Method for manufacturing nanometer anticorrosive coating of oil pipe

Abstract

The invention discloses a method for manufacturing a nanometer anticorrosive coating of an oil pipe, comprising the following steps: degreasing and sandblasting the inner peripheral wall surface and the outer peripheral wall surface of the oil pipe; and respectively and sequentially coating the inner peripheral wall surface and the outer peripheral wall surface of the oil pipe with three layers of nanometer coatings by using nanometer coating in a spraying mode so as to make three layers of inner nanometer composite coatings and three layers of outer nanometer composite coatings on the inner peripheral wall and the outer peripheral wall of the oil pipe. The made three layers of the nanometer composite coatings comprising nanometer particles simultaneously have excellent impermeability, high temperature resistance and good coating adhesion performance.

Description

A kind of manufacturing method of oil pipe nano anticorrosion coating technical field The invention relates to a method for processing a nanocomposite coating on a water injection well oil pipe of an oil field water injection well, in particular to a method for manufacturing an oil pipe nano anticorrosion coating. Background technique At present, in the field of petroleum technology, there are many cases where nano-composite coating materials are used for heavy-duty anti-corrosion of existing anti-corrosion oil pipes, but not many can withstand high temperatures of 150 ° C and are used in acidic water-based media. For the anti-corrosion coating of the water injection well tubing used in the oil field, when the oil well depth reaches 3000-5000 meters, the temperature reaches 80-150 ℃, and the temperature resistance of the coating is required to reach 150 ℃, and the impermeability must be able to withstand 30- The 60Mpa strong water medium penetrates, and the adhesion must b...

AI Technical Summary

Problems solved by technology

For the anti-corrosion coating of the water injection well tubing used in the oil field, when the oil well depth reaches 3000-5000 meters, the temperature reaches 80-150 ℃, and the temperature resistance of the coating is required to reach 150 ℃, and the impermeability must be able to withstand 30- The 60Mpa strong water medium penetrates, and the adhesion must be able to withstand the weight of the oil pipe itself, which will cause the coating and steel to stretch. Corrosion and erosion of acidic water media such as hydrogen sulfide, hydrogen chloride, hydrofluoric acid, carbon dioxide, etc., and the adhesion of scale on the surface of the coating must also be prevented. However, the existing anti-corrosion oil pipes do not have the technology of high temperature resistance, acid corrosion resistance, and strong adhesion performance, and can not effectively prevent scale from adhering to the surface of the coating. Therefore, in the prior art, there is a lack of methods for manufacturing oil pipe nano-corrosion coatings with the properties of high temperature resistance, acid corrosion resistance, and strong adhesion.

Images