Slow-release type solid corrosion inhibitor and preparation method thereof
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A corrosion inhibitor, slow-release technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc. Long release period, high corrosion inhibition efficiency and slow release effect
Active Publication Date: 2016-02-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Abstract
Description
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These special environmental media may have side effects on the added corrosion inhibitors
Some even chemically react with the environmental medium to make it deteriorate, thereby losing its corrosion inhibition effect, and even accelerating the occurrence of corrosion reactions, etc.
Method used
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Effect test
Embodiment 1
[0014] Add 26g of carnauba wax, 26g of gelatinized starch, 17g of polyvinylpyrrolidone, 17g of microcrystalline cellulose, 17g of sodium carboxymethyl starch, and 9g of stearic acid as auxiliary materials, stir and mix evenly, heat to 80°C, and add 10-20ml of distilled water , and continue stirring until the mixture becomes molten. Mix the main ingredients amantadine hydrochloride 36g, diphenhydramine hydrochloride 58g, and dextromethorphan hydrobromide 74g evenly, then slowly add to the molten auxiliary materials, add 10-20ml of distilled water, keep the temperature at 85°C, and keep stirring. Mix the main material and auxiliary materials evenly until they are in a molten state, put them into a mold for compaction, and cool to obtain a block-shaped solid corrosion inhibitor product.
[0015] According to GB10124-88 "Metal Material Laboratory Uniform Corrosion Full Immersion Test Method" in the laboratory, the weight loss test of the hanging piece is carried out. The test solu...
Embodiment 2
[0017] Add 17g of carnauba wax, 17g of gelatinized starch, 11g of polyvinylpyrrolidone, 11g of microcrystalline cellulose, 11g of carboxymethyl starch sodium, and 6g of stearic acid as auxiliary materials, stir and mix evenly, heat to 80°C, and add 10-20ml of distilled water , and continue stirring until the mixture becomes molten. Mix the main ingredients amantadine hydrochloride 36g, diphenhydramine hydrochloride 58g, and dextromethorphan hydrobromide 74g evenly, then slowly add to the molten auxiliary materials, add 10-20ml of distilled water, keep the temperature at 80°C, and keep stirring. Mix the main material and auxiliary materials evenly until they are in a molten state, put them into a mold for compaction, and cool to obtain a block-shaped solid corrosion inhibitor product.
[0018] According to GB10124-88 "Metal Material Laboratory Uniform Corrosion Full Immersion Test Method" in the laboratory, the weight loss test of the hanging piece is carried out. The test solu...
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Abstract
The invention discloses a slow-release type solid corrosion inhibitor and a preparation method thereof. The solid corrosion inhibitor is prepared from the following materials: 60 percent to 70 percent of a main material and 30 percent to 40 percent of an auxiliary material; the main material is formed by compounding three components of amantadine hydrochloride, diphenhydramine hydrochloride and dextromethorphan hydrobromide according to a molar mass ratio of 2 to 2 to 1; the auxiliary material is formed by compounding carnauba wax, pregelatinized starches, polyvinylpyrrolidone, microcrystalline cellulose, carboxymethyl starch sodium and stearic acid according to a mass ratio of 3 to 3 to 2 to 2 to 2 to 1. The preparation method comprises the following steps: after mixing the auxiliary material evenly according to a formula ratio, stirring and heating to 80 DEG C to 90 DEG C, melting the auxiliary material, slowly adding the main material, which is mixed evenly according to a formula ratio, into the molten auxiliary material, continuously stirring and heating, after sufficiently mixing the main material and the auxiliary material evenly, putting into a mould for compression molding, and cooling to obtain a finished product of the solid corrosion inhibitor. The corrosion inhibitor is low in usage amount, long in release period, good in corrosion inhibiting effect, simple in preparation and putting process, and suitable for anticorrosion for an oil well and an underground tube and rod.
Description
technical field [0001] The invention relates to a slow-release solid corrosion inhibitor and a preparation method thereof, in particular to a long-acting slow-release solid corrosion inhibitor for oil and gas well corrosion protection and a preparation method thereof. Background technique [0002] In the process of oil and gas exploration and development, the environment faced by oil and gas fields is getting worse and worse, and the corrosion of oil wells is becoming more and more serious, which has become a major hidden danger affecting the safe production and economic operation of oil fields. In order to solve the corrosion problem in oil fields, people have developed many anti-corrosion technologies. Among them, adding a small amount of corrosion inhibitors to oil wells is an effective measure to reduce oil costs, which can significantly slow down or even prevent the occurrence of corrosion. [0003] At present, adding liquid corrosion inhibitor by injection method is a ...
Claims
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Application Information
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