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High-temperature acidic corrosion inhibitor and preparation method thereof

A technology of acidizing corrosion inhibitor and high temperature, which is applied in the field of high temperature acidifying corrosion inhibitor and its preparation, can solve the problems of unstable dissolving and dispersing, formation damage, easy coking, etc., and achieves increasing comprehensive economic benefits, reducing corrosion, and preparing method. simple effect

Inactive Publication Date: 2011-10-26
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the field use, the high-temperature acidification corrosion inhibitors commonly used in China have the disadvantages of easy coking, delamination, and insufficient stability of dissolution and dispersion at high temperatures.
Moreover, high-temperature acidification corrosion inhibitors may also form precipitation in the formation, causing formation damage

Method used

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  • High-temperature acidic corrosion inhibitor and preparation method thereof
  • High-temperature acidic corrosion inhibitor and preparation method thereof
  • High-temperature acidic corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the present invention, aniline is slowly added dropwise to cyclohexanone and paraformaldehyde, and the aldehyde, ketone, and amine condensate is synthesized in the following manner, and the reaction formula is as follows:

[0035]

[0036] details as follows:

[0037] Add 1989Kg of cyclohexanone into the reactor, start the stirrer, keep it at 100r / min, add 147Kg of 31% industrial hydrochloric acid under stirring, and stir for 10min. Slowly add 612Kg of paraformaldehyde, and slowly raise the temperature to control the temperature in the reactor between 60°C and 70°C; after adding the paraformaldehyde, raise the temperature to 85°C and 95°C, and react for 30 minutes. Turn on the circulating cold water, control the temperature of the reactor to 50°C-60°C, slowly add 869Kg of aniline, and then slowly add 83Kg of hydrochloric acid. Slowly raise the temperature of the reactor to 110°C. After the temperature in the reactor reaches 110°C, keep it at the temperature for 1...

Embodiment 2

[0050] The manufacturing process of the semi-finished product A is as described in Example 1. Add 100Kg of the semi-finished product A in the reactor, start the stirrer, stir at a speed of 100r / min, then add 12.0Kg of propynyl alcohol and 10.0Kg of formamide, stir well and then pour out to form a composite acidification corrosion inhibitor (named FHC for ease of description).

[0051] Corrosion inhibition performance evaluation test:

[0052] In different acid liquids, under the condition of the experimental temperature of 90°C, the corrosion inhibition performance of the corrosion inhibitor FHC was evaluated by referring to the People's Republic of China Petroleum and Natural Gas Industry Standard SY / T5405-1996 "Experimental Methods and Evaluation Indexes for Corrosion Inhibitors for Acidification" , the results are shown in Table 2.

[0053] Table 2 Evaluation of corrosion inhibition performance in different acid solutions (at 90°C)

[0054]

[0055] From the experiment...

Embodiment 3

[0057] The manufacturing process of semi-finished product A is as described in embodiment 1, in reactor, add 100.0Kg semi-finished product A, start agitator, stirring speed 100r / min, then add 10.0Kg propynyl alcohol, 10.0Kg potassium iodide, 6.7Kg trichloride respectively Antimony, stir well to form formula 1;

[0058] Or add 100.0Kg semi-finished product A in the reaction kettle, start the stirrer, stir at a speed of 100r / min, then add 10.0Kg propynyl alcohol, 10.0Kg potassium iodide, and 6.7Kg antimony trioxide respectively, and form formula 2 after stirring evenly;

[0059] Or add 100.0Kg semi-finished product A in the reaction kettle, start the agitator, and stir at a speed of 100r / min, then add 10.0Kg propynyl alcohol, 6.7Kg potassium iodide, and 10.0Kg antimony trichloride respectively, and form formula 3 after stirring evenly;

[0060] Or add 100.0Kg semi-finished product A to the reaction kettle, start the agitator, and stir at a speed of 100r / min, then add 10.0Kg prop...

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Abstract

The invention relates to a high-temperature acidic corrosion inhibitor, which is characterized in that the high-temperature acidic corrosion inhibitor comprises the following components in parts by weight: 100 parts of solution containing 40-50 wt% ketone-aldehyde-amine condensate, 3-15 parts of propiolic alcohol, and at least one component selected from potassium iodide, formamide, antimonous oxide and antimonous chloride (wherein potassium iodide is 3-12 parts, formamide is 8-15 parts, antimonous oxide is 3-12 parts, antimonous chloride is 3-12 parts), wherein the solution containing 40-50 wt% ketone-aldehyde-amine condensate is prepared by mixing a ketone-aldehyde-amine and an alcohol solvent of alkylphenol polyoxyethylene based on a ratio of 1: (10-15). The invention also relates to a method for preparing the high-temperature acidic corrosion inhibitor.

Description

technical field [0001] The invention relates to a high-temperature acidification corrosion inhibitor and a preparation method thereof. Background technique [0002] Oil well acidizing process, also known as acid treatment process, refers to the use of mechanical methods to inject a certain amount of acid liquid from the surface through the oil well into the formation, because the acid liquid can dissolve the blocking substances in the formation near the bottom of the well, such as mud plugs, corrosion Certain components in formation rocks cause formation pores and fractures to expand and communicate, increase formation crude oil flow channels, and reduce formation crude oil flow resistance, thereby achieving the purpose of increasing production. However, the injection of acid fluid can cause corrosion of surface steel equipment and downhole tubing. In order to prevent or delay these corrosions, it is generally necessary to add a corrosion inhibitor to the acid solution, tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74
Inventor 张海马喜平陈翔宇冯建建赵强闫杰王一闻
Owner CHINA NAT OFFSHORE OIL CORP
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