Preparation of high-temperature acidification corrosion inhibitor

An acidification corrosion inhibitor and high temperature technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of using at high temperatures that do not reach 150°C-180°C

Active Publication Date: 2010-10-06
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above corrosion inhibitors have certain application effects, but none of them can be used at high temperatures of 150°C-180°C

Method used

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  • Preparation of high-temperature acidification corrosion inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 60 parts of sulfathiazole solution, 15 parts of phenolic resin, 10 parts of dodecyl dimethyl benzyl ammonium chloride, 7 parts of amino polysiloxane, 15 parts of diethylene glycol compound in parts by weight, and add to Dosing in the reactor and stirring for 35 minutes to obtain the product;

[0018] The preparation of the sulfathiazole solution: take 45 parts of 2-aminothiazole and 50 parts of p-nitrobenzenesulfonyl chloride in parts by weight, put them into the reaction kettle and stir, keep the temperature at 40°C, and add 50 parts of sodium bicarbonate after 2.5 hours , Continue to react for 4.5 hours to obtain the solution.

Embodiment 2

[0020] Take 50 parts of sulfathiazole solution, 10 parts of phenolic resin, 14 parts of dodecyl dimethyl benzyl ammonium chloride, 5 parts of aminopolysiloxane, and 20 parts of diethylene glycol in parts by weight. Dosing in the reaction kettle, stirring for 30 minutes to obtain the product;

[0021] The preparation of the sulfathiazole solution: take 50 parts of 2-aminothiazole and 47 parts of p-nitrobenzenesulfonyl chloride in parts by weight, put them into the reactor and stir, keep the temperature at 40°C, and add 45 parts of sodium bicarbonate after 2 hours , Continue to react for 5 hours to obtain the solution.

Embodiment 3

[0023] Take 56 parts of sulfathiazole solution, 12 parts of phenolic resin, 15 parts of dodecyl dimethyl benzyl ammonium chloride, 10 parts of amino polysiloxane, 10 parts of diethylene glycol compound in parts by weight, and add to Dosing in the reaction kettle and stirring for 40 minutes to obtain the product;

[0024] Among them, the preparation of sulfathiazole solution: take 48 parts of 2-aminothiazole and 45 parts of p-nitrobenzenesulfonyl chloride in parts by weight, put them into the reaction kettle and stir, keep the temperature at 40°C, and after 3 hours, add 48 parts of sodium bicarbonate , Continue to react for 4 hours to obtain the solution.

[0025] Verification test:

[0026] In a production well in Xinjiang, the initial oil production was 29 tons per day, but it dropped to 13 tons per day after 2 months. The first measure: mechanical descaling. After the measure, the daily oil output was 23 tons, but the scale was regenerated in a short period of time. So th...

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Abstract

The invention provides preparation of a high-temperature acidification corrosion inhibitor which is prepared from the following components in parts by weight: 50 to 60 parts of sulfathiazole solution, 10 to 15 parts of phenolic resin, 10 to 15 parts of dodecyl dimethyl benzyl ammonium chloride, 5 to 10 parts of aminopolysiloxane and 10 to 20 parts of diethylene glycol; the components for optimalpreparation comprise 60 parts of sulfathiazole, 15 parts of phenolic resin, 10 parts of dodecyl dimethyl benzyl ammonium chloride, 7 parts of aminopolysiloxane and 15 parts of diethylene glycol; and when in preparation, the components are sequentially added into a reaction kettle and stirred for 30 to 40 minutes to obtain the product, wherein the preparation of the sulfathiazole solution comprises the following steps: taking 45 to 50 parts of 2-aminothiazole and 45 to 50 parts of p-nitrobenzene sulfonyl chloride, adding into the reaction kettle, stirring, keeping the constant temperature to 40 DEG C for 2 to 3 hours, then adding 45 to 50 parts of sodium bicarbonate, and continuing to react for 4 to 5 hours to obtain the solution. The product still has good corrosion inhibiting effect and compatibility when used under the acidification condition of 150 to 180 DEG C.

Description

technical field [0001] The invention relates to a high-temperature acidification corrosion inhibitor used in acidification fracturing stimulation production and injection measures of oil field production wells and water injection wells. The prepared agent has excellent corrosion resistance effect and excellent compatibility. Background technique [0002] At present, the acidification corrosion inhibitor mainly refers to the compound of acetylenic alcohol compound and organic nitrogen-containing compound. It can be effectively applied to high temperature environments below 100°C, mainly because the bonds in the triple bond of the alkynyl compound are effectively combined with the metal, so that the triple bond is destroyed, and then polymerized to produce a multilayer polymeric film, while the long chain Nitrogen-containing compounds have a good shielding effect, and the combined use of the two can significantly enhance the corrosion inhibition effect; but the disadvantages o...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 曾凡付王刚唐倩倩
Owner XINJIANG DELAND
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