TY JOUR TI SCREW-shaped SUCKER ROD PUMPING unitS DRIVEN by VERTICAL AXIS WIND TURBINE for oil extraction KW screw-shaped pumps KW pumping unit drive KW oil extraction KW oil fields KW top drive KW wind turbines KW Darrieus rotors KW Savonius rotors KW combined wind turbines JO Vestnik of Astrakhan State Technical University AU Terentiev, I.. AU Shishkin, N.. PY 2016 IS 2016 PB Astrakhan State Technical University