TY JOUR TI APPLICATION OF ENERGY-SAVING TECHNOLOGIES IN CENTRIFUGAL PUMP UNITS FOR OIL PRODUCTION KW oil production KW energy saving KW centrifugal pumps KW energy characteristics KW valve electric motors JO Modern Technologies and Scientific and Technological Progress AU Arsent'ev, O.V. AU Korpan, V.Y. AU Brateiko, A.S. AU Zaitsev, S.A. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»