Oil field compound type anti-scale corrosion inhibitor and preparation method thereof

A scale and corrosion inhibitor, oilfield technology, used in earth-moving drilling, wellbore/well components, etc., can solve the problems of high maintenance cost of uphole facilities, casualties of production stoppages, large direct losses, etc., and achieve good scale and corrosion inhibition. Effect, simple formula, low cost effect

Inactive Publication Date: 2013-02-06
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the report analysis of Zhongyuan Oilfield, corrosion causes a lot of direct losses to Zhongyuan Oilfield every year, among which the replacement of downhole facilities such as oil pipes, sucker rods, and pumps and the maintenance of uphole facilities are very expensive. technical problem

Method used

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  • Oil field compound type anti-scale corrosion inhibitor and preparation method thereof
  • Oil field compound type anti-scale corrosion inhibitor and preparation method thereof
  • Oil field compound type anti-scale corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mass ratio of each component of the compound scale and corrosion inhibitor for oil field is as follows:

[0024]

[0025] The preparation process of compound scale and corrosion inhibitors for oilfields: first dissolve sodium molybdate and sodium phosphate completely with hot water, then stir vigorously, add AA-AMPS copolymer during the stirring process, add ATMP and HEDP after fully dissolved , continue to stir and dissolve, add water to 1000g, and obtain a compound scale and corrosion inhibitor for oil fields.

[0026] The test temperature is 70°C, and the corrosion inhibitor is soaked in the coupon for 72 hours. The corrosion inhibition effect is as follows:

[0027] Table 1 Sustained-release efficiency of different dosing concentrations

[0028]

Embodiment 2

[0030] The mass ratio of each component of the compound scale and corrosion inhibitor for oil field is as follows:

[0031]

[0032] The preparation process of the composite scale and corrosion inhibitor for oil field is the same as that in Example 1.

[0033] The test temperature is 70°C, and the corrosion inhibitor is soaked in the coupon for 72 hours. The corrosion inhibition effect is as follows:

[0034] Table 2 Sustained-release efficiency of different dosing concentrations

[0035]

Embodiment 3

[0037] The mass ratio of each component of the compound scale and corrosion inhibitor for oil field is as follows:

[0038]

[0039] The preparation process of the composite scale and corrosion inhibitor for oil field is the same as that in Example 1.

[0040] The test temperature is 70°C, and the corrosion inhibitor is soaked in the coupon for 72 hours. The corrosion inhibition effect is as follows:

[0041] Table 3 Sustained-release efficiency of different dosing concentrations

[0042]

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Abstract

The invention relates to an oil field compound type anti-scale corrosion inhibitor and a preparation method thereof, belonging to the technical field of corrosion inhibitor. The oil field compound type anti-scale corrosion inhibitor is characterized by comprising the components by mass percent: 5-10% of sodium molybdate, 10-20% of sodium phosphate, 0.5-1% of acrylic acid-2-acrylamido-2-methyl propane sulfonic acid (AA-AMPS) copolymer, 1-2% of amino trimethylene phosphonic acid and 1-2% of hydroxyl ethylidene diphosphonic acid (HEDP). The preparation method comprises the steps of: firstly, completely dissolving sodium molybdate and sodium phosphate by using water; then, adding the AA-AMPS copolymer under the condition of stirring until the copolymer is completely dissolved; subsequently, adding ATMP and the HEDP, and further stirring for dissolving; and finally, adding water until the concentration of the mixed solution is in accordance with the requirement, so as to obtain the oil field compound type anti-scale corrosion inhibitor. The inhibitor disclosed by the invention has the advantages of simple components, available raw materials, simple technology, high efficiency, low cost, low dosage, good scale inhibition, descaling and corrosion inhibition effects and the like, and is convenient to prepare, rapid.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, in particular to a composite scale and corrosion inhibitor for oil fields and a preparation method thereof. Background technique [0002] At present, corrosion refers to the damage or deterioration of materials caused by the action of the surrounding environment medium. The oil and gas industry is the most severely affected by corrosion. Most oil and gas fields are distributed in saline-alkali marshes and oceans, with medium, strong, or even particularly strong corrosion, which is very corrosive to various pipelines, buried, and marine facilities. In addition, most oil and gas fields have entered the medium and high water cut period , the water content of the produced fluid is generally above 70% to 90%, and the corrosion of various facilities is very serious, and the corrosion rate is as high as 1.5 to 3mm / a. According to the report analysis of Zhongyuan Oilfield, corrosion causes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54
Inventor 胡欣
Owner E TECH ENERGY TECH DEV CORP
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