Petroleum pipeline paraffin and scale prevention method

Abstract

The invention relates to the technical field of petroleum pipelines, and discloses a petroleum pipeline paraffin and scale prevention method which comprises the following steps: step 1, preparing a component A material and a component B material, and mixing the component A material and the component B material which are backed up; 2, the material of the component A in the step 1 comprises silicon dioxide and aluminum chloride, and the material of the component B in the step 1 comprises deionized water, alcohol and a gel aid; 3, mixing the component material A and the component material B in the step 1, and carrying out a sol-gel reaction to generate a gel mixture; and 4, assembling the gel substance obtained by the mixed reaction in the step 2 into a spraying machine. The component material A and the component material B are mixed and subjected to a sol-gel reaction to generate a wet gel mixture, the wet gel mixture is sprayed to the surface layer of the petroleum pipeline to form the nano-film coating, and the nano-film coating on the surface layer of the petroleum pipeline can achieve a long-time anti-wax and anti-scale effect.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum pipelines, in particular to a method for preventing wax and scaling in petroleum pipelines. Background Art

[0002] With the increasing shortage of energy, my country's oil field development has entered the middle and late stages. Oil and water wells in oil fields are corroded by carbon dioxide, oxygen, hydrogen sulfide, chloride ions, bacteria, wax and scaling, resulting in increasingly serious damage to pipelines and storage tanks. Oil pipelines include oil pipes, casings, and oil and gas pipelines, which are necessary items in the process of oil extraction and transportation. However, wax and scaling corrosion in the current oil field extraction environment has seriously affected the service life and performance of oil pipelines.

[0003] At present, some oil pipes are protected against wax and scale by using stainless steel pipes in harsh corrosive environments. However, stainless steel is expensive and its use conditions are also subject to certain restrictions. It is necessary to select suitable steel grades according to temperature, carbon dioxide, hydrogen sulfide, and chloride content. Some oil pipes are protected against wax and scale by spraying protective coatings on them. However, most spray protective coatings have poor tolerance to environmental changes and ultraviolet rays, and are prone to peeling, shedding, discoloration, and powdering. The coating has a short life and poor use effect. Therefore, we provide an oil pipeline anti-wax and anti-scale method to solve this problem. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for preventing wax and scaling in oil pipelines. The method comprises the steps of mixing component A material and component B material to carry out a sol-gel reaction to generate a wet gel mixture, which is then sprayed onto the surface of the oil pipeline to form a nano-film coating. The nano-film coating has the advantages of being able to exert a long-term anti-wax and anti-scale effect on the surface of the oil pipeline.

[0005] In order to achieve the above-mentioned purpose of anti-wax and anti-scaling treatment of petroleum pipelines, the present invention provides the following technical solution: a method for anti-wax and anti-scaling of petroleum pipelines, comprising the following steps:

[0006] The first step is to prepare the A component material and the B component material by mixing the backup A component material and the B component material;

[0007] In the second step, the component A materials in the step 1 include silicon dioxide and aluminum chloride, and the component B materials in the step 1 include deionized water, alcohol, and a gelling agent;

[0008] Step 3: Mix the A component material and the B component material in step 1 to perform a sol-gel reaction to generate a gel mixture;

[0009] The fourth step is to assemble the gel material obtained by the mixed reaction in step 2 into a sprayer, and then spray the inner and outer surfaces of the oil pipeline product through the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inner and outer surfaces of the oil pipeline to prevent wax and scale on the oil pipeline.

[0010] Furthermore, the weight percentages of the raw materials for manufacturing the gel mixture are: 13% to 27% silicon dioxide, 9% to 12% aluminum chloride, 30% to 35% deionized water, 23% to 25% alcohol, and 11% to 15% gel aid.

[0011] Furthermore, the aluminum chloride and a mixed solvent of deionized water and alcohol are hydrolyzed to form aluminum sol.

[0012] Furthermore, the silicon dioxide and a mixed solvent of deionized water and alcohol are hydrolyzed to form silica sol.

[0013] Furthermore, the aluminum sol and the silica sol are mixed and stirred, and then an aqueous resin is added and mixed to form a wet gel mixture.

[0014] Furthermore, the gelling aid is selected from water-based resin materials.

[0015] Furthermore, the spraying thickness of the wet gel is 0.01 to 0.4 mm.

[0016] Compared with the prior art, the present invention provides a method for preventing wax and scaling in petroleum pipelines, which has the following beneficial effects:

[0017] 1. The anti-wax and anti-scaling method for oil pipelines is to mix the A component material and the B component material to carry out a sol-gel reaction to generate a wet gel mixture, and the wet gel has a unique Si-O-Al bond structure. The wet gel is hydrolyzed and solidified at room temperature to form a layer of paint film similar to ceramics and glass, that is, a nano-film coating. The nano-film coating effectively improves the strong tolerance to environmental changes and ultraviolet rays over a very long period of time, and effectively plays the effect of not peeling, not falling off, not changing color, and not powdering. It is acid and alkali resistant, acid and alkali resistant, highly wear resistant, corrosion resistant, hydrophobic and oleophobic, self-cleaning, long-term antibacterial, antistatic and green environmental protection. Therefore, after being sprayed on the surface of the oil pipeline, it can play a long-term anti-wax and anti-scaling effect, effectively improve the service life of the oil pipeline, and then effectively improve the use effect.

[0018] 2. The anti-wax and anti-scaling method for petroleum pipelines can be mixed and stirred on site through component A material and component B material. The process is environmentally friendly and has zero emissions. The process is simplified and efficient. The construction is simple during spraying, and no heating is required during spraying. The materials are highly compatible with other paints and are easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the method flow of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the silicon-oxygen-aluminum fragment, which is the main component of the nano-film coating of the present invention;

[0021] Figure 3 This is a schematic diagram of the network structure formed by the main component of the nano-film coating of the present invention, silicon oxide aluminum film;

[0022] Figure 4 It is a schematic diagram comparing the performance of the nano coating material of the present invention with various materials. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1-4 As shown, a method for preventing wax and scaling in petroleum pipelines comprises the following steps:

[0026] The first step is to prepare the A component material and the B component material by mixing the backup A component material and the B component material;

[0027] In the second step, the component A materials in step one include silicon dioxide and aluminum chloride, and the component B materials in step one include deionized water, alcohol, and a gelling aid, and the gelling aid is selected from a water-based resin material, which is convenient and effective for providing a gelling aid effect in the subsequent step;

[0028] Step 3: Mix the A component material and the B component material in step 1 to perform a sol-gel reaction to generate a gel mixture;

[0029] The fourth step is to assemble the gel material obtained by the mixed reaction in step 2 into a sprayer, and then spray the inner and outer surfaces of the oil pipeline product through the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inner and outer surfaces of the oil pipeline to prevent wax and scale on the oil pipeline. The spraying thickness of the wet gel is 0.01 to 0.4 mm, which is convenient for spraying according to the actual thickness of the finished product, effectively improving the efficiency of anti-wax and anti-scale on the oil pipeline, and effectively increasing the cost performance.

[0030] Example 2

[0031] See also Figure 1-4As shown, according to the weight percentage of raw materials for manufacturing the gel mixture, silicon dioxide 13% to 27%, aluminum chloride 9% to 12%, deionized water 30% to 35%, alcohol 23% to 25%, and gelling agent 11% to 15%, this embodiment prepares 13g of silicon dioxide, 12g of aluminum chloride, 35g of deionized water, 25g of alcohol, and 15g of gelling agent (water-based resin) according to the weight percentage of the raw materials.

[0032] First, 35 g of deionized water and 25 g of alcohol were stirred into a mixed solvent;

[0033] Then, 12 g of aluminum chloride and 25 g of a mixed solvent were subjected to a hydrolysis reaction to generate aluminum sol;

[0034] Then, a silica sol is generated by a hydrolysis reaction between 13 g of silicon dioxide and 35 g of a mixed solvent;

[0035] Then, silica sol and aluminum sol are mixed and stirred, and then 15g of aqueous resin is added to mix and perform sol-gel reaction, and finally a wet gel is generated;

[0036] Finally, the wet gel is assembled into a sprayer, and then the inside and outside of the oil pipeline product are sprayed by the sprayer. After the sprayed gel is cured, a layer of nanofilm coating is formed on the inside and outside of the oil pipeline. The chemical components of the nanofilm coating are Si (silicon), O (oxygen), Al (aluminum), C (carbon) H (hydrogen), etc., among which the silicon oxide aluminum of the tetravalent carbon structure forms an ultra-large π and a unique Si-O-Al bond structure when the oxygen bond is opened. The nanofilm coating is a wet gel that is hydrolyzed and cured at room temperature to form a paint film similar to ceramics and glass. The sol-gel reaction process generated by the wet gel is not a simple physical mixture between substances, but a new compound is formed through chemical bonds. The material has effectively improved its strong tolerance to environmental changes and ultraviolet rays over a very long period of time, and effectively does not peel, fall off, discolor, or powder. The nano-film coating has no change after being immersed in 98% sulfuric acid, 35% nitric acid, and 20% sodium carbonate for 24 hours. It has acid and alkali resistance, and the high temperature resistance reaches above 1200℃. The neutral salt spray time reaches 5000 hours, and it has corrosion resistance. The surface hardness of the nano-film coating exceeds 7H, which is several times the standard of fluorocarbon coatings; the friction coefficient reaches 800LMIL, which is 20 times the standard of fluorocarbon coatings, and has high wear resistance. The contact angle with water reaches 120°, which has hydrophobic and oleophobic effects, realizes anti-wax and anti-scale, has self-cleaning effect, and has long-term antibacterial, inhibits mold growth, prevents microbial corrosion and anti-static effects. It is green and environmentally friendly, meets EU standards, and can play a long-term anti-wax and anti-scale effect after being sprayed on the surface of the oil pipeline, thereby effectively improving the use effect.

[0037] Example 3

[0038] See also Figure 1-4 As shown, the difference between this embodiment and embodiment 2 is that: according to the weight percentage of raw materials for manufacturing the gel mixture in this embodiment, silicon dioxide 13% to 27%, aluminum chloride 9% to 12%, deionized water 30% to 35%, alcohol 23% to 25%, and gelling agent 11% to 15%, this embodiment prepares 20g of silicon dioxide, 10g of aluminum chloride, 33g of deionized water, 24g of alcohol, and 13g of gelling agent (water-based resin) according to the weight percentage of the raw materials.

[0039] First, 33 g of deionized water and 24 g of alcohol were stirred to form a mixed solvent;

[0040] Then, 10 g of aluminum chloride and 20 g of a mixed solvent are subjected to a hydrolysis reaction to generate aluminum sol;

[0041] Then, a silica sol is generated by a hydrolysis reaction between 20 g of silicon dioxide and 37 g of a mixed solvent;

[0042] Then, silica sol and aluminum sol were mixed and stirred, and then 13 g of aqueous resin was added to mix and perform sol-gel reaction, and finally a wet gel was generated;

[0043] Finally, the wet gel is assembled into a sprayer, and then the inside and outside of the oil pipeline product are sprayed by the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inside and outside of the oil pipeline, which can play a long-term anti-wax and anti-fouling effect on the surface of the oil pipeline, thereby effectively improving the use effect.

[0044] Example 4

[0045] See also Figure 1-4 As shown, the difference between this embodiment and embodiment 2 is that: according to the weight percentage of raw materials for manufacturing the gel mixture in this embodiment, silicon dioxide 13% to 27%, aluminum chloride 9% to 12%, deionized water 30% to 35%, alcohol 23% to 25%, and gelling agent 11% to 15%, this embodiment prepares 24g of silicon dioxide, 9g of aluminum chloride, 32g of deionized water, 23g of alcohol, and 12g of gelling agent (water-based resin) according to the weight percentage of the raw materials.

[0046] First, 30 g of deionized water and 23 g of alcohol were stirred to form a mixed solvent;

[0047] Then, 9 g of aluminum chloride and 16 g of a mixed solvent were subjected to a hydrolysis reaction to generate aluminum sol;

[0048] Then, a silica sol is generated by a hydrolysis reaction between 24 g of silicon dioxide and 39 g of a mixed solvent;

[0049] Then, silica sol and aluminum sol are mixed and stirred, and then 12g of aqueous resin is added to mix and perform sol-gel reaction, and finally a wet gel is generated;

[0050] Finally, the wet gel is assembled into a sprayer, and then the inside and outside of the oil pipeline product are sprayed by the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inside and outside of the oil pipeline, which can play a long-term anti-wax and anti-fouling effect on the surface of the oil pipeline, thereby effectively improving the use effect.

[0051] Example 5

[0052] See also Figure 1-4 As shown, the difference between this embodiment and embodiment 2 is that: according to the weight percentage of raw materials for manufacturing the gel mixture in this embodiment, silicon dioxide 13% to 27%, aluminum chloride 9% to 12%, deionized water 30% to 35%, alcohol 23% to 25%, and gelling agent 11% to 15%, this embodiment prepares 27g of silicon dioxide, 9g of aluminum chloride, 30g of deionized water, 23g of alcohol, and 11g of gelling agent (water-based resin) according to the weight percentage of the raw materials.

[0053] First, 30 g of deionized water and 23 g of alcohol were stirred to form a mixed solvent;

[0054] Then, 9 g of aluminum chloride and 14 g of a mixed solvent were subjected to a hydrolysis reaction to generate aluminum sol;

[0055] Then, a silica sol is generated by a hydrolysis reaction between 27 g of silicon dioxide and 39 g of a mixed solvent;

[0056] Then, silica sol and aluminum sol are mixed and stirred, and then 11g of aqueous resin is added to mix and perform sol-gel reaction, and finally a wet gel is generated;

[0057] Finally, the wet gel is assembled into a sprayer, and then the inside and outside of the oil pipeline product are sprayed by the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inside and outside of the oil pipeline, which can play a long-term anti-wax and anti-fouling effect on the surface of the oil pipeline, thereby effectively improving the use effect.

[0058] In summary: the present invention performs a sol reaction on the aluminum chloride of the A component material and the mixed solvent of the deionized water and alcohol of the B component material to generate an aluminum sol, and performs a sol reaction on the silicon dioxide of the A component material and the mixed solvent of the deionized water and alcohol of the B component material to generate a silica sol, and then mixes the mixed solution of the silica sol and the aluminum sol with an aqueous resin to form a wet gel mixture, and the A component material and the B component material can be mixed and stirred on site, the process is environmentally friendly and has zero emissions, and the process is simplified and efficient, the construction is simple during spraying, and no heating is required for spraying, and the material is highly compatible, compatible with other paints, and easy to use, and the generated wet gel has a unique Si-O-Al bond structure, and the wet gel is hydrolyzed and solidified at room temperature to form a layer of paint film similar to ceramics and glass, that is, a nanofilm coating, and the nanofilm coating effectively improves the strong tolerance to environmental changes and ultraviolet rays over a very long period of time, and effectively plays a role The nano-membrane coating has no peeling, no falling off, no discoloration and no powdering effect. The nano-membrane coating remains unchanged after being immersed in 98% sulfuric acid, 35% nitric acid and 20% sodium carbonate for 24 hours. It is acid and alkali resistant, and its high temperature resistance reaches above 1200℃. It can pass the neutral salt spray time of 5000 hours and has corrosion resistance. The surface hardness of the nano-membrane coating exceeds 7H, which is several times the standard of fluorocarbon coating. The friction coefficient reaches 800LMIL, which is 20 times the standard of fluorocarbon coating. It has high wear resistance, and the contact angle with water reaches 120°, which has hydrophobic and oleophobic effects, realizes anti-wax and anti-scaling, has self-cleaning effect, and has long-term antibacterial effect, inhibits mold growth, prevents microbial corrosion and anti-static effect. It is green and environmentally friendly, meets EU standards, and can play a long-term anti-wax and anti-scaling effect after being sprayed on the surface of the oil pipeline, effectively prolonging the service life of the oil pipeline, thereby effectively improving the use effect.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preventing wax and scaling in petroleum pipelines, characterized in that: The following steps are involved: The first step is to prepare the A component material and the B component material by mixing the backup A component material and the B component material; In the second step, the component A materials in the step 1 include silicon dioxide and aluminum chloride, and the component B materials in the step 1 include deionized water, alcohol, and a gelling agent; Step 3: Mix the A component material and the B component material in step 1 to perform a sol-gel reaction to generate a gel mixture; The fourth step is to assemble the gel material obtained by the mixed reaction in step 2 into a sprayer, and then spray the inner and outer surfaces of the oil pipeline product through the sprayer. After the sprayed gel is solidified, a layer of nano-film coating is formed on the inner and outer surfaces of the oil pipeline to prevent wax and scale on the oil pipeline.

2. The method for preventing wax and scaling in petroleum pipelines according to claim 1, characterized in that: The weight percentages of the raw materials for manufacturing the gel mixture are: 13% to 27% of silicon dioxide, 9% to 12% of aluminum chloride, 30% to 35% of deionized water, 23% to 25% of alcohol, and 11% to 15% of a gel aid.

3. The method for preventing wax and scaling in petroleum pipelines according to claim 2, characterized in that: The aluminum chloride and the mixed solvent of deionized water and alcohol are hydrolyzed to form aluminum sol.

4. The method for preventing wax and scaling in petroleum pipelines according to claim 3, characterized in that: The silicon dioxide and the mixed solvent of deionized water and alcohol are hydrolyzed to form silica sol.

5. The method for preventing wax and scaling in petroleum pipelines according to claim 4, characterized in that: The aluminum sol and the silica sol are mixed and stirred, and then the aqueous resin is added and mixed to form a wet gel mixture.

6. The method for preventing wax and scaling in petroleum pipelines according to claim 5, characterized in that: The gelling aid is selected from water-based resin materials.

7. The method for preventing wax and scaling in petroleum pipelines according to claim 6, characterized in that: The spraying thickness of the wet gel is 0.01-0.4 mm.

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