Steel Pipe for exploration, Production, Transmission and Transportation of Oil and / or gas, corrosion resistant, method to improve the corrosion Resistance and Manufacturing method

摘要

A Steel Pipe for exploration, Production, Transmission and Transportation of Oil and / or gas, resistant to localized corrosion caused by Fluid Medium containing sulphides, sulphates,Carbon Dioxide, hydrogen sulfide and brine together with hydrocarbons, where the Steel contienecomo indispensable components, in terms of percentages by weight: 0.25 to 0.50% Cu0.50 to 1.0% Cr and 0.05 0.40% C, additionally comprising at least one member selected Group that consists of neither the 0.0 0.0 - 0.4%; - 0.025% si 0.3 0.3 - 0.4% - 1.25%; MN; S 0.0 - V 0, 0.05%;02 - 0.1 percent and the balance based on fe and inevitable impurities.The Coating preferably comprises pipe to Pipe Well, for production, for injection Well, paraconduccion and accessories.The Tube made from Said Steel is preferably heated to a temperature between 850 and 950sc austenization followed by Cooling to obtain a Martensitic structure.Followed by heating to a temperature no higher Point AC1 Steel.