CN111876076A - Temporary protection water-based paint for sucker rod of oil pumping well and preparation method thereof - Google Patents
Temporary protection water-based paint for sucker rod of oil pumping well and preparation method thereof Download PDFInfo
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- CN111876076A CN111876076A CN202010756925.4A CN202010756925A CN111876076A CN 111876076 A CN111876076 A CN 111876076A CN 202010756925 A CN202010756925 A CN 202010756925A CN 111876076 A CN111876076 A CN 111876076A
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- 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
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
- C09D195/005—Aqueous compositions, e.g. emulsions
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a temporary protection water-based paint for a sucker rod of an oil pumping well and a preparation method thereof, belonging to the technical field of water-based paints. The temporary protection water-based paint for the sucker rod of the oil pumping well comprises: self-emulsified asphalt, acrylic emulsion, water-based dispersing agent, water-based defoaming agent, water-based organic silicon flatting agent, water-based polyamide wax slurry, deionized water, film-forming assistant and graphene slurry. The coating has excellent corrosion resistance, the salt spray resistance can reach 1000h, the adhesive force is grade 1, the impact resistance is 60cm, the water resistance exceeds 720h, and the weather resistance is excellent; when the sucker rod is in a working state, the crude oil temperature is 50-100 ℃, the aqueous acrylic acid modified asphalt coating can be uniformly dissolved in the crude oil, and the conditions of particle and flake falling can not be generated.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to temporary protection water-based paint for a sucker rod of an oil pumping well and a preparation method thereof.
Background
The pumping rod is a slender rod piece for the pumping well, and the upper part is connected with a polish rod and the lower part is connected with an oil well pump to play a role in transmitting power. The sucker rod is made of low carbon alloy steel through quenching and tempering, and is connected with one another in an oil pipe by internal threads to extend to a piston at an underground oil layer, and oil is pumped through reciprocating motion.
The working environment of the steel wire rope sucker rod is very harsh, and the main reasons are as follows: 1. the general oil well contains HS, CO, Cl < - > and sulfate reducing bacteria, and is a multi-element corrosion medium, and different oil fields, different oil wells of the same oil field and different parts of the same oil well have corrosion media with different concentrations; 2. when the sucker rod works, the sucker rod reciprocates up and down to bear the action of alternating tensile load; 3. because the oil well has a certain inclination, sliding friction exists between the steel wire rope and the oil pipe. The sucker rod works in a strong corrosive environment, and the failure of the sucker rod is mainly caused by the damage caused by corrosion; the steel wire rope is made of high-carbon steel, so that the corrosion resistance is poor; the steel wire rope consists of a plurality of steel wires, the structure is sparse, corrosive media can invade the inside of the steel wire rope, each steel wire can be contacted with the corrosive media, and the contact area of the sucker rod of the steel wire rope and the corrosive media is 4.85 times of that of the steel rod. Therefore, the surface protection of the steel wire rope sucker rod is needed.
There are many surface protection methods to wire rope sucker rod in the existing market, like metal coating: a zinc plating layer, a zinc-aluminum alloy layer, hot dip aluminum, and the like; organic coating: fluid bed dip coated plastics, electrostatic coated plastics, hot extrusion coated plastics, and hot extrusion coated plastics, among others. According to the corrosion environment of an oil well, the working condition of a sucker rod and the transportation requirement, the reliability, the practicability and the economical efficiency of the protection process implemented on a long and thin steel wire rope with more than l000 meters are realized, the hot extrusion molding coating plastic and the hot extrusion molding coating plastic are adopted on the basis of analysis and comparison to carry out surface protection on the sucker rod of the steel wire rope, the hot extrusion molding coating plastic is used for body connecting coating, and the hot extrusion molding coating plastic is used for local (such as joint and breakage repair) coating. The hot extrusion coating of plastic is to melt and plasticize the plastic at a certain temperature and pressure, and continuously pass through a hole to form a product with a specific section shape. The hot extrusion molding mainly comprises four processes of feeding, plasticizing, molding and shaping, and the process flow is as follows: wire rope inspection a wire rope derusting a wire rope deoiling a paying off preparation an extruding machine prepares a material preparation a control system action an extrusion molding a coating inspection a take-up packing. Thermal spray coating of plastics is carried out by heating plastic powder with a flame, spraying softened droplets onto a workpiece to be coated which has been preheated to near the melting point of the powder, and fusing the molten powder to build up a coating. Generally, the thermal spray process flow is as follows: the surface of the substrate workpiece is pretreated, one surface is preheated, one plastic spraying (curing) is carried out, and one inspection is carried out on one sloppy layer for repairing.
The above protection methods all have a fatal weakness, the sucker rod is coated by the coating when working, static electricity generated when crude oil is rubbed can not be released, and static sparks are easy to generate. Therefore, the coating on the surface of the sucker rod can only play a temporary protection role, and the coating must be dissolved in crude oil during working and cannot fall off in the form of pieces or blocks, otherwise the normal operation of the pumping unit can be influenced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a temporary protective water-based paint for a sucker rod of an oil pumping well.
In order to achieve the purpose, the invention adopts the following technical scheme:
a temporary protection water-based paint for a sucker rod of an oil pumping well comprises the following raw materials in percentage by weight: 60-78% of self-emulsified asphalt, 15-25% of acrylic emulsion, 0.3-0.5% of water-based dispersant, 0.1-0.2% of water-based defoamer, 0.2-0.5% of water-based organic silicon leveling agent, 0.5-1% of water-based polyamide wax slurry, 4.4-6% of deionized water, 1-3% of film-forming assistant and 0.2-0.5% of graphene slurry; the sum of the weight percentages of all the raw materials is 100 percent.
Further, the self-emulsified asphalt comprises the following components in percentage by weight: 25-35% of asphalt, 62-73% of deionized water, 1-1.5% of cationic emulsifier and 1-1.5% of nonionic emulsifier; the sum of the weight percentages of all the raw materials is 100 percent.
Further, the preparation method of the self-emulsified asphalt comprises the following steps: dissolving a cationic emulsifier and a nonionic emulsifier in deionized water according to the ratio of 1.5:1, uniformly stirring, adjusting the pH value to be below 4 by using hydrochloric acid, then heating to 55 ℃, heating asphalt to 130-140 ℃, pouring the emulsifier mixed solution into a colloid mill for circulation for 10 seconds, then slowly pouring the heated asphalt for circulation for 30 seconds to obtain the emulsified asphalt.
Further, the pH value of the water-based dispersing agent, the water-based defoaming agent, the water-based organic silicon flatting agent, the water-based polyamide wax slurry and the graphene slurry is less than or equal to 7.
The preparation method of the temporary protection water-based paint comprises the following steps:
step 1, adding self-emulsified asphalt and aqueous acrylic resin emulsion into a production cylinder, and stirring for 5-10 minutes at the speed of 400 revolutions per minute by adopting 300-;
step 2, diluting the aqueous dispersant and the aqueous defoaming agent by using deionized water, adding the diluted aqueous dispersant and the aqueous defoaming agent into a production cylinder, and stirring for 5-10 minutes at the speed of 300-400 rpm;
step 3, adding the graphene aqueous solution and the water-based polyamide wax slurry, and stirring for 25-30 minutes at the speed of 800-;
and 4, adding a film forming aid, and adjusting the pH value to 5 by adopting acetic acid to obtain the film forming aid.
The invention utilizes the characteristic of low Tg point of the water-based non-ionic emulsified asphalt to splice the acrylic emulsion (the Tg point is selected between 35 ℃ and 45 ℃), so that the coating is in a cured state under the normal temperature environment. The coating disclosed by the invention has excellent corrosion resistance, the salt spray resistance can reach 1000h, the adhesive force is grade 1, the impact resistance is 60cm, the water resistance exceeds 720h, and the weather resistance is excellent. The corrosion resistance of the coating is not damaged due to the collision of the sucker rod in the transportation process, and the rust in the container marine transportation process is avoided; when the sucker rod is in a working state, the crude oil temperature is 50-100 ℃, the aqueous acrylic acid modified asphalt coating can be uniformly dissolved in the crude oil, and the conditions of particle and flake falling can not be generated.
Drawings
FIG. 1 is a flow chart of the preparation of self-emulsified asphalt of the present invention.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
The formula and the preparation process of the water-based non-ionic self-emulsified asphalt adopted by the embodiment of the invention are as follows:
1. selecting materials: the asphalt with more aromatic components and colloid contents is selected, such as: SK90# petroleum asphalt with softening point at 46 ℃; emulsifier: selecting a cationic slow-breaking emulsifier (W-5); nonionic slow-breaking emulsifier polyoxyethylene sorbitan monooleate (Tween 80); acid: calibrating by adopting hydrochloric acid;
2. the formula is as follows: asphalt: 25-35%, deionized water: 62-73% of cationic slow-breaking emulsifier: 1-1.5%, nonionic emulsifier: 1-1.5% and hydrochloric acid.
3. The process comprises the following steps: dissolving a cationic emulsifier and a nonionic emulsifier in deionized water according to the proportion of 1.5:1, uniformly stirring, adjusting the pH value to be below 4 by using hydrochloric acid, then heating to 55 ℃, heating asphalt to 130-140 ℃, pouring soap liquid into a colloid mill for circulation for 10 seconds, then slowly pouring hot asphalt, and obtaining the emulsified asphalt after circulation for 30 seconds. The flow chart is shown in fig. 1.
The raw materials used for the coatings in the following examples are as follows:
self-emulsifying asphalt (self-made)
Water-borne acrylic resin (6080 Baolijia)
Aqueous polyamide wax syrup (AQH810 Li Ye Li Xin)
Aqueous dispersant (BYK190 BYK)
Water defoamer (810 digao)
Water-based organic silicon flatting agent (4100 Digao)
Graphene paste (FA111 high-pass technology)
Film-forming aid (PDGA Dow)
The formula ratios of the coating components of the embodiments 1 to 3 are as follows:
| example 1 | Example 2 | Example 3 | |
| Self-emulsified asphalt | 65 | 70 | 78 |
| Water-based acrylic resin | 25 | 20 | 15 |
| Aqueous polyamide wax slurry | 1 | 0.8 | 0.5 |
| Aqueous dispersant | 0.5 | 0.4 | 0.3 |
| Aqueous organic silicon flatting agent | 0.2 | 0.5 | 0.3 |
| Aqueous defoaming agent | 0.1 | 0.2 | 0.2 |
| Film forming aidAgent for treating cancer | 3 | 1.6 | 1 |
| Deionized water | 5 | 6 | 4.4 |
| Graphene paste | 0.2 | 0.5 | 0.3 |
| Total up to | 100 | 100 | 100 |
The preparation process of the coating comprises the following steps:
1. adding the self-emulsified asphalt and the water-based acrylic resin emulsion into a production cylinder, and stirring for 5-10 minutes at the speed of 400 revolutions per minute by using 300-;
2. diluting the aqueous dispersant and the aqueous defoaming agent by using deionized water, adding the diluted aqueous dispersant and the aqueous defoaming agent into a production cylinder, and stirring for 5-10 minutes at 300-400 rpm;
3. adding a graphene aqueous solution and water-based polyamide wax slurry, and stirring for 25-30 minutes at the speed of 800-;
4. adding film forming assistant and regulating pH value to about 5 with acetic acid.
And (3) dry plate realization: adjusting the viscosity of the paint liquid to 60-70KU by adopting deionized water, immersing the sucker rod in the paint liquid for 10 seconds, taking out, standing and drying. And meanwhile, adjusting the viscosity to 30-40S (T-4 cup) according to the proportion, spraying the plate, and detecting the physical properties. And (3) placing the physical dry plate in a constant temperature cabinet of 25 ℃ for air drying for 48 hours to detect the conventional performance, and testing the salt spray resistance, the water resistance and the weather resistance after curing for 7 days and testing the paint stripping condition in hot crude oil.
The test results of examples 1 to 3 are as follows:
note 1: high and low temperature resistant cycle alternation test conditions: 80 plus or minus 2 ℃ and 95% RH 4h, 80 ℃ to minus 40 ℃ for 2h (temperature change speed 1 ℃/min), 40 plus or minus 2 ℃ for 4h, 40 ℃ to 80 ℃ and 95% RH 2h (temperature change speed 1 ℃/min), the above 12h is a period, and the sample plate is placed at room temperature for more than 16h for testing after 60 periods of testing are completed.
As can be seen from examples 1-3, when the amount of acrylic emulsion is increased, the hardness of the paint film is increased, but the dissolution time in crude oil at 50 ℃ is longer, when the amount of graphene slurry is increased to 0.5% (see example 2), the salt spray resistance of the paint film is more than 3000h, the impact resistance reaches 60CM, and the dissolution time in crude oil at 50 ℃ is 15 minutes. All cases have good effects of high and low temperature cycle alternation resistance test, artificial aging resistance and dissolution in crude oil at 50 ℃, and the VOC emission by adopting a water-based system is very small. The product has been successfully tested in technical departments of the Shengli oil fields, has very good effect, and can be produced in batches and operated on a machine.
Claims (5)
1. The utility model provides a beam-pumping unit well sucker rod is with interim protection water based paint which characterized in that: comprises the following components in percentage by weight: 60-78% of self-emulsified asphalt, 15-25% of acrylic emulsion, 0.3-0.5% of water-based dispersant, 0.1-0.2% of water-based defoamer, 0.2-0.5% of water-based organic silicon leveling agent, 0.5-1% of water-based polyamide wax slurry, 4.4-6% of deionized water, 1-3% of film-forming assistant and 0.2-0.5% of graphene slurry; the sum of the weight percentages of all the raw materials is 100 percent.
2. The coating of claim 1, wherein: the self-emulsified asphalt comprises the following components in percentage by weight: 25-35% of asphalt, 62-73% of deionized water, 1-1.5% of cationic emulsifier and 1-1.5% of nonionic emulsifier; the sum of the weight percentages of all the raw materials is 100 percent.
3. The coating of claim 2, wherein: the preparation method of the self-emulsified asphalt comprises the following steps: dissolving a cationic emulsifier and a nonionic emulsifier in deionized water according to the ratio of 1.5:1, uniformly stirring, adjusting the pH value to be below 4 by using hydrochloric acid, then heating to 55 ℃, heating asphalt to 130-140 ℃, pouring the emulsifier mixed solution into a colloid mill for circulation for 10 seconds, then slowly pouring the heated asphalt for circulation for 30 seconds to obtain the emulsified asphalt.
4. The coating of claim 1, wherein: the pH value of the water-based dispersing agent, the water-based defoaming agent, the water-based organic silicon flatting agent, the water-based polyamide wax slurry and the graphene slurry is less than or equal to 7.
5. A method of preparing the coating of claim 1, wherein: the method comprises the following steps:
step 1, adding self-emulsified asphalt and aqueous acrylic resin emulsion into a production cylinder, and stirring for 5-10 minutes at the speed of 400 revolutions per minute by adopting 300-;
step 2, diluting the aqueous dispersant and the aqueous defoaming agent by using deionized water, adding the diluted aqueous dispersant and the aqueous defoaming agent into a production cylinder, and stirring for 5-10 minutes at the speed of 300-400 rpm;
step 3, adding the graphene aqueous solution and the water-based polyamide wax slurry, and stirring for 25-30 minutes at the speed of 800-;
and 4, adding a film forming aid, and adjusting the pH value to 5 by adopting acetic acid to obtain the film forming aid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010756925.4A CN111876076A (en) | 2020-07-31 | 2020-07-31 | Temporary protection water-based paint for sucker rod of oil pumping well and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010756925.4A CN111876076A (en) | 2020-07-31 | 2020-07-31 | Temporary protection water-based paint for sucker rod of oil pumping well and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194630A (en) * | 2014-09-15 | 2014-12-10 | 重庆罗兹沃柯交通科技有限公司 | Novel waterproof bonding coating and preparation method thereof |
| US20150259919A1 (en) * | 2014-03-11 | 2015-09-17 | Tamko Building Products, Inc. | Roofing products with carbon fiber substrate |
| CN105694494A (en) * | 2016-03-30 | 2016-06-22 | 徐州卧牛山新型防水材料有限公司 | Emulsified asphalt and preparation method thereof, and water-based substrate treating agent for asphalt waterproof coiled materials and preparation method thereof |
| CN109762467A (en) * | 2018-12-25 | 2019-05-17 | 广西青龙化学建材有限公司 | Modified viscoelastic marine glue of graphene and preparation method thereof |
| CN110358449A (en) * | 2019-06-12 | 2019-10-22 | 黄琳 | A kind of preparation method of rubber asphalt composite water-proof paint |
| CN112592660A (en) * | 2020-05-12 | 2021-04-02 | 成都虹润制漆有限公司 | Temporary protective water-based paint applied to sucker rod of drilling machine and preparation method thereof |
-
2020
- 2020-07-31 CN CN202010756925.4A patent/CN111876076A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150259919A1 (en) * | 2014-03-11 | 2015-09-17 | Tamko Building Products, Inc. | Roofing products with carbon fiber substrate |
| CN104194630A (en) * | 2014-09-15 | 2014-12-10 | 重庆罗兹沃柯交通科技有限公司 | Novel waterproof bonding coating and preparation method thereof |
| CN105694494A (en) * | 2016-03-30 | 2016-06-22 | 徐州卧牛山新型防水材料有限公司 | Emulsified asphalt and preparation method thereof, and water-based substrate treating agent for asphalt waterproof coiled materials and preparation method thereof |
| CN109762467A (en) * | 2018-12-25 | 2019-05-17 | 广西青龙化学建材有限公司 | Modified viscoelastic marine glue of graphene and preparation method thereof |
| CN110358449A (en) * | 2019-06-12 | 2019-10-22 | 黄琳 | A kind of preparation method of rubber asphalt composite water-proof paint |
| CN112592660A (en) * | 2020-05-12 | 2021-04-02 | 成都虹润制漆有限公司 | Temporary protective water-based paint applied to sucker rod of drilling machine and preparation method thereof |
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