TY JOUR TI Gas-driven downhole pumping unit for oil production from directional and horizontal wells KW oil well KW gas-driven downhole pumping unit KW slide KW pneumatic jack KW borehole plunger pump JO Oil and gas technologies and environmental safety AU Shishkin, N.. AU Marysheva, M.. PY 2023 IS 2023 PB Astrakhan State Technical University