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Oil field inhibitor

A corrosion inhibitor, oilfield technology, applied in wellbore/well components, earthwork drilling, etc., can solve the problems of narrow application range and high cost, and achieve good corrosion inhibition, significant use effect, and field application effect.

Inactive Publication Date: 2008-05-21
张煜
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

These ubiquitous defects such as high cost and narrow scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] 1. Synthesis of imidazoline quaternization modified products

[0026] Raw materials are prepared according to chemical reaction metering: industrial organic acids (oleic acid or naphthenic acid), organic amines (ethylenediamine, diethylenetriamine or hexamethylenediamine), xylene and nitrogen-containing compounds (benzyl ammonium chloride, alkane trimethylammonium chloride or polyquaternium).

[0027] The main equipment adopts: electric stirrer, three-neck reaction flask, condensation device and constant temperature heating mantle.

[0028] The specific synthesis method is as follows: in a reaction flask equipped with a stirrer, a condenser tube, a drop funnel, and a thermometer, add stoichiometric industrial organic acids, organic amines, and xylene into the reaction flask, and heat up to React at 100-110°C for 1 hour, then raise the temperature to 200-210°C and react for 1.5 hours to obtain an imidazoline compound, then react it with a nitrogen-containing compound in...

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Abstract

The invention relates to an oilfield inhibitor. The invention is characterized in that the inhibitor is made by compounding imidazolines quaternarized and modified product and organic phosphonate copolymer according to a proportion of (1.5-2) to (0.8-1.2); wherein, the imidazolines quaternarized and modified product is synthesized by industrial organic acid, diethylenetriamine, xylene and nitrogen compounds according to chemical dose reaction; the organic phosphonate copolymer is synthesized by organic amine, aldehyde and inorganic phosphide according to chemical dose reaction. Because the molecular structure (the molecular structure of the quaternarized imidazolines and the phosphonate) of oilfield inhibitor contains polarity groups (namely hydrophilic group) of strong absorption performance, the invention not only can prevent the corrosion caused by H2S and SRB, but also can prevent the corrosion caused by CO2 and uneven scaling; the inhibiting performance is excellent and the cost is low.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to an oil field corrosion inhibitor. Background technique [0002] Corrosion is a serious problem in the production process of oilfields, especially with the continuation of oilfield development time, the water content of crude oil increases year by year, and the corrosion of wellbore and surface oil collection pipelines, equipment, containers, etc. is becoming more and more serious, and they are corroded in a short time Perforated and scrapped, directly affects the normal production of the oil field. [0003] Although the corrosion process of oilfield wellbore and surface pipelines, equipment, containers, etc. in oilfield sewage is also electrochemical corrosion, the corrosion of this system is not like the corrosion in acid liquid, but a very complicated corrosion process , is caused by the joint action of many factors. The research shows that the main factor causi...

Claims

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Application Information

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IPC IPC(8): C09K8/54
Inventor 张煜
Owner 张煜
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