Stainless steel anti-corrosion pipe used for oil gas field and manufacturing method thereof

Abstract

The invention relates to a stainless steel anticorrosion pipe used in oil and gas fields and a manufacturing method thereof. The manufacturing process of the stainless steel anti-corrosion pipe is as follows: first, the oil pipe or casing is shot blasted, then soaked in NaOH solution for 3 to 5 minutes to remove the surface oil, and the residual oil is washed with water, and then the pipe is cleaned with 15% hydrochloric acid for 5 to 5 minutes. 7 minutes for degreasing treatment, wash off the residual acid with water, help plating in the plating solution for 2 minutes, dry in the trough drying tank at 120 ℃ for 2 minutes, immerse the tube in the aluminum multi-element alloy solution, at 700 Smelting at ~750°C for 3 to 5 minutes to make the surface of the pipe body stainless, then air-cooled, water-cooled, and arc thermal spraying on the threads to obtain stainless steel anti-corrosion oil pipes or casings. The oil pipe or casing prepared by the method has the characteristics of good corrosion resistance, high binding force, good mechanical performance, anti-aging and strong wax and scale resistance.

Description

Technical field: [0001] The invention relates to an oil pipe or casing used in the field of oil recovery in an oil field and a manufacturing method thereof, and belongs to a stainless steel anti-corrosion oil casing used in an oil and gas field and a manufacturing method thereof. Background technique: [0002] Oil pipes or casings are used to transport liquids during oil production. If oil pipes are used in the soil environment for a long time, corrosion and perforation will occur, which will cause the oil pipes or casings to be unusable before their service life is reached. The oil and casing anticorrosion methods currently used in the field are the surface isolation layer method, which can only temporarily isolate the environmental corrosive medium. The corrosion of the casing is intensified, and the surface isolation layer is mainly epoxy resin coating. These epoxy resin coatings have the problems of high water absorption, poor resistance to mechanical shock and mechanica...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing oil pipe or casing, such as poor anti-corrosion, anti-wax, anti-fouling effect and short service life, the present invention provides a stainless steel anti-corrosion oil casing and its production method, and the anti-corrosion pipe produced by the production method Not only has good corrosion resistance, strong binding force, good mechanical properties, anti-aging, but also has the advantages of strong anti-wax and anti-scaling

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