A kind of gas well water-soluble corrosion inhibitor and preparation method thereof
A water-soluble, corrosion-inhibitor technology, applied in the field of oil and gas well drilling, can solve the problems of the decline of corrosion inhibitor adsorption capacity and anti-corrosion effect, and achieve the effect of less dosage, prevention of local corrosion, and no irritating odor
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Embodiment 1
[0028] Embodiment 1 of the present invention provides a water-soluble corrosion inhibitor for gas wells. According to the mass fraction, its raw materials are composed of 28% of the main agent and 72% of the compound, wherein the main agent is aminobimolecular acid imidazoline; the compound Based on the total mass of the gas well water-soluble corrosion inhibitor, the compound is composed of 10% alkylamine, 4% aromatic thiourea, 12% acrylic acid copolymer, 4% surfactant and 2% solvent.
[0029] Among them, the alkylamine is laurylamine, the aromatic thiourea is phenylthiourea, the acrylic acid copolymer is acrylic acid-hydroxypropyl acrylate copolymer, and the surfactant is polyethylene glycol polyoxyethylene ether PEG-200 , The solvent is ethylene glycol monobutyl ether.
[0030] Concretely, the preparation method of gas well water-soluble corrosion inhibitor comprises the following steps:
[0031] (1) 2-aminosuccinic acid and hydroxyethylethylenediamine are added to the rea...
Embodiment 2
[0040] Embodiment 2 of the present invention provides a water-soluble corrosion inhibitor for gas wells. According to the mass fraction, its raw materials are composed of 20% of the main agent and 80% of the compound, wherein the main agent is amino bimolecular acid imidazoline, compounded Based on the total mass of water-soluble corrosion inhibitors for gas wells, the compound is composed of 10% alkylamine, 6% aromatic thiourea, 10% acrylic acid copolymer, 4% surfactant and 50% solvent.
[0041] Among them, octadecylamine is selected for alkylamine, o-tolylthiourea is selected for aromatic thiourea, acrylic acid-hydroxypropyl acrylate copolymer is selected for acrylic acid copolymer, and polyethylene glycol polyoxyethylene ether PEG- 600, the solvent is dimethyl sulfoxide.
[0042] Concretely, the preparation method of gas well water-soluble corrosion inhibitor comprises the following steps:
[0043] (1) 2-aminosuccinic acid and hydroxyethylethylenediamine are added to the r...
Embodiment 3
[0052] Embodiment 3 of the present invention provides a water-soluble corrosion inhibitor for gas wells. According to the mass fraction, its raw materials are composed of 25% of the main agent and 75% of the compound, wherein the main agent is aminobimolecular acid imidazoline, compounded Based on the total mass of water-soluble corrosion inhibitors for gas wells, the compound is composed of 10% alkylamine, 6% aromatic thiourea, 12% acrylic acid copolymer, 4% surfactant and 43% solvent.
[0053] Among them, the alkylamine is cetylamine, the aryl thiourea is p-methoxyphenyl thiourea, the acrylic acid copolymer is methyl acrylate copolymer, and the surfactant is polyethylene glycol polyoxyethylene ether PEG- 600, the solvent is ethylene glycol monobutyl ether.
[0054] Concretely, the preparation method of gas well water-soluble corrosion inhibitor comprises the following steps:
[0055] (1) 2-aminosuccinic acid and hydroxyethylethylenediamine are added to the reactor according...
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