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Propynylamine high-temperature acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and propargyl amine, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., can solve the problems of inconvenience in downstream production, and achieve short reaction time, low reaction temperature and low production cost. Reduced effect

Inactive Publication Date: 2015-07-01
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the widely used high-temperature corrosion inhibitors contain inorganic components such as chromate and molybdate. Many of these components can poison the catalysts in downstream refining and chemical industry, which will cause inconvenience to downstream production

Method used

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  • Propynylamine high-temperature acidizing corrosion inhibitor and preparation method thereof
  • Propynylamine high-temperature acidizing corrosion inhibitor and preparation method thereof
  • Propynylamine high-temperature acidizing corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 8.4g 2-methyl-3-butyn-2-ol, 7g n-butylamine, 5.8g propionaldehyde, 0.5g cuprous bromide, 5g potassium iodide, 10g octadecyl ammonium chloride into the reactor and dissolve In 80g of water, react in an ultrasonic cleaner at 25°C for 1 hour to obtain propargylamine high-temperature acidification corrosion inhibitor A.

Embodiment 2

[0035] Add 8.4g 2-methyl-3-butyn-2-ol, 3g ethylenediamine, 11g 40% acetaldehyde solution, 0.5g cuprous bromide, 5g potassium iodide, 10g octadecyl polyoxyethylene ether to the reaction and dissolved in 80g of water, and reacted for 1 hour in an ultrasonic cleaner at 25°C to obtain propargylamine high-temperature acidification corrosion inhibitor B.

Embodiment 3

[0037] Add 8.4g 2-methyl-3-butyn-2-ol, 3g ethylenediamine, 5.8.g propionaldehyde, 1g cuprous bromide, 5g potassium iodide, 10g cetyl ammonium chloride into the reactor and dissolve In 80g of water, react in an ultrasonic cleaner at 25°C for 1.5h to obtain propargylamine high-temperature acidification corrosion inhibitor C.

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Abstract

The invention discloses a propynylamine high-temperature acidizing corrosion inhibitor and a preparation method thereof. The propynylamine high-temperature acidizing corrosion inhibitor is prepared by the following steps: by taking propargyl alcohol, organic amine and aldehyde as raw materials and a cuprous salt as a catalyst, carrying out mannich reaction within a relatively short time under promotion of ultrasonic waves to synthesize propynylamine compounds; and compounding the propynylamine compounds with potassium iodide and a surfactant. The corrosion inhibitor is a yellow or brown emulsion and is stable and uniform, can be well dispersed in an acidic liquid and can give play to a good corrosion inhibiting effect under the condition of a high temperature from 100-140 DEG C, so that the propynylamine high-temperature acidizing corrosion inhibitor is effectively prevented being corroded in the acidizing process. In addition, the corrosion inhibitor disclosed by the invention is prepared by using an ultrasonic wave synthetic method and has the characteristics of being low in synthetic temperature, short in time, high in reaction yield and the like.

Description

technical field [0001] The invention belongs to the technical field of oilfield production increase transformation, and in particular relates to a propargyl amine high-temperature acidification corrosion inhibitor and a preparation method thereof. Background technique [0002] Oil well acidification is an important measure to improve the economic benefits of oilfield development, that is, inject acid solution into the formation through pressure equipment, use the acid solution to dissolve the rock, expand the seepage channel of the oil layer rock, and dissolve the blockage or blockage in the seepage channel Manufacture artificial cracks to make oil and gas passages unimpeded. However, the process of injecting acid liquid into the formation will cause serious corrosion of surface pipelines and wellbore pipe walls, so corrosion inhibitors must be added to the acid liquid. With the development of drilling technology and advances in oil recovery technology, a large number of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/54C23F11/14
Inventor 尹光伟王林张世林任秋军曹宁马金良
Owner CNPC BOHAI DRILLING ENG
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