A compound low-phosphorus corrosion inhibitor suitable for oilfield systems and its preparation method

A corrosion inhibitor and oilfield technology, applied in the direction of chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of non-environmental protection, not easy to degrade, etc., achieve high corrosion inhibition performance, metal protection, corrosion inhibition Excellent effect

Active Publication Date: 2020-08-21
河南省科学院同位素研究所有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inhibitors are only effective at high concentrations and are not environmentally friendly and prone to degradation

Method used

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  • A compound low-phosphorus corrosion inhibitor suitable for oilfield systems and its preparation method
  • A compound low-phosphorus corrosion inhibitor suitable for oilfield systems and its preparation method
  • A compound low-phosphorus corrosion inhibitor suitable for oilfield systems and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A compound low-phosphorus corrosion inhibitor suitable for oilfield systems, which consists of polyaspartic acid aqueous solution, polyamino polyether group methylene phosphonic acid aqueous solution, N-(3-aminopropyl) imidazole aqueous solution, zinc sulfate aqueous solution Prepared according to the volume ratio of 1:1:1:1;

[0027] Wherein, the concentration of polyaspartic acid aqueous solution is 10mg / L, the concentration of polyaminopolyether group methylene phosphonic acid aqueous solution is 5mg / L, the concentration of N-(3-aminopropyl) imidazole aqueous solution is 50mg / L, The concentration of the zinc sulfate aqueous solution is 2 mg / L.

[0028] The preparation method of this composite low phosphorus corrosion inhibitor specifically carries out according to the following steps:

[0029] Step 1, preparation concentration is the polyaspartic acid aqueous solution of 10mg / L, the polyamino polyether group methylene phosphonic acid aqueous solution that concentrat...

Embodiment 2

[0039] A compound low-phosphorus corrosion inhibitor suitable for oilfield systems, which consists of polyaspartic acid aqueous solution, polyamino polyether group methylene phosphonic acid aqueous solution, N-(3-aminopropyl) imidazole aqueous solution, zinc sulfate aqueous solution Prepared according to the volume ratio of 1:1:1:1;

[0040] Wherein, the concentration of polyaspartic acid aqueous solution is 50mg / L, the concentration of polyaminopolyether group methylene phosphonic acid aqueous solution is 25mg / L, the concentration of N-(3-aminopropyl) imidazole aqueous solution is 50mg / L, The concentration of zinc sulfate aqueous solution is 10mg / L.

[0041] The preparation method of this composite low phosphorus corrosion inhibitor specifically carries out according to the following steps:

[0042] Step 1, preparation concentration is respectively the polyaspartic acid aqueous solution of 50mg / L, the polyamino polyether group methylene phosphonic acid aqueous solution that ...

Embodiment 3

[0052] A compound low-phosphorus corrosion inhibitor suitable for oilfield systems, which consists of polyaspartic acid aqueous solution, polyamino polyether group methylene phosphonic acid aqueous solution, N-(3-aminopropyl) imidazole aqueous solution, zinc sulfate aqueous solution Prepared according to the volume ratio of 1:1:1:1;

[0053] The concentration of polyaspartic acid aqueous solution is 30mg / L, the concentration of polyaminopolyether group methylene phosphonic acid aqueous solution is 25mg / L, the concentration of N-(3-aminopropyl) imidazole aqueous solution is 40mg / L, zinc sulfate The concentration of the aqueous solution was 4mg / L.

[0054] The preparation method of this composite low phosphorus corrosion inhibitor specifically carries out according to the following steps:

[0055] Step 1, preparation concentration is respectively the polyaspartic acid aqueous solution of 30mg / L, the polyamino polyether group methylene phosphonic acid aqueous solution that conce...

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Abstract

Belonging to the technical field of corrosion and protection, the invention relates to a compound low-phosphorus corrosion inhibitor suitable for an oil field system. The compound low-phosphorus corrosion inhibitor is prepared by mixing a polyaspartic acid aqueous solution, a polyamino polyether methylene phosphonate aqueous solution, an N-(3-aminopropyl)imidazole aqueous solution and a zinc sulfate aqueous solution with equal volume. The invention also provides a preparation method of the compound low-phosphorus corrosion inhibitor suitable for an oil field system. The compound low-phosphoruscorrosion inhibitor suitable for an oil field system provided by the invention can meet the production requirements of the oil field, reduce the production cost and effectively protect pipelines andequipment of the oil field system, not only has efficient and stable performance, and good solubility, but also has biodegradability and low environmental toxicity.

Description

technical field [0001] The invention relates to a composite low-phosphorus corrosion inhibitor for oilfield system pipelines and a preparation method thereof, belonging to the technical field of corrosion and protection. Background technique [0002] Corrosion in the oil and gas industry is due to the presence of corrosive substances in crude oil. Oilfield corrosion usually occurs at all stages from downhole to surface equipment and processing facilities. These corrosion problems can cause some or even all processes in the oilfield system to stop, resulting in severe Economic losses. [0003] Acidification of petroleum is one of the technologies in the petroleum production process. Acidizing increases oil production by pumping high-temperature acid into the wellbore to create channels in the rock that allow oil and gas to reach the well and dissolve debris found in older or aging wells to maximize production rates, but acidizing techniques expose wells to It is prone to co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54C08G73/12
CPCC08G73/12C09K8/54
Inventor 王晓慧遆永周杨星范家霖邓刚王强王宏正黎振华华成武李向辉姜亚玲
Owner 河南省科学院同位素研究所有限责任公司
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