Production technology of steel tube with high-elasticity heat-resistant anti-corrosion abrasion-proof nano composite material coating

Abstract

A steel tube with a high stretch, heat resistance, anti-corrosion, anti-abrasion Nami compound material coating layer production technique is provided, which comprises: use emery to proceed spraying seed on the inner and outer surface of the steel tube to remove the iron dust erosion product of the inner and outer wall of the steel tube; use compressed air to blow off the floating sand and dust which passes through the inner surface of the steel tube, then preheat in a preheat furnace to remove water and moist on the inner wall of the tube; proceed titanium alloy compound material spray finishing to the inner surface of the steel tube after preheating to form a coating layer; make the steel tube after spray finishing rotate with the tube axle and the coating layer level evenly and the surface of the tube is smooth and neat; then make the coating layer solid completely to get finished steel tube; the titanium alloy compound material is composed of several kinds titanium alloy Nami powder as active addition agent, optimized resin and addition agent, the steel tube with the coating layer can be used as oil well flow string or water inlet to meet the requirements under the working condition of 2000m to 5000m deep well, which has long service life and be used for saving a large amount of steel material and reducing production cost.

Description

technical field [0001] The invention relates to a coating and a production process of a steel pipe with a high-elasticity, heat-resistant, corrosion-resistant and wear-resistant coating. The steel pipe is suitable for oil well production pipes and water injection pipes meeting the requirements of 2000m-5000m deep well operations. Background technique [0002] High elastic, heat-resistant, corrosion-resistant and wear-resistant coated composite steel pipes are of great significance to oilfield exploitation. There are more than 300 million meters of oil production pipes and more than 150 million meters of water injection pipes in my country's oilfields. The number of new oil wells and updated water injection pipes added every year is even greater. They have long been used for corrosion protection by nitriding, nickel-phosphorus plating, powder coatings, and composite resins. Because the liner (coating) has one or more disadvantages such as pinholes, poor plasticity, poor corro...

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Problems solved by technology

Because the liner (coating) has one or more disadvantages such as pinholes, poor plasticity, poor corrosion resistance, unstable heat resistance, and insufficient adhesion in a hot state, the service life of the water injection pipe and the oil extraction pipe is therefore It is greatly affected, and it must be replaced in as little as a few months, and the direct economic loss of one replacement is more than 100,000 yuan, and the indirect loss is hundreds of thousands of yuan.

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