Method for Inhibiting Corrosion of Oil Production Wellbore Inner Wall
A technology for the inner wall of the cylinder and the oil production well, which is applied in the field of corrosion control, can solve the problems of short duration of the corrosion inhibition effect of the corrosion inhibitor, and achieve the effects of strong anti-oxidation ability, good effect, good anti-corrosion ability and mechanical properties
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Embodiment 1
[0042] The production process of the silicon-zirconium composite solution is as follows: dissolve 20g of epoxy siloxane in 200g of ethanol, add 200g of water to the solution, adjust the pH value of the mixed solution to 4-5, and then heat the mixed solution to 20 Hydrolyze at -80°C for 1-6 hours, cool to room temperature, and age for 24 hours to form a silane solution; the heating temperature is preferably 40-70°C, most preferably 60°C, and the hydrolysis time is preferably 2 hours.
[0043] Dissolve 10g of ammonium fluorozirconate in 600ml of water; add 1g of sodium molybdate, 0.5g of boric acid, 0.5g of citric acid and 1g of diethanolamine in sequence to the ammonium fluorozirconate solution.
[0044] Add the ammonium fluozirconate solution into the epoxy siloxane solution, adjust the pH value to 5-6, and stir for 1 hour to obtain a silicon-zirconium composite solution. The solid content of the silicon-zirconium composite solution is preferably 20-40%, and the optimum It is ...
Embodiment 2
[0046] The production process of the silicon-zirconium composite liquid is as follows: dissolve 20g of vinyl siloxane in 200g of ethanol, add 200g of water to the solution, adjust the pH value of the mixed solution to 4-5, and then heat the mixed solution to 20- Hydrolyze at 80°C for 1-6 hours, cool to room temperature, and age for 24 hours to form a silane solution; the heating temperature is preferably 40-70°C, most preferably 60°C, and the hydrolysis time is preferably 2 hours.
[0047]Dissolve 10g of ammonium fluorozirconate in 600ml of water; add 1g of sodium molybdate, 0.5g of boric acid, 0.5g of citric acid and 1g of diethanolamine in sequence to the ammonium fluorozirconate solution.
[0048] Add the ammonium fluorozirconate solution into the vinyl siloxane solution, adjust the pH value to 5-6, and stir for 1 hour to obtain a silicon-zirconium composite solution. The solid content of the silicon-zirconium composite solution is preferably 20-40%, most preferably The use...
Embodiment 3
[0050] Composite corrosion inhibitor is composed of two kinds of corrosion inhibitors (the compounding ratio of corrosion inhibitor 1 and corrosion inhibitor 2 is 1:1, 1:2 or 1:3).
[0051] The production process of corrosion inhibitor 1 is:
[0052] Add 3 kg of alkyl alkenoic acid into the reactor, start stirring and raise the temperature of the reactor to 70°C, slowly add 0.5 kg of polyethylene polyamine into the reactor, then pass nitrogen into the reactor, and slowly raise the temperature of the reactor React at a constant temperature of 120°C for 1 hour, then slowly raise the temperature of the reactor to 180°C for 2 hours, then raise the temperature of the reactor to 230°C for 4 hours, then lower the temperature of the reactor to below 100°C, slowly pour into the reactor Add 0.5 kg of sulfur-based compound, and finally raise the temperature of the reactor to 130°C for 4 hours of constant temperature reaction to obtain corrosion inhibitor 1.
[0053] The molecular struct...
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