Water-soluble corrosion inhibitor for resisting hydrogen sulfide

A technology of resistance to hydrogen sulfide and corrosion inhibitor, applied in wellbore/well components, earthwork drilling and other directions, can solve the problems of low corrosion inhibition rate, unsatisfactory corrosion inhibition performance, easy failure, etc., to improve the corrosion inhibition rate, Good compatibility and anti-corrosion effect

Active Publication Date: 2013-11-27
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. The corrosion inhibitors of the above invention are only suitable for low-temperature corrosion environments, and are prone to failure when used in high-temperature (≥120°C) corrosion environments in oil and gas wells;
[00...

Method used

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  • Water-soluble corrosion inhibitor for resisting hydrogen sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 20g of heptadecyl hydroxyethyl imidazoline, 20g of sodium benzoate, 10g of zinc sulfate heptahydrate, 10g of sodium molybdate, and 40g of water, and stir evenly to prepare water-soluble corrosion inhibitor 1.

Embodiment 2

[0027] Mix 25g of heptadecyl hydroxyethyl imidazoline, 15g of sodium benzoate, 10g of zinc sulfate heptahydrate, 10g of sodium molybdate, and 30g of water, and stir evenly to prepare water-soluble corrosion inhibitor 2.

Embodiment 3

[0029] Mix 30g of heptadecyl hydroxyethyl imidazoline, 20g of sodium benzoate, 10g of zinc sulfate heptahydrate, 10g of sodium molybdate, and 30g of water, and stir evenly to prepare water-soluble corrosion inhibitor 3.

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PUM

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Abstract

The invention discloses a water-soluble corrosion inhibitor for resisting hydrogen sulfide, and relates to the technical field of chemical agent formulations for an oil field. The water-soluble corrosion inhibitor comprises the following materials in mass concentration: 20%-30% of heptadecyl ethoxyl imidazoline, 10%-20% of sodium benzoate, 5%-10% of zinc vitriol, 5%-10% of sodium molybdate and 30%-60% of water. The water-soluble corrosion inhibitor disclosed by the invention has the characteristics of small usage amount, low cost, no environment pollution, good protection effect in a water phase, good inhibition capacity on hydrogen brittleness caused by H2S, very good compatibility with the conventional chemical agent for the oil field, and the like.

Description

[0001] technical field [0002] The invention relates to the technical field of chemical formulations for oilfields, and is mainly used for slowing down the corrosion of oil well bores caused by high-salinity oilfield production water containing hydrogen sulfide and sulfide. Background technique [0003] Some blocks in Changqing Oilfield have high hydrogen sulfide content. Hydrogen sulfide not only causes sudden sulfide stress cracking of metal materials, causing huge economic losses, but also causes environmental pollution due to the toxicity of hydrogen sulfide, directly threatening personal safety. Therefore, in view of the corrosion characteristics and problems of hydrogen sulfide in Changqing Oil and Gas Field, it is urgent to develop a series of high-efficiency sulfur-resistant corrosion inhibitors suitable for the current situation of Changqing Oil and Gas Field to solve the corrosion problems of oil and gas wells and gathering and transportation systems in Changqing O...

Claims

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Application Information

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IPC IPC(8): C09K8/54
Inventor 张新发郭亮李世勇徐军吴保玉薛斌陈怀兵
Owner BC P INC CHINA NAT PETROLEUM CORP
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