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Environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines and preparation method thereof

A technology for gathering and transportation pipelines and corrosion inhibitors, which is applied in the field of environment-friendly oxygen-resistant corrosion inhibitors for oil field surface gathering and transportation pipelines and its preparation, can solve the problems of unfavorable human beings and the environment, high toxicity, etc., and achieve the purpose of inhibiting metal corrosion and easily non-toxic effect

Active Publication Date: 2018-11-16
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

[0003] In addition, in the corrosion inhibitor family, many compounds have excellent corrosion inhibition performance. However, their high toxicity is harmful to humans and the environment. Therefore, the safety and environmental impact of corrosion inhibitors have become global concerns.

Method used

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  • Environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines and preparation method thereof

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preparation example Construction

[0031] The preparation method of described imidazole type quaternary ammonium salt, comprises the following steps:

[0032] (1) Add benzoic acid, xylene, and zinc particle catalyst to the reactor, stir evenly, slowly add diethylenetriamine dropwise, after the dropwise addition, slowly raise the temperature to 140°C, keep the temperature for 2 hours, and then raise the temperature to 180°C , heat preservation reaction for 6 hours, after the reaction is completed, the xylene is concentrated and dried under reduced pressure; the weight ratio of the benzoic acid, the xylene and the zinc particles is 1:8:0.002;

[0033](2) Add dimethyl carbonate to the product obtained in step (1), raise the temperature to 85°C, keep the temperature for 5 hours, then add 1,4-dibromobutane, keep the temperature for 5 hours, after the reaction, cool down to room temperature Add acetone, heat up to 60°C, keep warm for 1h, cool down to 0-5°C, keep warm for 1h, filter, and dry under reduced pressure to ...

Embodiment 1

[0048] The environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering and transportation pipelines, in parts by weight, at least includes 32 parts of corrosion inhibitor main agent, 7 parts of synergist, 1 part of surfactant, 45 parts of solvent, 13 parts of amino acid and 5 parts of amino acid Part oxygen scavenger; The main agent of the corrosion inhibitor includes 15 parts of imidazole type quaternary ammonium salts and 17 parts of Mannich bases in parts by weight; the synergist includes 3 parts of organic acetylenic alcohols and 4 parts plant extract; said amino acid is a mixture of cysteine, L-lysine and L-histidine, said cysteine, said L-lysine and said L-histidine The weight ratio of the acids is 1:0.6:0.3; the plant extract is a mixture of Fangji extract, banyan leaf extract, mugwort extract and lettuce extract, the Fangji extract, the banyan leaf extract, The weight ratio of the mugwort extract to the lettuce extract is 1:0.3:0.3:1.2; the...

Embodiment 2

[0057] The environment-friendly oxygen-resistant corrosion inhibitor for the oil field ground gathering and transportation pipeline, in parts by weight, at least includes 32 parts of corrosion inhibitor main agent, 7 parts of synergist, 1 part of surfactant, 45 parts of solvent, 13 parts of amino acid and 5 parts of oxygen scavenger; the main agent of the corrosion inhibitor includes 15 parts of imidazole type quaternary ammonium salt and 17 parts of Mannich base by weight; the synergist includes 3 parts of organic alkyne Alcohol and 4 parts of plant extracts; the amino acid is a mixture of cysteine, L-lysine and L-histidine, the cysteine, the L-lysine and the L- The weight ratio of histidine is 1:0.2:0.1; the plant extract is a mixture of Fangji extract, banyan leaf extract, mugwort extract and lettuce extract, the Fangji extract, the banyan leaf extract The weight ratio of the mugwort extract and the lettuce extract is 1:0.3:0.3:1.2; the raw materials for the preparation of ...

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Abstract

The invention discloses an environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines and a preparation method thereof. The environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines at least includes 10-50 parts of a corrosion inhibitor main agent, 1-10 parts of a synergist, 0.5-1.5 parts of a surfactant, 40-60 partsof a solvent, 5-25 parts of amino acid, and 2-10 parts of a deoxidant. The corrosion inhibitor main agent comprises: 5-20 parts of an imidazole quaternary ammonium salt, and 10-25 parts of Mannich base. The synergist comprises 1-5 parts of organic alkynol, and 1-10 parts of a plant extract. Specifically, the plant extract includes one or more of a radix stephaniae tetrandrae extract, a banyan leafextract, an artemisia argyi extract, a lettuce extract and a roxburgh rose extract. The environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines provided bythe invention has the excellent performance of environmental protection and low damage.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors, in particular to an environment-friendly oxygen-resistant corrosion inhibitor for oil field surface gathering and transportation pipelines and a preparation method thereof. Background technique [0002] With the application of various oilfield stimulation measures and the inevitable existence of an oxygen exposure environment in the ground gathering and transportation process, the oxygen in the air enters the ground gathering and transportation pipeline. This increases the dissolved oxygen content (the dissolved oxygen content can reach about 4PPM) in the production fluid with high salinity. The conventional practice is to add an oxygen scavenger to remove oxygen, and then add a corrosion inhibitor to slow down the corrosion of the pipeline. However, the amount of oxygen scavenger added is large, the cost is high and the effect is unstable. On the other hand, after the production f...

Claims

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Application Information

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IPC IPC(8): C23F11/14
CPCC23F11/149
Inventor 吕乃欣胡建国张小龙郭刚庞永莉马勇王青
Owner BC P INC CHINA NAT PETROLEUM CORP
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