CN114437579A - Composite coating and composition for soluble sliding sleeve ball seat - Google Patents
Composite coating and composition for soluble sliding sleeve ball seat Download PDFInfo
- Publication number
- CN114437579A CN114437579A CN202011106567.9A CN202011106567A CN114437579A CN 114437579 A CN114437579 A CN 114437579A CN 202011106567 A CN202011106567 A CN 202011106567A CN 114437579 A CN114437579 A CN 114437579A
- Authority
- CN
- China
- Prior art keywords
- layer
- composite coating
- coating
- spraying
- wear
- 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.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 92
- 239000011248 coating agent Substances 0.000 title claims abstract description 87
- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000000203 mixture Substances 0.000 title claims description 9
- 238000005507 spraying Methods 0.000 claims description 43
- 239000002245 particle Substances 0.000 claims description 42
- -1 polytetrafluoroethylene Polymers 0.000 claims description 36
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 35
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 35
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 32
- 229920002530 polyetherether ketone Polymers 0.000 claims description 32
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 229910004014 SiF4 Inorganic materials 0.000 claims description 12
- 230000007797 corrosion Effects 0.000 claims description 12
- 229910052909 inorganic silicate Inorganic materials 0.000 claims description 12
- 239000010954 inorganic particle Substances 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 238000007590 electrostatic spraying Methods 0.000 claims description 8
- 238000010285 flame spraying Methods 0.000 claims description 8
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 8
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 229910009043 WC-Co Inorganic materials 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 89
- 238000010438 heat treatment Methods 0.000 description 18
- 239000000843 powder Substances 0.000 description 17
- 238000003756 stirring Methods 0.000 description 10
- 238000009210 therapy by ultrasound Methods 0.000 description 10
- 230000003628 erosive effect Effects 0.000 description 9
- 238000001914 filtration Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- 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
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- 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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/22—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a composite coating suitable for a soluble sliding sleeve ball seat.
Description
Technical Field
The invention provides a composite coating and a composition, in particular to a composite coating and a composition which can be used for a soluble sliding sleeve ball seat.
Background
The multistage sliding sleeve staged fracturing technology for the horizontal well is an effective technical means for increasing the yield of a compact low-permeability reservoir, a conventional sliding sleeve needs to be drilled out through a lower tubular column after fracturing construction is completed to achieve the full drift diameter in the pipe, a soluble sliding sleeve ball seat base body is made of a soluble metal material, the soluble sliding sleeve ball seat base body can be completely dissolved in the formation water environment after fracturing, the full drift diameter in the pipe is completely achieved, extra operation is not needed, and the multistage sliding sleeve staged fracturing technology is high in construction efficiency, safe and economical. In order to ensure the reliability of the soluble sliding sleeve ball seat in the underground environment fracturing operation, the soluble sliding sleeve ball seat is required to have key service performances such as water resistance, corrosion resistance, erosion resistance and the like before and during the fracturing construction when the fracturing sliding sleeve is put into a well, and the coating is required to be prevented from influencing the solubility of a soluble base material after the fracturing is finished. If the surface of the ball seat of the soluble sliding sleeve is coated with one layer of coating or a plurality of layers of composite coatings, the coating has the performances of corrosion resistance, erosion resistance and the like in the early stage, and the coating can be damaged from the surface of the ball seat base body of the soluble sliding sleeve when the contact stress between the pressure-holding ball and the surface of the ball seat reaches a certain value in the fracturing process, so that downhole liquid can be smoothly contacted with the soluble base body, the smooth dissolution of the ball seat of the soluble sliding sleeve is ensured, and the application requirement of the whole construction period of the soluble sliding sleeve can be met. However, the prior art coatings or composite coatings do not meet the need for corrosion and erosion resistance and failure at a certain strength to achieve ball seat dissolution.
Disclosure of Invention
The invention provides a composite coating which sequentially comprises a micro-arc oxidation bottom layer, a wear-resistant layer and an anticorrosive layer from inside to outside.
In one embodiment, the electrolyte system used for the micro-arc oxidation bottom layer comprises at least one of a sodium silicate system, a sodium phosphate system and a sodium metaaluminate system.
In a specific embodiment, the raw materials of the wear-resistant layer are hard particles and a binder, wherein the hard particles are at least one of WC, TiC and SiC, and the binder is Co, Ni and SiO2At least one of (1).
In a concrete exampleIn the embodiment, the wear-resistant layer is a WC-Co layer, a TiC-Co layer, a SiC-Ni layer, a TiC-Ni layer and WC-SiO2-one of the Co layers.
In one embodiment, in the wear-resistant layer, the mass ratio of the hard particles to the binder is 2: 1 to 4: 1.
In one embodiment, the median particle diameter of the hard particles and the binder is independently 15 to 45 μm.
In a specific embodiment, the raw materials of the anticorrosive layer are modified polytetrafluoroethylene, modified polyether ether ketone and inorganic particles, wherein the inorganic particles are SiC and/or Al2O3。
In one embodiment, the inorganic particles have a median particle size of 15 to 45 μm.
In one embodiment, the modified polytetrafluoroethylene is polytetrafluoroethylene H in a mass ratio of 5:12SiO4And SiF4Modifying in KH-550 or in mixture.
In one embodiment, in the process of modifying polytetrafluoroethylene, ultrasound is simultaneously stirred at a frequency of 40 to 80KHz for 1.5 to 2 hours.
In a specific embodiment, the modified polyetheretherketone is polyetheretherketone in a mass ratio of 5: 1H2SiO4And SiF4Modifying in KH-550 or in mixture.
In one embodiment, in the process of modifying polyetheretherketone, ultrasound is performed at a frequency of 40 to 80KHz while stirring for 1.5 to 2 hours.
In a specific embodiment, the content of the modified polytetrafluoroethylene is 70% to 80%, the content of the modified polyether ether ketone is 10% to 15%, and the content of the inorganic particles is 10% to 15%, based on 100% by mass of the total of the modified polytetrafluoroethylene, the modified polyether ether ketone, and the inorganic particles.
In one embodiment, the micro-arc oxidation primer layer is obtained by oxidizing at a voltage of 500 to 540V for 28 to 32 min.
In one embodiment, the wear resistant layer is prepared by a supersonic flame spraying process with a propylene flow rate of 3.5 to 4m3H, argon flow of 3.5 to 4m3Flow rate of oxygen 28 to 30m3The coating thickness is 300 μm to 400 μm.
In one embodiment, the corrosion protection layer is produced by electrostatic spraying at least three times, each time before spraying is heated at a temperature of 260 to 300 ℃ for 30 to 35min (wherein the temperature is heated to 260 to 270 ℃ before the first spraying), each time the thickness of the spraying is 150 to 210 μm, after the last spraying is finished, the spraying is heated at 300 to 310 ℃ for 2 to 2.5h, and the total coating thickness is 450 μm to 600 μm.
The second invention provides the application of the composite coating according to any one of the first invention in the soluble sliding sleeve ball seat composite coating.
The invention has the beneficial effects that:
1. the wear-resistant layer used in the invention can resist erosion and corrosion.
2. The anti-corrosion coating is added with ceramic particles, modified polyether-ether-ketone and modified polytetrafluoroethylene, so that the penetration of a corrosive medium can be effectively blocked in a high-temperature and high-pressure corrosive medium, and the long-term stable underground service of the soluble ball seat is ensured.
3. The invention provides a composite coating through structural innovation, the composite coating has excellent corrosion resistance and erosion resistance, and when the contact strength reaches a certain value, the coating is damaged, so that the soluble ball seat matrix is smoothly dissolved.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary of the invention and are not to be construed as limiting the invention in any way.
Example 1
Preparing modified polytetrafluoroethylene: putting the polytetrafluoroethylene micro powder into H with the mass ratio of 5:12SiO4And SiF4In the mixed solution, ultrasonic treatment is carried out at the frequency of 40KHz for 2 hours, and micro powder is filtered out to obtain modified polymerTetrafluoroethylene.
Preparation of modified polyether-ether-ketone: putting the polyetheretherketone micropowder in H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 40KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polyether-ether-ketone.
The composite coating of the soluble sliding sleeve ball seat sequentially comprises a micro-arc oxidation bottom layer, a WC-Co wear-resistant layer and an anticorrosive layer from inside to outside. Wherein the micro-arc oxidation bottom layer is prepared in sodium silicate electrolyte, a constant voltage mode is adopted, the voltage is 500V, and the oxidation time is 28 min; mixing hard particles WC with a median particle size of 25 microns with a binder Co with a median particle size of 25 microns in a ratio of 4:1 to obtain a wear-resistant layer coating, and spraying the wear-resistant layer coating on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology, wherein the spraying process parameter is that the propylene flow is 3.5m3H, 3.5m of argon flow3Flow rate of oxygen 28 m/h3H, preparing a wear-resistant layer with the coating thickness of 300 mu m; mixing the modified polytetrafluoroethylene coating, SiC particles with the median particle size of 25 mu m and modified polyether ether ketone by mass content of 80%, 10% and 10% in sequence to obtain an anticorrosive coating, and spraying the anticorrosive coating on a soluble sliding sleeve ball seat workpiece containing a micro-arc oxidation bottom layer and a WC-Co wear-resistant layer by electrostatic spraying for three times on the surface of the WC-Co wear-resistant layer: before spraying, the workpiece is firstly placed in a heating furnace and heated to 260 ℃ and then sprayed, the workpiece is placed in the heating furnace at 300 ℃ and heated for 30min after each spraying, the thickness of each spraying is 150-210 microns, after the three spraying is finished, the workpiece is placed in the heating furnace again and heated to 300 ℃ for 2h, and the anticorrosive coating with the total thickness of 450 microns is obtained.
Example 2
Preparing modified polytetrafluoroethylene: putting the polytetrafluoroethylene micro powder into H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 80KHz while stirring for 1.5 hours, and filtering the micro powder to obtain the modified polytetrafluoroethylene.
Preparation of modified polyether-ether-ketone: putting the polyetheretherketone micropowder in H with the mass ratio of 5:12SiO4And SiF4In the mixed liquid, the frequency of 80KHz is usedAnd (3) stirring for 1.5 hours at the same time of ultrasonic treatment, and filtering the micro powder to obtain the modified polyether-ether-ketone.
The composite coating of the soluble sliding sleeve ball seat consists of a micro-arc oxidation bottom layer, a TiC-Co wear-resistant layer and a modified polytetrafluoroethylene anti-corrosion layer from inside to outside in sequence. Wherein the micro-arc oxidation bottom layer is prepared in sodium hexametaphosphate electrolyte, a constant voltage mode is adopted, the voltage is 540V, and the oxidation time is 32 min; mixing hard particles TiC with the median particle size of 45 micrometers and a binder Co with the median particle size of 45 micrometers, wherein the ratio of the hard particles TiC to the binder Co is 4:1 to obtain a wear-resistant layer coating, and spraying the wear-resistant layer coating on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology, wherein the spraying process parameter is propylene flow of 4m3H, argon flow 4m3Flow rate of oxygen gas of 30 m/h3H, preparing a wear-resistant layer with the thickness of 400 mu m; coating modified polytetrafluoroethylene with Al with a median particle size of 45 mu m2O3The particles and the modified polyether ether ketone are mixed according to the mass content of 70%, 15% and 15% in sequence to obtain an anticorrosive coating, and the anticorrosive coating is sprayed on the surface of the TiC-Co wear-resistant layer by electrostatic spraying for three times on a soluble sliding sleeve ball seat workpiece containing a micro-arc oxidation bottom layer and the TiC-Co wear-resistant layer: before spraying, the workpiece is firstly placed in a heating furnace and heated to 270 ℃ and then sprayed, the workpiece is placed in the heating furnace at 290 ℃ and heated for 35min after each spraying, the thickness of each spraying is 150-210 microns, after the three spraying is finished, the workpiece is placed in the heating furnace again and heated to 310 ℃ for 2h, and the anticorrosive coating with the total thickness of 500 microns is obtained.
Example 3
Preparing modified polytetrafluoroethylene: putting the polytetrafluoroethylene micro powder into H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polytetrafluoroethylene.
Preparation of modified polyether-ether-ketone: putting the polyetheretherketone micropowder in H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polyether-ether-ketone.
Compounding of soluble sliding sleeve ball seatThe coating is composed of a micro-arc oxidation bottom layer, a SiC-Ni wear-resistant layer and a modified polytetrafluoroethylene anticorrosive layer from inside to outside in sequence. Wherein the micro-arc oxidation bottom layer is prepared in sodium hydroxide electrolyte, a constant voltage mode is adopted, the voltage is 600V, and the oxidation time is 30 min; mixing hard particle SiC with the median particle size of 30 microns and a binder Ni with the median particle size of 30 microns in a ratio of 4:1 to obtain a wear-resistant layer coating, and spraying the wear-resistant layer coating on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology, wherein the spraying process parameter is that the propylene flow is 3.5m3H, argon flow 4m3Flow rate of oxygen 28 m/h3H, preparing a wear-resistant layer with the thickness of 350 mu m; mixing the modified polytetrafluoroethylene coating, SiC particles with the median particle size of 30 mu m and the modified polyether ether ketone according to the mass content of 75%, 12.5% and 12.5% in sequence to obtain an anticorrosive coating, and spraying the anticorrosive coating on the surface of the SiC-Ni wear-resistant layer by electrostatic spraying for three times on a soluble sliding sleeve ball seat workpiece containing a micro-arc oxidation bottom layer and a WC-Co wear-resistant layer: before spraying, the workpiece is firstly placed in a heating furnace and heated to 260 ℃ and then sprayed, the workpiece is placed in the heating furnace at 300 ℃ and heated for 30min after each spraying, the thickness of each spraying is 180-210 micrometers, after the three spraying is finished, the workpiece is placed in the heating furnace again and heated to 300 ℃ for 2.5h, and the anticorrosive coating with the total thickness of 600 micrometers is obtained.
Example 4
Preparing modified polytetrafluoroethylene: putting the polytetrafluoroethylene micro powder into H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polytetrafluoroethylene.
Preparation of modified polyether-ether-ketone: putting the polyetheretherketone micropowder in H with the mass ratio of 5:12SiO4And SiF4And (3) in the mixed solution, carrying out ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polyether-ether-ketone.
The composite coating system of the soluble sliding sleeve ball seat has good corrosion resistance and erosion resistance, and simultaneously falls off from the matrix when the contact strength reaches a certain value. The composite coating is sequentially subjected to micro-arc oxidation from inside to outsideA bottom layer, a TiC-Ni wear-resistant layer and a modified polytetrafluoroethylene anticorrosive layer. Wherein the micro-arc oxidation bottom layer is prepared in a sodium hydroxide electrolyte, a constant voltage mode is adopted, the voltage is 580V, and the oxidation time is 35 min; mixing hard particles TiC with the median particle size of 25 micrometers and a binder Ni with the median particle size of 25 micrometers, wherein the ratio of the hard particles TiC to the binder Ni is calculated according to the weight ratio of 4:1 to obtain a wear-resistant layer coating, and spraying the wear-resistant layer coating on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology, wherein the spraying process parameter is that the propylene flow is 3.5m3H, 3.5m of argon flow3Flow rate of oxygen 28 m/h3H, preparing a wear-resistant layer with the coating thickness of 300 mu m; coating modified polytetrafluoroethylene with Al with a median particle size of 25 mu m2O3The particles and the modified polyether-ether-ketone are mixed according to the mass content of 80%, 10% and 10% in sequence to obtain an anticorrosive coating, and the anticorrosive coating is sprayed on the surface of the TiC-Ni wear-resistant layer by electrostatic spraying for three times on a soluble sliding sleeve ball seat workpiece containing a micro-arc oxidation bottom layer and the TiC-Ni wear-resistant layer: before spraying, the workpiece is firstly placed in a heating furnace and heated to 260 ℃ and then sprayed, the workpiece is placed in the heating furnace at 300 ℃ and heated for 30min after each spraying, the thickness of each spraying is 180-210 micrometers, after the three spraying is finished, the workpiece is placed in the heating furnace again and heated to 300 ℃ for 2h, and the anticorrosive coating with the total thickness of 550 micrometers is obtained.
Example 5
Preparing modified polytetrafluoroethylene: putting the polytetrafluoroethylene micro powder into KH-550, performing ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polytetrafluoroethylene.
Preparation of modified polyether-ether-ketone: putting the polyetheretherketone micro powder into KH-550, performing ultrasonic treatment at the frequency of 60KHz while stirring for 2 hours, and filtering the micro powder to obtain the modified polyetheretherketone.
The composite coating system is suitable for the soluble sliding sleeve ball seat, has good corrosion resistance and erosion resistance, and simultaneously falls off from the matrix when the contact strength reaches a certain value. The composite coating comprises a micro-arc oxidation bottom layer and WC-SiO in sequence from inside to outside2A Co wear-resistant layer and a modified polytetrafluoroethylene anticorrosive layer. Wherein the micro-arc oxidation bottom layer is prepared and collected in sodium silicate electrolyteUsing a constant voltage mode, the voltage is 580V, and the oxidation time is 28 min; hard particles WC with the median particle size of 15 microns and a binder SiO with the median particle size of 15 microns2And binder Co is mixed in a ratio of 4: 1: 1 to obtain a wear-resistant layer coating, and spraying the wear-resistant layer coating on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology, wherein the spraying process parameter is that the propylene flow is 3.8m3H, argon flow 3.8m3Flow rate of oxygen gas of 29 m/h3H, preparing a wear-resistant layer with the coating thickness of 300 mu m; coating modified polytetrafluoroethylene with Al with the median particle size of 15 mu m2O3Mixing the particles with the modified polyether-ether-ketone in a mass content of 70%, 15% and 15% in sequence to obtain the anticorrosive coating, and coating on WC-SiO2The surface of the-Co wear-resistant layer is coated with an anti-corrosion layer by electrostatic spraying for three times, and the anti-corrosion layer contains a micro-arc oxidation bottom layer and WC-SiO2Spraying anticorrosive coating on a soluble sliding sleeve ball seat workpiece of a Co wear-resistant layer, heating the workpiece in a heating furnace to 260 ℃ before spraying, placing the workpiece in the heating furnace at 300 ℃ for heating for 30min after each spraying, wherein the thickness of each spraying is 180-210 microns, placing the workpiece in the heating furnace again after three spraying is finished, heating to 300 ℃ for 2.5h, and obtaining the anticorrosive coating with the total thickness of 600 microns.
Comparative example 1
The bottom layer was 160 μm epoxy powder (FBE), the transition layer was 210 μm Adhesive (AD), and the functional layer was 3.1mm Polyethylene (PE). The same electrostatic spraying process as in example 5 was used for each layer.
Comparative example 2
The composite coating comprises a micro-arc oxidation bottom layer and Al from inside to outside in sequence2O3A wear-resistant layer and an epoxy E-44 anticorrosive layer. Wherein the micro-arc oxidation bottom transition layer is prepared in sodium hexametaphosphate electrolyte, a constant voltage mode is adopted, the voltage is 550V, and the oxidation time is 32 min; hard particles Al with the median particle diameter of 45 microns2O3Spraying hard granular Al on the micro-arc oxidation bottom layer by adopting a supersonic flame spraying technology2O3The spraying process parameter is propylene flow of 4.2m3H, argon flow 4.3m3Flow rate of oxygen gas of 30 m/h3Per hour to obtain coating thicknessA wear layer of 300 μm; and coating the epoxy E44 paint on the wear-resistant layer by adopting a brush coating mode to obtain the anticorrosive layer.
And (3) performance measurement:
and (3) testing the corrosion resistance of the composite coating: the soluble sliding sleeve ball seat coated with the composite coatings of examples 1 to 5 and comparative examples 1 and 2 was placed in a 2 wt% KCl aqueous solution environment at 93 ℃ under 20MPa, and the corrosion resistance time of the composite coating was measured. The results are shown in Table 1.
Erosion resistance test of composite coating: the amount of thinning of the wearing layer was measured by erosion of the soluble sliding sleeve ball seat coated with the composite coatings of examples 1 to 5 and comparative examples 1 and 2 for 24 hours by a liquid containing 20% sand at a flow rate of 25 m/s. The results are shown in Table 1. TABLE 1
| Examples | Corrosion resistance time/h | Reduction of wear layer |
| Example 1 | 110 | 45％ |
| Example 2 | 117 | 40％ |
| Example 3 | 109 | 43％ |
| Example 4 | 100 | 41％ |
| Example 5 | 106 | 40.5％ |
| Comparative example 1 | 79 | 65％ |
| Comparative example 2 | 87 | 52％ |
And (3) damage test of the composite coating: and (3) assembling the soluble ball seat coated with the composite coating of the embodiment 1 to 5 with the rest parts of the pitching sliding sleeve, placing the pressure building ball on the ball seat, and installing the pressure building tool. When pressure of 20MPa or more is applied to the pressure building ball, the composite coating on the outer surface of the soluble ball seat is contacted with the pressure building ball, so that the composite coating is locally crushed. The soluble ball seat is detached and put into 2 wt% KCl solution, and the solution can contact the soluble ball seat matrix through the gap of the broken composite coating to dissolve the soluble ball seat.
While the invention has been described with reference to specific embodiments, those skilled in the art will appreciate that various changes can be made without departing from the true spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation, material, composition of matter, and method to the essential scope and spirit of the present invention. All such modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A composite coating comprises a micro-arc oxidation bottom layer, a wear-resistant layer and an anticorrosive layer from inside to outside in sequence.
2. The composite coating of claim 1, wherein the electrolyte system used for the micro-arc oxidation primer layer comprises at least one of a sodium silicate system, a sodium phosphate system, and a sodium metaaluminate system.
3. The composite coating of claim 1 or 2, wherein the wear resistant layer is prepared from hard particles and a binder, wherein the hard particles are at least one of WC, TiC and SiC, and the binder is Co, Ni and SiO2At least one of;
preferably, the wear-resistant layer is a WC-Co layer, a TiC-Co layer, a SiC-Ni layer, a TiC-Ni layer and WC-SiO2-one of a Co layer;
preferably, the median particle diameter of the hard particles and the binder is independently 15 to 45 μm.
4. The composite coating according to claim 3, wherein in the wear resistant layer, the mass ratio of the hard particles to the binder is 2: 1 to 4: 1.
5. the composite coating according to any one of claims 1 to 4, wherein the raw materials of the corrosion protection layer are modified polytetrafluoroethylene, modified polyetheretherketone and inorganic particles, wherein the inorganic particles are SiC and/or Al2O3；
Preferably, the median particle diameter of the inorganic particles is 15 to 45 μm.
6. The composite coating of claim 5, wherein the modified polytetrafluoroethylene is polytetrafluoroethylene H in a mass ratio of 5:12SiO4And SiF4Modifying in KH-550 or in mixture.
7. The composite coating of claim 5, wherein the modified polyetheretherketone is polyetheretherketone in a mass ratio of 5: 1H2SiO4And SiF4Modifying in KH-550 or in mixture.
8. The composite coating according to claim 5, wherein the modified polytetrafluoroethylene is present in an amount of 70 to 80%, the modified polyetheretherketone is present in an amount of 10 to 15%, and the inorganic particles are present in an amount of 10 to 15%, based on 100% by mass of the total of the modified polytetrafluoroethylene, the modified polyetheretherketone, and the inorganic particles.
9. The composite coating according to any of claims 1 to 8, wherein the micro-arc oxidized primer layer is obtained by oxidation at a voltage of 500 to 600V for 28 to 35 min;
preferably, the wear-resistant layer is prepared by a supersonic flame spraying process, and the process parameter is that the propylene flow is 3.5-4 m3H, argon flow of 3.5 to 4m3Flow rate of oxygen 28 to 30m3Per hour, the thickness of the coating is 300 mu m to 400 mu m;
preferably, the anticorrosive coating is prepared by electrostatic spraying at least three times, each time the anticorrosive coating is heated at the temperature of 260-300 ℃ for 30-35 min before spraying, the thickness of each spraying is 150-210 mu m, after the last spraying is finished, the anticorrosive coating is heated at the temperature of 300-310 ℃ for 2-2.5 h, and the total coating thickness is 450-600 mu m.
10. Use of a composite coating according to any one of claims 1 to 9 as a soluble slip sleeve ball seat composite coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011106567.9A CN114437579A (en) | 2020-10-16 | 2020-10-16 | Composite coating and composition for soluble sliding sleeve ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011106567.9A CN114437579A (en) | 2020-10-16 | 2020-10-16 | Composite coating and composition for soluble sliding sleeve ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114437579A true CN114437579A (en) | 2022-05-06 |
Family
ID=81357642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011106567.9A Pending CN114437579A (en) | 2020-10-16 | 2020-10-16 | Composite coating and composition for soluble sliding sleeve ball seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114437579A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140370324A1 (en) * | 2012-03-12 | 2014-12-18 | National Institute For Materials Science | Cermet Coating and Coated Metal Body Having the Cermet Coating, Method of Producing Cermet Coating, and Method of Producing Coated Metal Body |
| CN104879109A (en) * | 2015-04-22 | 2015-09-02 | 中国石油天然气股份有限公司 | Decomposable fracturing ball seat surface composite film layer, ball seat and ball seat preparation method |
| CN107604354A (en) * | 2017-09-15 | 2018-01-19 | 中国兵器科学研究院宁波分院 | The preparation method of pressure break magnesium alloy ball seat inner surface erosion resistance coating |
| CN207243798U (en) * | 2017-09-11 | 2018-04-17 | 四川恒保森新材料有限公司 | A kind of stainless steel substrate wear resistant corrosion resistant coating structure |
| CN111378354A (en) * | 2019-05-07 | 2020-07-07 | 江苏科辉环境科技有限公司 | High-temperature-resistant anti-corrosion anti-scaling powder coating and construction method thereof |
-
2020
- 2020-10-16 CN CN202011106567.9A patent/CN114437579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140370324A1 (en) * | 2012-03-12 | 2014-12-18 | National Institute For Materials Science | Cermet Coating and Coated Metal Body Having the Cermet Coating, Method of Producing Cermet Coating, and Method of Producing Coated Metal Body |
| CN104879109A (en) * | 2015-04-22 | 2015-09-02 | 中国石油天然气股份有限公司 | Decomposable fracturing ball seat surface composite film layer, ball seat and ball seat preparation method |
| CN207243798U (en) * | 2017-09-11 | 2018-04-17 | 四川恒保森新材料有限公司 | A kind of stainless steel substrate wear resistant corrosion resistant coating structure |
| CN107604354A (en) * | 2017-09-15 | 2018-01-19 | 中国兵器科学研究院宁波分院 | The preparation method of pressure break magnesium alloy ball seat inner surface erosion resistance coating |
| CN111378354A (en) * | 2019-05-07 | 2020-07-07 | 江苏科辉环境科技有限公司 | High-temperature-resistant anti-corrosion anti-scaling powder coating and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 许士英: "《家用电器技术》", 31 July 1994, 机械工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108795128B (en) | Double-layer compact metal anticorrosive coating formed by low-temperature sintering, and preparation method and application thereof | |
| CN107459906A (en) | Corrosion-resistant composite layer | |
| CN101671507B (en) | Preparation and application of oil well pipe dedicated weather-proof and high temperature, high pressure and high impact resisting external protective material | |
| CN101284969B (en) | Solvent-free epoxy coal tar heavy duty anticorrosive coating and preparation process thereof | |
| CN105524495A (en) | Turbine blade coating composition and method thereof | |
| CN104877556A (en) | Composite coating with wear resistance, heat resistance and corrosion resistance | |
| CN102500537B (en) | Preparation method for anticorrosion wear-resistant anti-scaling plunger of oil well pump | |
| CN100366690C (en) | Composite powdered polyphenyl thioether coating and its preparation method | |
| CN110670011A (en) | Self-polishing anti-corrosion and anti-scale coating and preparation method thereof | |
| CN103759282B (en) | A kind of anticorrosion method for interior of metal flue | |
| CN105132852B (en) | A kind of flame-spraying prepares Al/Al2O3The method of multi-functional coatings | |
| CN201080789Y (en) | Corrosion resistant bore rod | |
| CN100549115C (en) | The oil-pipe coating of hydrogen sulfide corrosion resistant and manufacture method | |
| CN114437579A (en) | Composite coating and composition for soluble sliding sleeve ball seat | |
| CN102690548A (en) | A solvent-free epoxy acid-resistant anticorrosion putty coating used for smoke evacuation cooling tower | |
| CN107216774B (en) | A kind of magnetism anti-corrosion self-healing coatings and its application in the erosion of oil gas field casing tube anti-corrosive | |
| CN101927586B (en) | Metallic matrix surface composite coating and preparation method thereof | |
| CN103196006A (en) | High-wear-resistance delivery pipe and manufacturing method thereof | |
| CN109181491A (en) | One kind being suitable for pipeline internal corrosion nanometer solventless coatings and preparation method thereof | |
| CN113774309B (en) | Preparation method of composite powder, dynamic friction sealing coating and preparation method | |
| CN107057421A (en) | A kind of rebar surface nanosizing composite coating and preparation method and application | |
| CN111187554A (en) | Anticorrosive paint for large-diameter high-temperature-resistant thermal steel pipe and spraying method | |
| CN113061387B (en) | Anti-scaling coating for oil pipe of water injection well and preparation and application methods thereof | |
| CN107337951A (en) | A kind of preparation method and applications of steel construction high temperature insulation anticorrosive paint | |
| CN211635965U (en) | Desulfurizing tower with anticorrosion structure |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220506 |