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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

Active Publication Date: 2022-01-04
西安三维科技发展有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a water-soluble corrosion inhibitor for gas wells and a preparation method thereof, which are used to solve the problems that the existing imidazoline corrosion inhibitors in gas well oil pipes have decreased adsorption capacity and obvious anti-corrosion effect due to the increase in temperature.

Method used

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  • A kind of gas well water-soluble corrosion inhibitor and preparation method thereof
  • A kind of gas well water-soluble corrosion inhibitor and preparation method thereof
  • A kind of gas well water-soluble corrosion inhibitor and preparation method thereof

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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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Abstract

The invention discloses a water-soluble corrosion inhibitor for gas wells and a preparation method thereof. According to the mass fraction, the raw material is composed of 20-30% of a main agent and 70-80% of a compound, wherein the main agent is an amino bimolecular Acid imidazoline, the compound is based on the total mass of gas well water-soluble corrosion inhibitor, and the compound is composed of 10‑12% alkylamine, 4‑6% aromatic thiourea, 10‑15% acrylic acid copolymer, 2‑4 %surfactant, 33‑54% solvent composition. In the present invention, amino dimolecular acid imidazoline can contain CO 2 Excellent protection for carbon steel tubing and equipment in gas well environments. The product has good water solubility, no emulsification of condensate oil, excellent anti-corrosion effect, no irritating smell, less dosage, high corrosion inhibition efficiency, and dense adsorption film in the application process of gas wells containing high salinity water Uniformity, can prevent localized corrosion and so on.

Description

technical field [0001] The invention relates to the corrosion of iron metal in oil and gas well drilling, production and storage, belongs to the technical field of oil well and equipment protection in the petroleum and petrochemical field, and more specifically relates to a water-soluble corrosion inhibitor for gas wells and a preparation method thereof. Background technique [0002] Corrosion of metals in oil and gas well drilling and production systems is a serious problem due to the presence of H in injected and produced water 2 S, O 2 , CO 2 , organic acids, inorganic acids and salts aggravate the corrosion behavior. This leads to accelerated corrosion. [0003] Although many substances have been developed over the years to inhibit corrosion in drilling, production and storage systems, there is still a need to develop new corrosion inhibitors. [0004] Corrosion inhibitors protect oil and gas well equipment. The main anti-corrosion principle is that the organic subst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/10C23F11/14
CPCC23F11/10C23F11/149
Inventor 张磊贺华镭苟利鹏杨金峰张进科陈岑李欢吴阳李乐徐磊丁平平
Owner 西安三维科技发展有限责任公司
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