CN109943201A - It is less than oil pipe good antiscale property graphene modified epoxy coating and preparation method thereof of 50000ppm water injection well for salinity - Google Patents
It is less than oil pipe good antiscale property graphene modified epoxy coating and preparation method thereof of 50000ppm water injection well for salinity Download PDFInfo
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Abstract
The invention discloses a kind of oil pipe good antiscale property graphene modified epoxy coatings and preparation method thereof for being less than 50000ppm water injection well for salinity, and raw material includes two components of A, B.Component A includes: novolac epoxy resin: 38%~40%；Organosilicon epoxy resin: 8%~14%；The graphene oxide of partial reduction: 0.05%~0.08%；Pigments and fillers: 15%~35%；Organic solvent: 4%~8%；Auxiliary agent: 2%~3%.B component is curing agent: 12%~20%.Good antiscale property graphene modified epoxy coating of the invention, after the graphene oxide and novolac epoxy resin and organosilicon epoxy resin of partial reduction are compound, obtained coating compactness is good；Surface roughness is lower than 3 μm, is less than 50000mg/L in salinity, bacterial content has excellent scale-preventing performance in the water filling environment lower than 1000/ml.
Description
Technical field
The invention belongs to oil well pipe corrosion and protection technical fields, and in particular to one kind is less than 50000ppm for salinity
The oil pipe of water injection well good antiscale property graphene modified epoxy coating and preparation method thereof.
Background technique
Water flood recovery technology is the main method that each elephant improves oil recovery factor.In entering with In Oil Field Exploration And Development
Later period, the continuous deterioration of injection water quality, sulfate reducing bacteria, iron bacteria, saprophytic bacteria are increasing；The multiple-effect of bacterium,
Such as deteriorate water quality, increase water viscosity, will lead to oil reservoir and destroy and equipment corrosion.In addition containing chlorine, calcium, magnesium etc. in injection water quality
Ion, therefore, the corrosion of oil field well water injection string and scale problems have become an important factor for influencing tubing string service life.Have
Organic coating (phenolic and epoxies) guard technology is the aseptic technic that downhole water injection string generally uses, in Xinjiang Oilfield, victory
The field uses such as sharp oil field, Changqing oilfields have achieved preferable economic effect.
However, most organic coating anti-corrosion effects of field use are preferable, but scale-preventing performance is poor.In high mineralization
Spend the water filling block of (especially high calcium-containing, magnesium plasma), high bacterial content, the problem of causing water injection string to fail because of in-tube fouling
It happens occasionally.For example, Shengli Oil Field fractional water flooding pipeline was on active service after about three years, because in-tube fouling causes effective inner diameter of pipeline to drop
Low 70%；Xinjiang Oilfield fractional water flooding well antisepsis oil pipe was on active service after about three years, because in-tube fouling leads to the effective internal diameter drop of oil pipe
Low 40%.
Therefore, oil and gas enterprise is to can reduce surface scale, improve stable economical of water injection pipe service life, performance
Water injection pipe coating protection technology has strong production requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of oil pipe good antiscale property stones for being less than 50000ppm water injection well for salinity
Black alkene modified epoxy coating and preparation method thereof, to overcome the problems of the above-mentioned prior art, graphene of the invention is modified
Epoxy coating can be less than 50000mg/L in salinity, and bacterial content is prevented in the water filling environment lower than 1000/ml with excellent
Dirty performance.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
It is less than the oil pipe good antiscale property graphene modified epoxy coating of 50000ppm water injection well for salinity, preparation is former
Material include component A and B component, the component A include novolac epoxy resin, organic siliconresin, partial reduction graphene oxide,
Pigments and fillers, organic solvent and auxiliary agent, the B component are curing agent；Based on mass fraction, each raw material proportioning is as follows:
Novolac epoxy resin: 38%~40%
Organosilicon epoxy resin: 8%~14%
The graphene oxide of partial reduction: 0.05%~0.08%
Pigments and fillers: 15%~35%
Organic solvent: 4%~8%
Auxiliary agent: 2%~3%
Curing agent: 12%~20%
Wherein, the specific surface area of the graphene oxide of the partial reduction is 350~500m2/ g, and partial reduction
Graphene oxide with a thickness of 0.1~1 μm, the number of plies is 1~6 layer.
Further, the pigments and fillers are silica flour, mica, talcum powder, fumed silica, barium sulfate, silicon carbide, sulphur
One of sour zinc and micaceous iron oxide or a variety of and carbon black mixture.
Further, the auxiliary agent is the mixture of dispersing aid, coupling agent, adhesive force auxiliary agent, defoaming agent and levelling agent,
And the quality of dispersing aid and coupling agent and with the quality of other three kinds of auxiliary agents and between ratio be 1:1.
Further, the curing agent is the mixing of one or both of alicyclic modified amine and polyetheramine arbitrary proportion
Object.
Further, the organic solvent is dimethylbenzene, n-butanol, 1,4-butanediol diglycidyl ether and acetate butyl
One of or a variety of arbitrary proportions mixture.
A kind of system for the oil pipe good antiscale property graphene modified epoxy coating being less than 50000ppm water injection well for salinity
Preparation Method, comprising the following steps:
Step 1: the graphene oxide of partial reduction is added in the organic solvent of part, it is evenly dispersed using ultrasound, surpass
The sound time is 90min, and supersonic frequency 7KHZ obtains graphene dispersing solution；
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, carries out ultrasonic disperse, surpasses
The sound time is 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the epoxy novolac tree being added
Rouge is the 2% of novolac epoxy resin gross mass, and the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, is uniformly mixed；Then plus
Enter part of auxiliary, is uniformly mixed；Organosilicon epoxy resin is added, mixing is stirred until homogeneous；Then part of auxiliary is added, stirs
To uniform mixing, mixed liquor A is obtained；
Step 4: carbon black being added into mixed liquor A, is stirred until homogeneous mixing, other pigments and fillers are then added, stirs to equal
Even mixing, obtains mixed liquid B；
Step 5: mixed liquid B be ground to fineness less than 15 microns, remaining auxiliary agent and organic solvent is then added,
It is stirred until homogeneous mixing, through component A is obtained by filtration；
Step 6: component A uniformly being mixed with B component, obtains the painting of injection well tubing good antiscale property graphene modified epoxy
Material；
Step 7: then water injection well is sprayed to graphene modified phenolic epoxy coating viscosity-adjusting agent to 40~45cst
On pretreated oil pipe, low-temperature setting, room temperature curing is less than 50000ppm water injection well to get to for salinity after surface drying
Oil pipe good antiscale property graphene modified epoxy coating.
Further, low-temperature setting temperature is 50~55 DEG C in step 7, and soaking time is 2~2.5h；Room temperature in step 7
Curing time is 5~6d.
Further, gained coating layer thickness is 160~190 μm in step 7.
Further, the mass ratio for the organic solvent being added in the organic solvent and step 5 being added in step 1 is 6:4.
Further, what is be added in the auxiliary agent and step 5 of the auxiliary agent, second of addition that are added for the first time in step 3 helps
The mass ratio of agent is 3:3:4.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is compound using the graphene oxide and organosilicon epoxy resin and novolac epoxy resin of partial reduction, obtains
Coating compactness it is good, coating tubing surface roughness be lower than 2.5 μm, smooth coating surface does not allow dirt easy to hang, in addition part
The graphene oxide of reduction remains the performance of graphene oxide, the oxygen that graphene oxide can trigger oxygen radical and then induce
Change damage, the anti-microbial property of coating can be improved, is less than 50000mg/L in salinity, bacterial content is lower than the note of 1000/ml
There is excellent scale-preventing performance in water environment, in addition, by nanoscale graphene dispersion in the system of epoxy coating, not only
The impermeability, high temperature resistance and antiseptic property of epoxy coating can be significantly improved, moreover it is possible to the scale-preventing performance of coating is effectively improved,
The graphene oxide of the partial reduction of nano-scale has physics cutting effect to the cell membrane of micron-sized bacterium, to destroy
The graphene oxide edge of bacterium, reduction is sharper, and is conducive to electric charge transfer, stronger to the destructiveness of bacterium, therefore,
It can be further improved the bacteriostasis property of coating after compound with coating.And graphene large specific surface area, a small amount of graphene of addition are
The performance of coating can be significantly improved, painting in addition can be improved with certain hydrophobicity using the graphene oxide of partial reduction
The good antiscale property and antiseptic property of layer；Simultaneous oxidation reduction method preparation partial reduction graphene oxide price down to 1.5 yuan/
Gram；Economic value is higher.
The coating that the method for the present invention obtains is less than 50000mg/L, bacterial content compared with Conventional epoxy coating, in salinity
It is tested in solution lower than 1000/ml, epoxy coating prepared by the present invention has good anti-relative to Conventional epoxy coating
Fouling performance.
Further, the method for the present invention only needs (50~55 DEG C) 2~2.5h of solidification of low temperature, then the normal temperature cure time 5~
6d；And a spray mo(u)lding, effectively reduce the energy consumption in existing coat preparing technology.
Detailed description of the invention
Fig. 1 a is certain oil field in the scale-preventing performance testing experiment result with epoxy coating；
Fig. 1 b is the scale-preventing performance testing experiment result of good antiscale property graphene modified epoxy coating prepared by embodiment 1；
Fig. 2 a is certain oil field scale-preventing performance testing experiment result under the high temperature and pressure with epoxy coating；
Fig. 2 b is that the oil pipe good antiscale property graphene for being less than 50000ppm water injection well for salinity prepared by embodiment 2 changes
Scale-preventing performance testing experiment result under the high temperature and pressure of property epoxy coating；
Fig. 3 is coating morphology figure prepared by embodiment 3；
Fig. 4 is pure epoxy coating and graphene modified epoxy coating contact angle test result.
Specific embodiment
Embodiments of the present invention are described in further detail below:
A kind of oil pipe good antiscale property graphene modified epoxy coating being less than 50000ppm water injection well for salinity, including
A, two components of B, component A includes: novolac epoxy resin, the graphene oxide of partial reduction, pigments and fillers, has organic siliconresin
Solvent, auxiliary agent, B component are curing agent.
Each component and its weight ratio are as follows:
Component A includes:
Novolac epoxy resin: 38%~40%
Organosilicon epoxy resin: 8%~14%
The graphene oxide of partial reduction: 0.05%~0.08%
Pigments and fillers: 15%~35%
Organic solvent: 4%~8%
Auxiliary agent: 2%~3%
B component curing agent: 12%~20%
350~500m of specific surface area of the graphene oxide of the partial reduction2/ g, and the graphite oxide of partial reduction
Alkene with a thickness of 0.1~1 μm, the number of plies is 1~6 layer；Pigments and fillers include: silica flour, mica, talcum powder, fumed silica, sulphur
The mixing of any one or more in sour barium, silicon carbide, zinc sulfate and micaceous iron oxide etc. with carbon black, to be each greater than percentage
Ratio mixing than zero；Auxiliary agent includes dispersing aid, coupling agent, adhesive force auxiliary agent, defoaming agent and levelling agent (dispersing aid and idol
The sum-rate of the total amount and other three kinds of auxiliary agents that join agent is 1:1, concrete condition tune when other ratios are according to coating
It is whole), curing agent includes that alicyclic modified amine and polyetheramine etc. are one such or two kinds, organic solvent be selected from dimethylbenzene, n-butanol,
In 1,4- butanediol diglycidyl ether and acetate butyl any one or it is two or more.
A kind of system for the oil pipe good antiscale property graphene modified epoxy coating being less than 50000ppm water injection well for salinity
Preparation Method, this method include:
Step 1: the graphene oxide of partial reduction is added to 60% (the 60% of organic solvent gross mass) organic solvent
In, graphene dispersing solution is obtained using ultrasound evenly dispersed, ultrasonic time 90min, supersonic frequency 7KHZ.
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, carries out ultrasonic disperse, surpasses
The sound time is 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the epoxy novolac tree being added
Rouge is the 2% of novolac epoxy resin gross mass, and the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, 10~15min of stirring is extremely
Be uniformly mixed, then be added 30% auxiliary agent (the 30% of auxiliary agent gross mass), stirring 10~15min to be uniformly mixed；It adds
Organosilicon epoxy resin, 10~15min of stirring to uniform mixing；Then 30% auxiliary agent (the 30% of auxiliary agent gross mass) is added,
10~15min is stirred to uniform mixing, obtains mixed liquor A；
Step 4: carbon black being added into the mixed liquor A in step 3, stirring 10-15min is to uniform mixing, then by other
Pigments and fillers are added, and stirring 10-15min obtains mixed liquid B to uniform mixing；
Step 5: the mixed liquid B in step 4 being ground to fineness less than 15 microns, is added and then is added remaining 40% and help
Agent and remaining 40% organic solvent, coating component A is obtained by filtration in 4~5min of high-speed stirred three times.
Step 6: coating component A obtained in step 5 uniformly being mixed with B component, it is anti-to obtain a kind of injection well tubing use
Fouling graphene modified epoxy resin mortar；
Step 7: then water injection well is sprayed to graphene modified phenolic epoxy coating viscosity-adjusting agent to 40~45cst
On pretreated oil pipe, low-temperature setting, the normal temperature cure after surface drying is obtained small for salinity with a thickness of 165~190 μm
In the oil pipe good antiscale property graphene modified epoxy coating of 50000ppm water injection well.
Below with reference to embodiment, the invention will be described in further detail:
Embodiment 1
The component and its weight ratio of coating are as follows:
Novolac epoxy resin: 39%
Organosilicon epoxy resin: 8%
The graphene oxide of partial reduction: 0.05%
Pigments and fillers: 32.95%
Auxiliary agent: 3%
Curing agent: 13%
Organic solvent: 4%
350~500m of specific surface area of the graphene oxide of the partial reduction2/g。
Step 1: the graphene oxide of partial reduction is weighed, is mixed with part organic solvent, it is evenly dispersed using ultrasound, surpass
The sound time is 90min, and supersonic frequency 7KHZ obtains graphene dispersing solution.
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, carries out ultrasonic disperse, surpasses
The sound time is 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the epoxy novolac tree being added
Rouge is the 2% of novolac epoxy resin gross mass, and the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, stirring 13min is to uniform
Mixing；Then plus appropriate amount of addition agent, high-speed stirred 12min are mixed to uniform；Organic siliconresin is added in above-mentioned mixture again, is stirred
12min is mixed to uniform mixing, then plus appropriate amount of addition agent, stirring 12min obtain mixed liquor A to uniform mixing；
Step 4: carbon black being added into the mixed liquor A in step 3, then stirring 12min fills out other face to uniform mixing
Expect that (silica flour, mica, talcum powder, fumed silica, silicon carbide and micaceous iron oxide) is added, stirring 12min is mixed to uniform
It closes, obtains mixed liquid B；
Step 5: the mixed liquor in step 4 is ground to fineness less than 15 microns, remaining auxiliary agent and organic solvent is added, it is high
Speed stirring 4min, through component A is obtained by filtration three times.
Step 6: curing agent polyetheramine being added in the component A of step 5, it is anti-to be uniformly mixed to get a kind of injection well tubing use
Fouling graphene modified epoxy resin mortar.
Step 7: by water injection well graphene modified phenolic epoxy coating viscosity-adjusting agent to 40cst, then spray to according to
On the pretreated oil pipe of standard GB/T/T 8923.1, solidifies 2.5h at 50 °C, then normal temperature cure 6d, obtain
A kind of oil pipe good antiscale property graphene modified epoxy coating being less than 50000ppm water injection well for salinity.
To in embodiment 1 Coating Surface Roughness and thickness test, measure 10 times, Coating Surface Roughness is maximum
2.4 μm of value, 2.0 μm of average value；163 μm of the minimum thickness of coating；182 μm of average thickness.
To the oil pipe good antiscale property graphene modified epoxy for being less than 50000ppm water injection well for salinity in embodiment 1
Coating carries out scale-preventing performance test, and as a control group with the common epoxy coating in certain oil field, at normal temperatures and pressures, salinity is small
In 50000mg/L, bacterial content impregnates 90d in the water filling environment lower than 1000/ml.Test result is as shown in Figure 1, epoxy applies
There is scale formation in layer, and the oil pipe good antiscale property graphene modified epoxy coating of 50000ppm water injection well is less than for salinity
Test front and back is without significant change.
Embodiment 2
The component and its weight ratio of coating are as follows:
Novolac epoxy resin: 38%
Organosilicon epoxy resin: 8%
The graphene oxide of partial reduction: 0.08%
Pigments and fillers: 35%
Auxiliary agent: 2%
Curing agent: 12%
Organic solvent: 4.92%
350~500m of specific surface area of the graphene oxide of the partial reduction2/g。
Step 1: the graphene oxide of partial reduction is weighed, is mixed with organic solvent, it is evenly dispersed using ultrasound, when ultrasonic
Between be 90min, supersonic frequency 7KHZ obtains graphene dispersing solution.
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, carries out ultrasonic disperse, surpasses
The sound time is 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the epoxy novolac tree being added
Rouge is the 2% of novolac epoxy resin gross mass, and the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, stirring 14min is to uniform
Mixing；Then plus appropriate amount of addition agent, high-speed stirred 13min are mixed to uniform；Organic siliconresin is added in above-mentioned mixture again, is stirred
15min is mixed to uniform mixing, then plus appropriate amount of addition agent, stirring 14min obtain mixed liquor A to uniform mixing；
Step 4: carbon black being added into the mixed liquor A in step 3, then stirring 12min fills out other face to uniform mixing
Expect that (silica flour, mica, talcum powder, fumed silica, silicon carbide and micaceous iron oxide) is added, stirring 15min is mixed to uniform
It closes, obtains mixed liquid B；
Step 5: the mixed liquor in step 4 is ground to fineness less than 15 microns, remaining auxiliary agent and organic solvent is added, it is high
Speed stirring 5min, through component A is obtained by filtration three times.
Step 6: curing agent alicyclic modified amine being added in the component A of step 5, be uniformly mixed to get a kind of injection well tubing
With good antiscale property graphene modified epoxy resin mortar.
Step 7: by water injection well graphene modified phenolic epoxy coating viscosity-adjusting agent to 45cst, then spray to according to
On the pretreated oil pipe of standard GB/T/T 8923.1, solidify 2h at a temperature of 55 DEG C, then normal temperature cure 5d, obtains one
Kind is less than the oil pipe good antiscale property graphene modified epoxy coating of 50000ppm water injection well for salinity.
To in embodiment 2 Coating Surface Roughness and thickness test, measure 10 times, Coating Surface Roughness is maximum
2.5 μm of value, 2.1 μm of average value；169 μm of the minimum thickness of coating；187 μm of average thickness.
To in embodiment 2 coating carry out high temperature resistance test, and with certain oil field epoxy coating as control
Group, 100 DEG C of test temperature, pressure 10MPa, CO20.2MPa is divided, salinity is less than 50000mg/L, and bacterial content is lower than 1000
30d is tested in the solution of a/ml.Test result is as shown in Fig. 2, serious scale formation has occurred in epoxy coating surface, and uses
It is only sent out in sample regional area in the oil pipe that salinity is less than 50000ppm water injection well with good antiscale property graphene modified epoxy coating
Raw fouling.
Embodiment 3
The component and its weight ratio of coating are as follows:
Novolac epoxy resin: 40%
Organosilicon epoxy resin: 14%
The graphene oxide of partial reduction: 0.06%
Pigments and fillers: 15%
Organic solvent: 8%
Auxiliary agent: 2.94%
B component curing agent: 20%
350~500m of specific surface area of the graphene oxide of the partial reduction2/g。
Step 1: the graphene oxide of partial reduction is weighed, is mixed with organic solvent, it is evenly dispersed using ultrasound, when ultrasonic
Between be 90min, supersonic frequency 7KHZ obtains graphene dispersing solution.
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, carries out ultrasonic disperse, surpasses
The sound time is 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the epoxy novolac tree being added
Rouge is the 2% of novolac epoxy resin gross mass, and the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, stirring 10min is to uniform
Mixing；Then plus appropriate amount of addition agent, high-speed stirred 10min are mixed to uniform；Organic siliconresin is added in above-mentioned mixture again, is stirred
10min is mixed to uniform mixing, then plus appropriate amount of addition agent, stirring 10min obtain mixed liquor A to uniform mixing；
Step 4: carbon black being added into the mixed liquor A in step 3, then stirring 10min fills out other face to uniform mixing
Expect that (silica flour) is added, stirring 10min obtains mixed liquid B to uniform mixing；
Step 5: the mixed liquor in step 4 is ground to fineness less than 15 microns, remaining auxiliary agent and organic solvent is added, it is high
Speed stirring 5min, through component A is obtained by filtration three times.
Step 6: curing agent alicyclic modified amine and polyetheramine being added in the component A of step 5, a kind of note is uniformly mixed to get
Well tubing good antiscale property graphene modified epoxy resin mortar.
Step 6: by water injection well graphene modified phenolic epoxy coating viscosity-adjusting agent to 43cst, then spray to according to
On the pretreated oil pipe of standard GB/T/T 8923.1, solidify 2h at a temperature of 55 DEG C, then normal temperature cure 5d, obtains one
Kind injection well tubing good antiscale property graphene modified epoxy coating.
To in embodiment 3 Coating Surface Roughness and thickness test, measure 10 times, Coating Surface Roughness is maximum
1.9 μm of value, 1.5 μm of average value；165 μm of the minimum thickness of coating；181 μm of average thickness.Coating morphology is as shown in Figure 3；And with not
The coating for adding graphene is as a comparison sample, measures the contact angle of coating, and the contact angle for measuring pure epoxy coating is 90.21,
The contact angle of graphene modified epoxy coating is 94.87, and test result is shown in Fig. 4.
Claims (10)
1. being less than the oil pipe good antiscale property graphene modified epoxy coating of 50000ppm water injection well for salinity, feature exists
In preparing raw material includes component A and B component, and the component A includes novolac epoxy resin, organic siliconresin, partial reduction
Graphene oxide, pigments and fillers, organic solvent and auxiliary agent, the B component are curing agent；Based on mass fraction, each raw material proportioning is such as
Under:
Novolac epoxy resin: 38%~40%
Organosilicon epoxy resin: 8%~14%
The graphene oxide of partial reduction: 0.05%~0.08%
Pigments and fillers: 15%~35%
Organic solvent: 4%~8%
Auxiliary agent: 2%~3%
Curing agent: 12%~20%
Wherein, the specific surface area of the graphene oxide of the partial reduction is 350~500m2/ g, and the oxidation stone of partial reduction
Black alkene with a thickness of 0.1~1 μm, the number of plies is 1~6 layer.
2. the oil pipe according to claim 1 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
Epoxy coating, which is characterized in that the pigments and fillers are silica flour, mica, talcum powder, fumed silica, barium sulfate, carbonization
One of silicon, zinc sulfate and micaceous iron oxide or a variety of and carbon black mixture.
3. the oil pipe according to claim 1 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
Epoxy coating, which is characterized in that the auxiliary agent is the mixing of dispersing aid, coupling agent, adhesive force auxiliary agent, defoaming agent and levelling agent
Object, and the quality of dispersing aid and coupling agent and with the quality of other three kinds of auxiliary agents and between ratio be 1:1.
4. the oil pipe according to claim 1 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
Epoxy coating, which is characterized in that the curing agent is the mixed of one or both of alicyclic modified amine and polyetheramine arbitrary proportion
Close object.
5. the oil pipe according to claim 1 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
Epoxy coating, which is characterized in that the organic solvent is dimethylbenzene, n-butanol, 1,4-butanediol diglycidyl ether and acetic acid
The mixture of one of fourth rouge or a variety of arbitrary proportions.
6. a kind of oil pipe described in claim 1 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
The preparation method of epoxy coating, which comprises the following steps:
Step 1: the graphene oxide of partial reduction is added in the organic solvent of part, it is evenly dispersed using ultrasound, when ultrasonic
Between be 90min, supersonic frequency 7KHZ obtains graphene dispersing solution；
Step 2: novolac epoxy resin is added into graphene dispersing solution, after mechanical stirring is uniform, ultrasonic disperse is carried out, when ultrasonic
Between be 90min, supersonic frequency 4.5KHZ, graphene epoxy resin mixed liquor is obtained, wherein the novolac epoxy resin being added is
The 2% of novolac epoxy resin gross mass, the number of plies of graphene is 1~3 layer after dispersion, and thickness is less than 3nm；
Step 3: graphene epoxy resin mixed liquor being added in remaining novolac epoxy resin, is uniformly mixed；Then addition portion
Divide auxiliary agent, is uniformly mixed；Organosilicon epoxy resin is added, mixing is stirred until homogeneous；Then part of auxiliary is added, stirs to equal
Even mixing, obtains mixed liquor A；
Step 4: carbon black being added into mixed liquor A, is stirred until homogeneous mixing, other pigments and fillers are then added, is stirred until homogeneous mixed
It closes, obtains mixed liquid B；
Step 5: mixed liquid B be ground to fineness less than 15 microns, remaining auxiliary agent and organic solvent is then added, is stirred
To uniform mixing, through component A is obtained by filtration；
Step 6: component A uniformly being mixed with B component, obtains injection well tubing good antiscale property graphene modified epoxy resin mortar；
Step 7: by water injection well graphene modified phenolic epoxy coating viscosity-adjusting agent to 40~45cst, then spraying to pre- place
On oil pipe after reason, low-temperature setting, room temperature curing is after surface drying to get the oil arrived for salinity less than 50000ppm water injection well
Effective good antiscale property graphene modified epoxy coating.
7. the oil pipe according to claim 6 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
The preparation method of epoxy coating, which is characterized in that in step 7 low-temperature setting temperature be 50~55 DEG C, soaking time be 2~
2.5h；The normal temperature cure time is 5~6d in step 7.
8. the oil pipe according to claim 6 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
The preparation method of epoxy coating, which is characterized in that gained coating layer thickness is 160~190 μm in step 7.
9. the oil pipe according to claim 6 for being less than 50000ppm water injection well for salinity is modified with good antiscale property graphene
The preparation method of epoxy coating, which is characterized in that the organic solvent being added in the organic solvent and step 5 being added in step 1
Mass ratio is 6:4.
10. the oil pipe good antiscale property graphene according to claim 6 for being less than 50000ppm water injection well for salinity changes
Property epoxy coating preparation method, which is characterized in that the auxiliary agent that is added for the first time in step 3, second of auxiliary agent being added and
The mass ratio for the auxiliary agent being added in step 5 is 3:3:4.
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| CN110922889A (en) * | 2019-12-04 | 2020-03-27 | 上海海隆赛能新材料有限公司 | Wear-resistant anticorrosive paint for inner wall of heat distribution pipeline and preparation method thereof |
| CN111187554A (en) * | 2020-03-05 | 2020-05-22 | 中国石油天然气集团有限公司 | Anticorrosive paint for large-diameter high-temperature-resistant thermal steel pipe and spraying method |
| CN113061387A (en) * | 2021-03-10 | 2021-07-02 | 中国石油天然气集团有限公司 | Anti-scaling coating for oil pipe of water injection well and preparation and use methods thereof |
| CN113773727A (en) * | 2021-09-13 | 2021-12-10 | 四川轻化工大学 | Preparation method of graphene oxide modified epoxy resin coating |
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| CN110922889A (en) * | 2019-12-04 | 2020-03-27 | 上海海隆赛能新材料有限公司 | Wear-resistant anticorrosive paint for inner wall of heat distribution pipeline and preparation method thereof |
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| CN113061387A (en) * | 2021-03-10 | 2021-07-02 | 中国石油天然气集团有限公司 | Anti-scaling coating for oil pipe of water injection well and preparation and use methods thereof |
| CN113061387B (en) * | 2021-03-10 | 2022-11-01 | 中国石油天然气集团有限公司 | Anti-scaling coating for oil pipe of water injection well and preparation and application methods thereof |
| CN113773727A (en) * | 2021-09-13 | 2021-12-10 | 四川轻化工大学 | Preparation method of graphene oxide modified epoxy resin coating |
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Application publication date: 20190628 |