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

Abstract

The invention relates to a stainless steel anti-corrosion pipe which is used in oil-gas field and a manufacturing method. The manufacturing technology of the stainless steel anti-corrosion pipe comprises the following steps: first, carrying out impact cleaning on an oil pipe or a sleeve pipe, then immersing in NaOH liquid for 3-5 seconds to remove oily soil on the surface of the oil pipe or the sleeve pipe, washing away residual oily soil by water, then washing in hydrochloric acid 15% for 5-7 seconds to remove oil on the pipe, washing away residual acid by water, assistant plating in plating auxiliary for 2 seconds, drying in a groove type drying pool for 2 seconds under the temperature of 120 DEG C, immersing the pipe in aluminum multicomponent alloy liquid, smelting the pipe for 3-5 seconds under the temperature of 700-750 DEG C, leading the surface of the pipe body into stainless steel, then air cooling and water cooling, and obtaining stainless steel anti-corrosion oil pipe and sleeve pipe through electric arc hot spraying on a screw thread. An oil pipe or a sleeve pipe which is prepared by the method has the advantages of good corrosion resistance, large binding force, good mechanical property, ageing resistance and strong antiscaling paraffin-controlling property.

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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