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Acid liquor corrosion inhibitor and preparation thereof

A technology of corrosion inhibitor and acid solution, which is applied in the field of acid solution corrosion inhibitor and oilfield acidification corrosion inhibitor, can solve the problems of unsatisfactory corrosion inhibition performance, high toxicity of propargyl alcohol, incomplete formulation, etc. Low, the corrosion inhibition effect is improved, the effect of reducing the dosage

Active Publication Date: 2006-03-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Literature (Zhong Chuanrong, etc. [J], Fine Petroleum Chemical Industry, 1999, No. 4: 9-10) introduced a corrosion inhibitor containing propynyl alcohol, but due to the high toxicity of propynyl alcohol, the corrosion inhibition performance is not good. ideal, not practical
Literature (Zhong Chuanrong, etc. [J], Oilfield Chemicals, No. 2, 1999: 121-124) introduced a production method of an acidifying corrosion inhibitor containing methylpentynol, but due to imperfections in the composition , the compatibility of each component of the formula is not good, and the performance of the final product can be further improved

Method used

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Experimental program
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Embodiment 1～5

[0027] Add the measured solvent, methyl pentynol, phosphoric acid, and antimony trioxide into the reaction kettle, and stir evenly; after that, heat to the predetermined temperature and keep the temperature constant; after that, start to add triethanolamine dropwise, and within the predetermined time Adding is completed; then, keep the temperature constant and continue to stir at the same time, the stirring speed is 30-100n / min; after that, stop heating, start to cool down naturally, and continue to stir; Efficacy agent (KI), surfactant, stir to obtain the product of the present invention. See Table 1 for the formula ratio of specific operating conditions.

[0028]

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PUM

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Abstract

The invention provides an acid inhibitor, which includes dormison, triethanolamine, phosphoric acid, antimony oxide, the synergistic agent and the soluble solvent. The inhibitor has improved the effect and decreased the cost; it can be used to the all kinds of the acid and major in the oil well acidification.

Description

technical field [0001] The invention relates to an acid corrosion inhibitor, in particular to an oilfield acidification corrosion inhibitor, which belongs to the technical field of metal anticorrosion. Background technique [0002] Acid corrosion inhibitor is a substance that can inhibit metal from being destroyed in acidic medium. Acid corrosion inhibitor is mainly used to prevent hydrochloric acid or earth acid solution from corroding metal equipment and downhole pipe strings during acidizing construction of oil wells, so as to ensure The implementation of oil well acidizing fracturing technology and the realization of technical measures for increasing production and stabilizing production. In the past, when some oil fields used concentrated hydrochloric acid to acidify oil wells, downhole tubing tripping accidents often occurred because there was no good corrosion inhibitor for corrosion protection. Therefore, it is essential to use effective corrosion inhibitors when ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/04
Inventor 艾抚宾王顺农侯学伟王春梅季秀珍王兴彤
Owner CHINA PETROLEUM & CHEM CORP
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