A kind of anti-corrosion agent for under-scale corrosion of oil field surface gathering and transportation pipeline and preparation method thereof

A technology for gathering and transportation pipelines and corrosion inhibitors, which is applied in the field of anti-corrosion under-scaling corrosion inhibitors for oilfield surface gathering and transportation pipelines and its preparation field, which can solve the problem of aggravating the degree of local corrosion of sediments, increasing the degree of local under-scaling corrosion, and economic losses and other problems, to achieve good corrosion inhibition performance, reduce corrosion, and add less effect

Active Publication Date: 2021-11-02
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

Since regular pigging will lead to the shutdown of pipelines and cause economic losses, the application of corrosion inhibitors has become a more effective and reasonable control method for the under-scaling corrosion caused by deposits
However, if the ground corrosion inhibitor used is not compatible with the working conditions of under-deposit corrosion, it will aggravate the degree of local corrosion under the sediment. For example, relevant research has shown that for metal corrosion under sedimentary sand coverage, conventional imidazoline If the effect of the agent is not good, it will form a corrosion galvanic couple with the metal surface not covered by the deposit, which will aggravate the degree of local under-deposit corrosion and cause serious corrosion perforation

Method used

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  • A kind of anti-corrosion agent for under-scale corrosion of oil field surface gathering and transportation pipeline and preparation method thereof
  • A kind of anti-corrosion agent for under-scale corrosion of oil field surface gathering and transportation pipeline and preparation method thereof
  • A kind of anti-corrosion agent for under-scale corrosion of oil field surface gathering and transportation pipeline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A corrosion inhibitor for preventing under-scaling corrosion of oilfield surface gathering and transportation pipelines, which consists of the following components and their mass percentages:

[0034] Rosin amine polyoxyethylene ether: 0.5%; nano-scale silicon dioxide: 0.1%; sodium tetraborate: 1%; tungstate: 0.5%, wherein the mass ratio of sodium tungstate and ammonium tungstate is 7:1; - Mercaptolauric acid: 5%; epoxysuccinic acid: 6%; ethanol: 2%; balance water.

[0035] Specific preparation method: first add water to the reaction kettle, then dissolve ethanol in water, then add the main agent of corrosion inhibitor, auxiliary agent of corrosion inhibitor, sodium tetraborate, tungstate and α-mercapto lauryl into the reaction kettle Acid and epoxy succinic acid substances were stirred for 2 hours, and the temperature of the reaction kettle was controlled at 50°C to completely dissolve to obtain a yellow transparent liquid product.

[0036] by comparing figure 2 and...

Embodiment 2

[0038] A corrosion inhibitor for preventing under-scaling corrosion of oilfield surface gathering and transportation pipelines, which consists of the following components and their mass percentages:

[0039] Rosin-based imidazoline quaternary ammonium salt: 12%; nano-scale silicon dioxide: 10%; sodium tetraborate: 14%; tungstate: 8%, wherein the mass ratio of sodium tungstate and ammonium tungstate is 7:6; α-mercaptolauric acid: 20%; sodium polyepoxysuccinate: 18%; ethanol: 8%; the balance is water.

[0040] Specific preparation method: first add water to the reaction kettle, then dissolve ethanol in water, then add the main agent of corrosion inhibitor, auxiliary agent of corrosion inhibitor, sodium tetraborate, tungstate and α-mercapto lauryl into the reaction kettle Acid and epoxy succinic acid substances were stirred for 1 hour, and the temperature of the reaction kettle was controlled at 55° C. to completely dissolve to obtain a yellow transparent liquid product.

Embodiment 3

[0042] A corrosion inhibitor for preventing under-scaling corrosion of oilfield surface gathering and transportation pipelines, which consists of the following components and their mass percentages:

[0043] Rosin-based imidazoline quaternary ammonium salt: 7%; nano-scale silicon dioxide: 4%; sodium tetraborate: 9%; tungstate: 3%, wherein the mass ratio of sodium tungstate and ammonium tungstate is 7:2; α-Mercaptolauric acid: 11%; epoxy succinic acid substances: 12%; ethanol: 4%; the balance is water.

[0044] Among them, the succinic acid substance is made by mixing epoxysuccinic acid and sodium polyepoxysuccinate, and the mixing ratio of epoxysuccinic acid and sodium polyepoxysuccinate is 3:1.

[0045] Specific preparation method: first add water to the reaction kettle, then dissolve ethanol in water, then add the main agent of corrosion inhibitor, auxiliary agent of corrosion inhibitor, sodium tetraborate, tungstate and α-mercapto lauryl into the reaction kettle Acid and e...

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Abstract

The invention provides a corrosion inhibitor for preventing under-scaling corrosion of oilfield surface gathering and transportation pipelines and a preparation method thereof. The components of the corrosion inhibitor include 0.5-12 parts of main agent, 0.1-10 parts Nano silica, 1-14 parts of sodium tetraborate, 0.5-8 parts of tungstate, 5-20 parts of α-mercaptolauric acid; the components of the corrosion inhibitor also include ethanol and water, ethanol and The mass ratio of the total mass of water to the main agent is (12-92.9): (0.5-12), and the main agent is rosin amine polyoxyethylene ether or rosin-based imidazoline quaternary ammonium salt. The preparation method is to add ethanol to water, then add the main agent, nano silicon dioxide, sodium tetraborate, tungstate, α-mercaptolauric acid and epoxy succinic acid, and mix the obtained mixed system evenly to obtain oilfield ground The corrosion inhibitor used for anti-corrosion under scale for gathering and transportation pipelines has good corrosion inhibition effect, and realizes the efficient application of environment-friendly nano-scale corrosion inhibitor.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion under scale for oil field development, and specifically relates to a corrosion inhibitor for anti-corrosion under scale for oil field surface gathering and transportation pipelines and a preparation method thereof. Background technique [0002] In the process of oil field development, crude oil is transported through ground pipelines after reaching the ground. However, due to the complex components in crude oil, and some components are also corrosive, when the crude oil flow rate in the ground gathering and transportation pipeline is low 1. When the crude oil in the pipeline has an elevation difference or the crude oil is at the end of the pipeline, it is easy to deposit solid particles such as gravel, corrosion products, clay and insoluble carbonate on the bottom surface of the carbon steel pipeline. These deposits will cause the uneven distribution of pH value, salt solution concentration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/16C23F11/18
CPCC23F11/16C23F11/187
Inventor 吕乃欣尹成先付安庆于宝石罗凯郑瑞李莹计玉冰
Owner BC P INC CHINA NAT PETROLEUM CORP
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