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Environment-friendly high-temperature acidizing resistant corrosion inhibitor and preparation method thereof

An acidification corrosion inhibitor, an environment-friendly technology, applied in the field of environment-friendly high-temperature acidification corrosion inhibitor and its preparation, can solve problems such as easy coking, high temperature resistance, strong toxicity, etc., to reduce corrosion rate and increase activation energy Effect

Active Publication Date: 2018-12-21
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

Organic corrosion inhibitors are widely used in acidizing liquid systems because of their high efficiency and economy. The disadvantages are that they are generally highly toxic and not resistant to high temperatures.
[0003] In addition, the currently commonly used anti-high temperature acidification corrosion inhibitors in China have the disadvantages of easy coking, delamination, and insufficient stability of dissolution and dispersion at high temperatures, which can neither protect oil well pipes and downhole metal equipment, but also cause formation damage

Method used

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  • Environment-friendly high-temperature acidizing resistant corrosion inhibitor and preparation method thereof
  • Environment-friendly high-temperature acidizing resistant corrosion inhibitor and preparation method thereof

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preparation example Construction

[0026] The preparation method of described quinoline quaternary ammonium salt comprises the following steps:

[0027] Add quinoline and benzyl chloride to the reactor, stir and heat up to 80°C, then slowly add polyoxyethylene fatty alcohol ether dropwise, continue to heat up to 160°C, add ethanol, keep warm for 3 hours, after the reaction, cool down to room temperature , to obtain quinoline quaternary ammonium salt.

[0028] In one embodiment, the raw materials for the preparation of the imidazole-type quaternary ammonium salt in the main agent of the corrosion inhibitor include diethylenetriamine, benzoic acid, dimethyl carbonate and 1,4-dibromobutane.

[0029] In one embodiment, the diethylenetriamine, the benzoic acid, the dimethyl carbonate and the 1,4 -The molar ratio of dibromobutane is 1:(1.05~1.3):(1~1.2):(0.5~0.6); preferably, the diethylenetriamine, the benzoic acid, the dimethyl carbonate The molar ratio to the 1,4-dibromobutane is 1:1.15:1.05:0.54.

[0030] The ...

Embodiment 1

[0050] An environment-friendly high-temperature acidification corrosion inhibitor, calculated by weight, said environment-friendly high-temperature acidification corrosion inhibitor includes 31 parts of corrosion inhibitor main agent, 8 parts of synergist, 0.8 parts of surfactant, 45 parts of solvent And 6 parts of mercapto acids; the main agent of the corrosion inhibitor includes 8 parts of quinoline quaternary ammonium salts, 7 parts of imidazole type quaternary ammonium salts and 16 parts of Mannich bases; the synergist includes 3 parts of organic acetylenic alcohols and 5 parts plant extracts;

[0051] The surfactant is sodium laurate; the solvent is isopropanol; the mercapto acid is thioglycolic acid; the organic alkynyl alcohol is propynyl alcohol; A mixture of Sophora japonica extract and Rosa roxburghii extract; the weight ratio of the extract of Fangji, the extract of Corydalis Corydalis, the extract of Sophora japonica and the extract of Rosa roxburghii is 1:0.3:0.3:...

Embodiment 2

[0065] An environment-friendly high-temperature acidification corrosion inhibitor, calculated by weight, said environment-friendly high-temperature acidification corrosion inhibitor includes 31 parts of corrosion inhibitor main agent, 8 parts of synergist, 0.8 parts of surfactant, 45 parts of solvent And 6 parts of mercapto acids; the main agent of the corrosion inhibitor includes 8 parts of quinoline quaternary ammonium salts, 7 parts of imidazole type quaternary ammonium salts and 16 parts of Mannich bases; the synergist includes 3 parts of organic acetylenic alcohols and 5 parts plant extracts;

[0066] The raw materials for the preparation of the quinoline quaternary ammonium salt in the main agent of the corrosion inhibitor include quinoline, benzyl chloride, polyoxyethylene fatty alcohol ether and ethanol, the quinoline and the benzyl chloride, the polyoxygen The molar ratio of ethylene fatty alcohol ether to the ethanol is 1:1.2:0.1:1.1;

[0067] The raw materials for ...

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Abstract

The invention provides an environment-friendly high-temperature acidizing resistant corrosion inhibitor and a preparation method thereof. The environment-friendly high-temperature acidizing resistantcorrosion inhibitor comprises the components of, by weight, 10-50 parts of corrosion inhibitor primary agents, 1-10 parts of synergists, 0.5-1.5 parts of surfactants, 40-60 parts of solvents and 5-10parts of mercaptan acid; the corrosion inhibitor primary agent comprises 5-15 parts of polyquinoline quaternary ammonium salt, 5-10 parts of imidazolium quaternary ammonium salt, 10-25 parts of Mannich base; and the synergist comprises 1-5 parts of organic alkynol and 1-10 parts of plant extracts, wherein plant extract comprises one or more of a stephania tetrandra extract, a rhizoma corydalis extract, a sophora flower bud extract and a roxburgh rose extract. The environment-friendly high-temperature acidizing resistant corrosion inhibitor has the excellent performance of environmental protection, high temperature resistance, low damage and the like.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors, in particular, the invention relates to an environment-friendly high-temperature acidification corrosion inhibitor and a preparation method thereof. Background technique [0002] With the deepening of oilfield development, more wells have been drilled in newly invested development blocks. As an important means of enhancing oil recovery, acidizing operation is widely used in production stimulation measures of low-permeability and ultra-low-permeability oilfields. As the well depth increases, the formation temperature increases. When high-concentration acid liquid is injected into the wellbore, the oil well pipe wall in a high temperature state will be in contact with the acid liquid, causing severe acid liquid corrosion, so an acidizing corrosion inhibitor will be added to the acid liquid injection system. Organic corrosion inhibitors are widely used in acidizing liquid systems becau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14
CPCC23F11/14
Inventor 吕乃欣付安庆王博涛付顺勋袁军涛范磊
Owner BC P INC CHINA NAT PETROLEUM CORP
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