0.000 claims description 15
- 239000004593 Epoxy Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 230000002829 reductive effect Effects 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000012188 paraffin wax Substances 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical compound [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims description 6
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000003618 dip coating Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229940024548 aluminum oxide Drugs 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 12
- 230000001976 improved effect Effects 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- ZZNQQQWFKKTOSD-UHFFFAOYSA-N diethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OCC)(OCC)C1=CC=CC=C1 ZZNQQQWFKKTOSD-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000003405 preventing effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000004169 Hydrogenated Poly-1-Decene Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019383 crystalline wax Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- -1 amino siloxane Chemical class 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention provides epoxy resin coating shaft equipment and a manufacturing method thereof, and belongs to the field of petroleum exploitation equipment. The epoxy resin coating shaft equipment comprises a casing pipe, wherein a coating containing epoxy resin is arranged on the surface of the casing pipe; the coating containing the epoxy resin consists of modified epoxy resin, an amine curing agent, a corrosion-resistant filler and an anti-wax precipitation agent; the modified epoxy resin is fluorosilicone epoxy resin. The invention can effectively reduce the wax deposition degree of the shaft, reduce the rust and friction of the shaft, improve the oil production efficiency and has practical application value.
Description
Technical Field
The invention belongs to the field of petroleum exploitation equipment, and particularly relates to epoxy resin coating shaft equipment and a manufacturing method thereof.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the exploitation process of an oil well, paraffin in crude oil can cause a well bore paraffin phenomenon, so that the problems of oil pipe channel blockage, oil pump efficiency reduction, oil pumping equipment energy consumption increase, equipment failure rate improvement and the like are caused. Paraffin components in crude oil can be crystallized and separated out under certain conditions (such as temperature reduction), and adhere to the inner wall of a shaft to form a paraffin precipitation phenomenon. Wax precipitation increases the roughness of the inner wall of the wellbore, thereby increasing friction; sediment in the stratum enters the well bore along with the fluid, and a rough surface is formed, so that friction is increased. In addition, crude oil contains a large amount of corrosive substances such as hydrogen sulfide, which accelerate corrosion and rusting of metal equipment such as a well bore. The above reasons have very adverse effects on the production efficiency of the oil well, and the service life of the equipment is reduced, so that the safety cost, the time cost and the economic cost are increased for enterprises.
At present, the wax deposition phenomenon of a shaft is reduced in a physical or chemical mode in the industry, so that the rust resistance and the wear resistance of shaft equipment are improved. For example, creating a high temperature environment to accelerate dissolution of crystalline wax in the well bore of the oil well; the structure similar to a brush is adopted to prevent wax deposition, but the effect is very little, and the pit shaft cannot be prevented from rusting; or the wax remover is used for promoting the ablation of the crystalline wax, but the problems of poor safety and complex operation exist, and the penetration effect on the well with high part of impurities is poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the problems that the conventional shaft equipment is easy to wax and rust and has short service life. The invention provides an epoxy resin coating shaft device and a manufacturing method thereof, wherein the inner wall of the shaft is provided with a coating containing epoxy resin, the epoxy resin coating is formed by using epoxy resin, amine curing agent, corrosion-resistant filler and wax deposition preventing agent, so that the wax deposition degree of a shaft is effectively reduced, the rust and friction of the shaft are reduced, the petroleum production efficiency is improved, and the method has practical application value.
To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
in a first aspect of the invention, an epoxy coated wellbore apparatus is provided comprising a casing 1, the casing 1 having a surface provided with a coating 2 comprising an epoxy resin.
In a specific embodiment of the invention, the coating containing the epoxy resin is composed of modified epoxy resin, an amine curing agent, a corrosion-resistant filler and an anti-wax deposition agent.
In a specific embodiment of the present invention, the modified epoxy resin is a fluorosilicone epoxy resin; to improve the wear resistance and wax deposition resistance of the coating.
In a specific embodiment of the invention, the preparation method of the fluorosilicone epoxy resin comprises the following steps:
Mixing organic siloxane, fluorosilane, absolute ethyl alcohol and distilled water, stirring and refluxing, adjusting the pH value to 4-5 by hydrochloric acid, and refluxing and distilling under reduced pressure to obtain fluorosilicone resin;
Diluting the epoxy resin with isobutanol and butyl acetate, adding the fluorosilicone resin under stirring, and carrying out reflux and reduced pressure distillation to obtain the fluorosilicone resin epoxy resin.
In the specific embodiment of the invention, the amine curing agent is a polyether imide curing agent, so that the mechanical property of the epoxy resin can be further improved, the bending degree and the strength of the epoxy resin are enhanced, and the wear resistance and the chemical stability of the coating are improved.
In particular embodiments of the present invention, the corrosion-resistant filler comprises glass flakes, carbon fibers, graphene, or nano zinc oxide.
In particular embodiments of the present invention, anti-wax deposition agents include fluorinated surfactants, aluminum and sodium hydroxide, oil-based paraffin wax removers, water-based paraffin wax removers, emulsion paraffin wax removers;
preferably a fluorinated surfactant; more preferably Capstone FS-10.
The hydrophobic tail of the fluorinated surfactant is partially fluorinated or completely substituted with a fluorine molecule. Fluorinated surfactants have different properties compared to the corresponding hydrocarbon surfactants, such as lower surface tension, better interfacial tension reducing efficiency, oleophobic and hydrophobic properties, high thermal stability and better chemical resistance, and can be used in fire protection, household products, foaming, coating and paint preparation.
In the specific embodiment of the invention, the addition amounts of the epoxy resin, the amine curing agent, the corrosion-resistant filler and the wax-binding preventing agent are respectively as follows: 100 parts, 40-45 parts, 10-13 parts and 7-10 parts;
Preferably, the epoxy resin, the amine curing agent, the corrosion-resistant filler and the wax-binding preventing agent are respectively added in the following amounts: 100 parts, 42 parts, 10 parts and 8 parts.
In a specific embodiment of the invention, the thickness of the coating is 0.5mm-2mm.
In a second aspect of the present invention, there is provided a method of producing a coating of an epoxy resin, comprising,
S1: preparing 100 parts of fluorosilicone epoxy resin, 40-45 parts of polyether imide curing agent, 10-13 parts of nano zinc oxide and 7-10 parts of fluorinated surfactant;
S2: dissolving nano zinc oxide into ethyl acetate, dripping a fluorinated surfactant while stirring, and uniformly stirring and mixing;
S3: adding the polyether imide curing agent into the fluorosilicone epoxy resin at the temperature of 45-60 ℃, uniformly mixing, and continuously stirring for 10 minutes;
S4: gradually adding a mixture of nano zinc oxide and a fluorinated surfactant into the mixture obtained in the step S3, and stirring for 15 minutes to obtain a coating containing epoxy resin; ultrasonic defoaming;
S5: after removing dirt on the surface of the oil layer sleeve, uniformly coating the coating obtained in the step S4 on the surface of the oil layer sleeve by using a spray coating or dip coating process;
s6: curing at 70-90 deg.c for 2-4 hr and then at 110-130 deg.c for 2-4 hr to form smooth hard protecting layer.
In a specific embodiment of the invention, the method comprises:
S1: preparing 100 parts of fluorosilicone epoxy resin, 42.5 parts of polyether imide curing agent, 10 parts of nano zinc oxide and 7.5 parts of fluorinated surfactant;
S2: dissolving nano zinc oxide into ethyl acetate, dripping a fluorinated surfactant while stirring, and uniformly stirring and mixing;
S3: adding the polyether imide curing agent into the fluorosilicone epoxy resin at the temperature of 45-60 ℃, uniformly mixing, and continuously stirring for 10 minutes;
S4: gradually adding a mixture of nano zinc oxide and a fluorinated surfactant into the mixture obtained in the step S3, and stirring for 15 minutes to obtain a coating containing epoxy resin; ultrasonic defoaming;
S5: after removing dirt on the surface of the oil layer sleeve, uniformly coating the coating obtained in the step S4 on the surface of the oil layer sleeve by using a spray coating or dip coating process;
S6: curing at 80 ℃ for 2-4 hours followed by curing at 125 ℃ for 2-4 hours, forming a smooth and hard protective layer.
The one or more of the above technical solutions have the following beneficial effects:
The invention provides the epoxy resin coating for effectively inhibiting wax deposition and rust of the shaft equipment, and the mechanical property (wear resistance) and corrosion resistance of the shaft equipment are effectively improved through optimizing the coating, so that the rust phenomenon is reduced; the wax deposition phenomenon is effectively prevented, the exploitation efficiency is improved, the service life of shaft equipment is prolonged, and the maintenance cost is reduced.
According to the invention, the nano zinc oxide cooperates with the fluorine-containing surfactant to effectively reduce the problems of brittleness and poor mechanical property caused by epoxy resin curing, and reduce the friction coefficient. Meanwhile, the epoxy resin-containing coating provided by the invention can effectively shorten the initial setting time of the coating, does not influence the mechanical property and corrosion resistance, and has practical application value.
Drawings
FIG. 1 is a schematic view of a wellbore equipment structure and a coating structure according to an embodiment of the present invention.
FIG. 2 shows the results of the corrosion resistance test of the present invention.
Reference numerals: 1. a casing of a conductive layer; 2. an epoxy-containing coating.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention.
In the present invention, diphenyldiethoxysilane, CAS number 2553-19-7, available from microphone.
In the present invention, methyltriethoxysilane, CAS number 2031-67-6, was purchased from microphone.
In the present invention, fluorosilane, CAS number: 420-56-4, available from microphone.
In the present invention, epoxy resin NPEL-128 (technical grade), available from Shanghai power chemical industry Co., ltd.
In the invention, nano zinc oxide, CAS number 1314-13-2, purchased from Allatin, size 50+ -10 nm, product number: z112849; when the size of the nano zinc oxide is 30+/-10 nm, the product number is: z112847.
In the invention, a Capstone FS-10, a trade name and a trade mark: capstone Capstone @ FS-10, commercially available from Jin Teng Dragon chemical, inc.
In the invention, the fluorosilicone epoxy resin is modified epoxy resin. The epoxy resin has excellent cohesiveness, excellent electrical insulation, better mechanical property, good corrosion resistance and chemical resistance, and has wide application in various fields of civil construction, electronics and electricity, coating plastics and the like. However, the porosity and brittleness of the epoxy resin limit its application, resulting in further improvements in mechanical properties, chemical resistance. The invention uses amino siloxane, several siloxane coupling agents and fluorosilane to heat, hydrolyze and condense under a certain pH value condition, and the fluorosilicone resin is produced by reaction. The fluorosilicone resin is used as modifier to modify epoxy resin, and the amino group in the fluorosilicone resin and the epoxy group in the epoxy resin are subjected to ring-opening polymerization reaction to obtain fluorosilicone epoxy resin, so that the adhesive force, hardness, impact resistance, heat resistance, water resistance, weather resistance and the like of a paint film are greatly improved, and the fluorosilicone epoxy resin is more suitable for the requirements of industrial production.
Specifically, the preparation method of the fluorosilicone epoxy resin comprises the following steps: mixing diphenyl diethoxy silane, methyltriethoxy silane, fluorosilane, absolute ethyl alcohol and distilled water, placing the mixture in a reaction kettle, stirring and refluxing the mixture, regulating the pH value to 4-5 by using 30% hydrochloric acid, controlling the refluxing temperature to 60-70 ℃, controlling the refluxing time to 2 hours, and performing reduced pressure distillation (80 ℃ and 0.5 mmhg) after the reaction is finished to obtain fluorosilicone resin, wherein the molar ratio of diphenyl diethoxy silane, methyltriethoxy silane, fluorosilane and absolute ethyl alcohol is 5:3:5:8 diphenyldiethoxysilane 40g was used, the volume of distilled water being twice the volume of the above mixture. Dissolving 10g of epoxy resin by using isobutanol and butyl acetate, adding 1g of fluorosilicone resin under a stirring state, adding 0.1g of KH792 for catalytic reaction, controlling the temperature and time of reflux reaction, controlling the temperature of reflux at 60-70 ℃ and controlling the reflux time at 4h; after the completion of the reaction, distillation under reduced pressure (80 ℃ C., 0.5 mmhg) was carried out to obtain a fluorosilicone epoxy resin.
In the invention, the polyether imide curing agent can interact with the fluorosilicone epoxy resin to form a cross-linked structure so as to promote the coating to be cured; the polyether imide curing agent and the fluorosilicone epoxy resin can also cooperate with nano zinc oxide and a fluorine-containing surfactant to be dispersed into a cross-linked structure, so that the defects caused by the porosity and brittleness of the epoxy resin are overcome, the adhesive force of the epoxy resin-containing coating is further improved, the friction coefficient is reduced, and the wear resistance is improved; the interaction of the three can effectively reduce the solidification time of the coating and save the production cost.
In the invention, the nano zinc oxide is dispersed in the epoxy resin in a physical form and does not react with the epoxy resin chemically, but can improve the chemical corrosion resistance of the epoxy resin coating.
In the invention, the fluorinated surfactant is added into the epoxy resin in a physical form, and can be interacted with the epoxy resin through physical adsorption or chemical bonding to improve the surface property of the coating, reduce the friction coefficient, improve the mechanical property and improve the wax deposition preventing property.
Embodiment one: the embodiment discloses an epoxy resin coating shaft device and a manufacturing method thereof.
As shown in fig. 1, the surface of a wellbore equipment casing 1 is provided with an epoxy-containing coating 2, the casing 1 being 5 inches in diameter.
The preparation method of the coating containing the epoxy resin comprises the following steps:
s1: preparing 1000g, 425g, 100g and 75g of fluorosilicone epoxy resin, polyether imide curing agent, nano zinc oxide and FS-10 respectively;
s2: dissolving nano zinc oxide into ethyl acetate (the dosage is not required to play a role of a solvent) with the same volume, dripping FS-10 while stirring, and uniformly stirring and mixing;
S3: adding a polyether imide curing agent into fluorosilicone epoxy resin at 60 ℃, taking ethyl acetate as a solvent, uniformly mixing, and continuously stirring for 10 minutes;
S4: gradually adding the mixture of nano zinc oxide and FS-10 into the mixture obtained in the step S3, and stirring for about 15 minutes to obtain the coating containing the epoxy resin; to prevent bubble generation, the above materials are treated by ultrasonic method, and ultrasonic conditions are as follows: 800W, frequency 22kHz for 60min;
S5: removing dirt such as greasy dirt, rust, corrosion and the like on the inner wall of the oil layer sleeve 1 by adopting steel grit injection; drying the shaft sleeve to ensure the drying of the inner wall of the shaft;
s6: uniformly coating the mixed coating on the surface of the oil layer sleeve by using a spray coating or dip coating process for 1mm;
S7: curing at 80 ℃ for 3 hours followed by curing at 125 ℃ for 2 hours forms a smooth, hard protective layer.
The infrared spectrogram measurement shows that the fluorosilicone epoxy resin has a C-F telescopic vibration peak at 1255cm < -1 >, and is strongly absorbed; the stretching vibration of the unsaturated bond c=c in the benzene ring appears at 1450 cm-1; the absorption peak of the si-O group is shown at 1093 cm-1; 823 The absorption peak of Si-C at cm-1 indicates that the epoxy resin has been successfully modified.
Embodiment two: the difference from the first example is that the fluorosilicone epoxy resin, the polyether imide curing agent, the nano zinc oxide and the fluorinated surfactant are 1000g, 400g, 130g and 80g respectively.
Comparative example one: the difference from example one is that epoxy NPEL-128 is used.
Comparative example two: the difference from example one is that the fluorinated surfactant FS-10 was not used.
Comparative example three: the difference from comparative example one is that the hatching surfactant FS-10 was not used.
Comparative example four: the difference from comparative example one is that the size of the nano zinc oxide is 30.+ -.10 nm.
To demonstrate the improved effect of the epoxy-containing coating on the wellbore apparatus described above, the epoxy-containing coating was applied to a steel pipe that was in communication with the inner wall material of the casing 1. And then, adopting a salt spray experiment to verify the protection effect of the coating on the inner wall of the oil layer sleeve 1, and testing the mechanical property of the oil layer sleeve.
After the same volume of steel pipe is treated under the same conditions, one group is used as a control without spraying any coating, the second group is used for spraying the coating containing epoxy resin in the first embodiment, the third group is used for spraying the coating containing epoxy resin in the second embodiment, the fourth group is used for spraying the coating containing epoxy resin in the first comparative embodiment, and the fifth group is used for spraying the coating containing epoxy resin in the second comparative embodiment. Six sets of epoxy-containing coatings of comparative example three were sprayed. Seven sets of coatings containing epoxy resin in comparative example four were sprayed.
Salt spray experiment Standard refers to GB/T10125-2012 salt spray test for artificial atmosphere corrosion test. The samples are placed in a salt spray test box, so that the samples are ensured not to be contacted with each other and keep a certain distance from the wall of the box. The temperature of the test chamber is controlled at 35+/-2 ℃ and the humidity is close to 100%. The weight change was counted after 5 days.
Friction coefficient test: and water is used as a medium, an MFT-5000 type friction and wear tester is adopted, the loading force is 80N, the rotating speed is 800rpm/min, and the testing time is 20min. And (3) carrying out abrasion loss test by taking water as a medium, adopting an MFT-5000 type friction abrasion tester, wherein the loading force is 80N, the rotating speed is 800rpm/min, the test time is 20min, and the weight of the weight loss is taken as the abrasion loss.
Further, to verify the protective effect of the coating on the wellbore equipment, the seven groups of mechanical properties described above were also verified.
As a result, it was found that the modified epoxy coating was effective in protecting the equipment itself, improving the corrosion resistance of wellbore equipment (fig. 2), and that there was no significant difference in corrosion resistance performance from the change in nano-zinc oxide or the absence of fluorinated surfactants.
Compared with a pure epoxy resin coating, the fluorosilicone epoxy resin coating is more wear-resistant and has a smaller friction coefficient. It can be found by comparison that the friction coefficient can be effectively reduced no matter the fluorosilicone epoxy resin or the epoxy resin is added with zinc oxide and FS-10 at the same time, and the zinc oxide and the FS-10 act synergistically, so that the flexibility of the cured epoxy resin is improved after the curing agent and the epoxy resin are crosslinked.
Compared with pure epoxy resin coating, the steel coated by the fluorosilicone epoxy resin has higher mechanical property (hardness and tensile strength). The introduction of the fluorosilicone resin into the epoxy resin coating is beneficial to improving the tensile strength from 480.05MPa to 630.82MPa, which is 31 percent higher than that of the pure epoxy resin coating. It has also been found that the particle size of the zinc oxide has an effect on improving the adhesion of the coating, but is not subsequently used in view of its effect on the coefficient of friction and tensile strength.
The mechanical property test results (table 1) show that the fluorosilicone epoxy resin coating in the first embodiment has good adhesion and mechanical properties.
Table 1: mechanical property test results
In the spraying process, the initial setting time of two groups and three groups is only 20min, and the initial setting time of other groups is more than 30min.
The wellbore equipment of the first, comparative examples one and comparative examples two of the present invention was used for oil recovery operations.
During the use period, the surface of the oil well casing 1 is dewaxed every 1 month, and the first example is found to have the least paraffin precipitation, the second example is found to have the most serious paraffin precipitation because the paraffin melting effect cannot be achieved without using the fluorinated surfactant.
In addition, the annual production was counted and it was found that the average oil production after use of the fluorosilicone epoxy coated wellbore equipment of example one was increased by a factor of 0.20, and the average oil production after use of the wellbore equipment of comparative examples one and two was increased by a factor of 0.13 and 0.11.
In terms of service life, the well bore equipment in the second comparative example starts to be corroded and damaged after 12 months of production operation, the well bore equipment in the first comparative example starts to be corroded and damaged after 14 months of production operation, and the well bore equipment in the first example starts to be corroded and damaged after 18 months of production operation, so that the service life is effectively prolonged.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (9)
1. An epoxy resin coated wellbore equipment, characterized by comprising a casing (1), the casing surface being provided with a coating (2) comprising epoxy resin;
The coating containing the epoxy resin consists of modified epoxy resin, an amine curing agent, a corrosion-resistant filler and an anti-wax precipitation agent;
The modified epoxy resin is fluorosilicone epoxy resin.
2. The epoxy coated wellbore apparatus of claim 1, wherein the amine-based curing agent is a polyetherimide curing agent;
the corrosion-resistant filler comprises glass flakes, carbon fibers, graphene or nano zinc oxide;
The anti-wax deposition agent comprises a fluorinated surfactant, aluminum and sodium hydroxide, an oil-based paraffin remover, a water-based paraffin remover and an emulsion paraffin remover.
3. The epoxy coated wellbore apparatus of claim 1 wherein the anti-caking wax is a fluorinated surfactant.
4. The epoxy coated wellbore apparatus of claim 2, wherein the fluorosilicone epoxy is prepared by a process comprising:
Mixing organic siloxane, fluorosilane, absolute ethyl alcohol and distilled water, stirring and refluxing, adjusting the pH value to 4-5 by hydrochloric acid, and refluxing and distilling under reduced pressure to obtain fluorosilicone resin;
diluting the epoxy resin with isobutanol and butyl acetate, adding the fluorosilicone resin under stirring, refluxing, and distilling under reduced pressure to obtain the fluorosilicone resin epoxy resin.
5. The epoxy resin coated wellbore apparatus of claim 1, wherein the epoxy resin, amine curing agent, corrosion-resistant filler, and anti-caking wax are added in the following amounts by weight: 100 parts, 40-45 parts, 10-13 parts and 7-10 parts.
6. The epoxy coated wellbore apparatus of claim 5, wherein the epoxy resin, amine curing agent, corrosion-resistant filler, and anti-caking wax are added in the following amounts by weight: 100 parts, 42 parts, 10 parts and 8 parts.
7. The epoxy coated wellbore apparatus of claim 2, wherein the coating has a thickness of 0.5mm to 2mm.
8. A method for preparing an epoxy resin coating is characterized by comprising the following steps of,
S1: preparing 100 parts of fluorosilicone epoxy resin, 10-13 parts of polyether imide curing agent, 7-10 parts of nano zinc oxide and FS-10 respectively;
s2: dissolving nano zinc oxide into ethyl acetate, dripping FS-10 while stirring, and uniformly stirring and mixing;
S3: adding the polyether imide curing agent into the fluorosilicone epoxy resin at the temperature of 45-60 ℃, uniformly mixing, and continuously stirring for 10 minutes;
S4: gradually adding the mixture of nano zinc oxide and FS-10 into the mixture obtained in the step S3, and stirring for 15 minutes to obtain the coating containing epoxy resin; ultrasonic defoaming;
S5: after removing dirt on the surface of the oil layer sleeve, uniformly coating the coating obtained in the step S4 on the surface of the oil layer sleeve by using a spray coating or dip coating process;
s6: curing at 70-90 deg.c for 2-4 hr and then at 110-130 deg.c for 2-4 hr to form smooth hard protecting layer.
9. A method of producing an epoxy resin coating according to claim 8, comprising,
S1: preparing 100 parts of fluorosilicone epoxy resin, 42.5 parts of polyether imide curing agent, 10 parts of nano zinc oxide and 7.5 parts of FS-10 respectively;
s2: dissolving nano zinc oxide into ethyl acetate, dripping FS-10 while stirring, and uniformly stirring and mixing;
S3: adding the polyether imide curing agent into the fluorosilicone epoxy resin at the temperature of 45-60 ℃, uniformly mixing, and continuously stirring for 10 minutes;
S4: gradually adding the mixture of nano zinc oxide and FS-10 into the mixture obtained in the step S3, and stirring for 15 minutes to obtain the coating containing epoxy resin; ultrasonic defoaming;
S5: after removing dirt on the surface of the oil layer sleeve, uniformly coating the coating obtained in the step S4 on the surface of the oil layer sleeve by using a spray coating or dip coating process;
S6: curing at 80 ℃ for 2-4 hours followed by curing at 125 ℃ for 2-4 hours, forming a smooth and hard protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410971518.3A CN118580749B (en) | 2024-07-19 | 2024-07-19 | Epoxy resin coating shaft equipment and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410971518.3A CN118580749B (en) | 2024-07-19 | 2024-07-19 | Epoxy resin coating shaft equipment and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118580749A true CN118580749A (en) | 2024-09-03 |
| CN118580749B CN118580749B (en) | 2024-11-08 |
Family
ID=92538177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410971518.3A Active CN118580749B (en) | 2024-07-19 | 2024-07-19 | Epoxy resin coating shaft equipment and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118580749B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4236545A (en) * | 1977-12-30 | 1980-12-02 | Hercules Incorporated | Use of radiation-induced polymers as friction reducing agents |
| CN106554500A (en) * | 2016-11-25 | 2017-04-05 | 郑泽 | A kind of hydrophobically modified epoxy resin and preparation method thereof |
| CN109423207A (en) * | 2017-07-18 | 2019-03-05 | 北京泽马新技术有限公司 | Environmentally friendly transparent anti-corrosion Wax deposition resistant coating and preparation method |
| CN110105842A (en) * | 2019-04-23 | 2019-08-09 | 天津翔盛新材料有限公司 | A kind of dedicated drag reduction wax control powdery paints of crude oil pipeline and application |
| CN113861956A (en) * | 2021-10-20 | 2021-12-31 | 中国石油化工股份有限公司 | Nano drag reducer for oil well and preparation method thereof |
| CN117025047A (en) * | 2023-06-30 | 2023-11-10 | 广东粤港澳大湾区黄埔材料研究院 | Super hydrophilic-oleophobic coating composition, coating, method of making, and coated article |
-
2024
- 2024-07-19 CN CN202410971518.3A patent/CN118580749B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4236545A (en) * | 1977-12-30 | 1980-12-02 | Hercules Incorporated | Use of radiation-induced polymers as friction reducing agents |
| CN106554500A (en) * | 2016-11-25 | 2017-04-05 | 郑泽 | A kind of hydrophobically modified epoxy resin and preparation method thereof |
| CN109423207A (en) * | 2017-07-18 | 2019-03-05 | 北京泽马新技术有限公司 | Environmentally friendly transparent anti-corrosion Wax deposition resistant coating and preparation method |
| CN110105842A (en) * | 2019-04-23 | 2019-08-09 | 天津翔盛新材料有限公司 | A kind of dedicated drag reduction wax control powdery paints of crude oil pipeline and application |
| CN113861956A (en) * | 2021-10-20 | 2021-12-31 | 中国石油化工股份有限公司 | Nano drag reducer for oil well and preparation method thereof |
| CN117025047A (en) * | 2023-06-30 | 2023-11-10 | 广东粤港澳大湾区黄埔材料研究院 | Super hydrophilic-oleophobic coating composition, coating, method of making, and coated article |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118580749B (en) | 2024-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101899257B (en) | Heavy corrosion resistant, heat insulating and static conductive coating | |
| CN105238207A (en) | High performance super-amphiphobic conductive multi-functional corrosion-resistant coating and preparation method thereof | |
| CN110317522B (en) | Solvent-free epoxy coating, preparation method thereof and application thereof in corrosion prevention in oil and gas pipelines | |
| CN111205746B (en) | Solvent-free oil pipeline anticorrosion and drag reduction special coating and preparation method thereof | |
| CN104212206A (en) | Tetraethylorthosilicate inorganic high-temperature-resistant coating and preparation method thereof | |
| CN101555379A (en) | Epoxy nano composite anticorrosion coating for low surface treatment and preparation method thereof | |
| CN108610847B (en) | Graphene rust curing coating with high salt spray resistance and preparation method thereof | |
| CN112194916A (en) | Water-based silica sol gel inorganic zinc-rich primer and preparation method thereof | |
| CN118580749B (en) | Epoxy resin coating shaft equipment and manufacturing method thereof | |
| CN113278345A (en) | Composite coating material | |
| CN110724435B (en) | Drag-reducing epoxy coating in water-based pipeline and preparation method, anticorrosive coating and application thereof | |
| CN103709901A (en) | Nanometer solvent-free epoxy antirust paint and preparation method thereof | |
| CN112143326B (en) | Composition for use as a corrosion protection coating, method for the production thereof and component | |
| CN109988442A (en) | Graphene aqueous silicic acid spelter coating, its application and corrosion-inhibiting coating | |
| CN115181484A (en) | Underwater construction in-situ curing antifouling paint and preparation method and application thereof | |
| CN113881292A (en) | Anti-permeability anticorrosive paint with good stability and strong adhesiveness and preparation method thereof | |
| CN113025165A (en) | Solvent-free epoxy heavy-duty anticorrosive paint and preparation method and application thereof | |
| CN115820091B (en) | Preparation of GO-PDA-CeO 2 Method for preparing PU wear-resistant super-hydrophobic long-acting anti-corrosion coating | |
| CN1560155A (en) | Nano anticorrosion coat of silicon phenolate paint and preparation process thereof | |
| CN115011213A (en) | Solvent-free heavy-duty anticorrosive paint capable of being coated with water and rust and preparation method thereof | |
| CN115751006A (en) | Process for eliminating corrosion under heat-insulating layer | |
| CN110452589B (en) | Graphene coating agent and preparation method thereof | |
| CN113652131A (en) | Water-based acrylic primer-topcoat integrated coating suitable for rusty steel structure and steel structure renovation coating, and preparation method and application method thereof | |
| CN101643610A (en) | Internal antiscale coating for oil well tubes and gathering pipelines in ASP-combinational flooding oil recovery | |
| CN112143298A (en) | Composition for use as a corrosion protection coating, method for the production thereof and component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |