FIELD: oil and gas industry.
SUBSTANCE: drive contains esturial rods, a hydraulic cylinder with a float equipped with a toroidal cavity at the bottom, a control device connected to limit switches at dead points of float positions and a controlled valve. The power unit includes a centrifugal fan with an electric motor. The controlled valve is provided with flanges, one of which is connected to the air cavities of the hydraulic cylinder below the upper bottom of the cylinder and below the bulkhead of the float, forming a closed loop, and others are connected with the input and output of the centrifugal fan. The volume of the closed sealed toroidal cavity of the float is sufficient to achieve expulsive force which balances the mass of the well's line of rods, the float and half of the lifted mass of the oil column.
EFFECT: high resource is provided without friction of pistons, liquid oils, a fan with low revs, reduced drive weight, simplified design.
5 cl, 5 dwg
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