PUMPING JACK FOR EXPLOITATION OF SEVERAL WELLS Russian patent published in 1994 - IPC

FIELD: pumping equipment. SUBSTANCE: pistons, arranged in hydraulic cylinders and defining an under piston and an over piston cavities, are connected with rods. The hydraulic cylinders are mounted on a traverse bar. Their rods are joined with polished rods of sucker rod pumps, the traverse bar is connected with a rope suspension. The over piston cavities are mutually connected by the same pipeline with a gate valve, the under piston cavities are mutually connected by another pipeline. EFFECT: enlarged using range. 1 cl, 2 dwg