Russian scientists have developed a new alloy called SeverCorr for oil-field pipelines that reduces the environmental risks while doubling its service life. The current oil field pipes operate in conditions of constant contact with a corrosive water-emulsion mixture of oil and concentrated salt solutions. This leads to short operation periods (about two years) and unpredictable accidents, which are often accompanied by the pollution of large swaths of surrounding areas.
NUST MISIS scientists have developed an innovative technology for the production of rolled steel to manufacture corrosion-resistant field pipes with improved mechanical characteristics by a complex microallocation of elements like chromium, copper, and nickel to obtain the necessary properties. The introduction of these metals into the liquid steel allows manufacturers to regulate the composition of corrosion-active non-metallic inclusions in the steel, thereby reducing their negative impact on its properties.
“The development of new alloying schemes (adding impurities to the composition of the materials to improve the properties of the base material) and providing the necessary structural and phase steel composition to the production of rolled and sheet metal has become our main task,” saidAlexander Komissarov, a NUST MISIS research associate.
The new steel grade will significantly reduce environmental risks and the operating costs of oil extraction, including in the hard-to-reach fields of Western Siberia, where repairing and replacing pipes is complicated by the conditions of their delivery and the necessary composition of hydrocarbons that lead to an increased level of corrosive wear.
Full-scale pilot tests of the new steel pipeline at the West Siberian oil fields of Lukoil, Gazprom Neft, and Irkutsk Oil will commence shortly.
Image credit: NUST MISIS