Twin-well column pumping unit

A twin-well column pumping unit comprises an upright column and a beam hanger suspended on both sides of the upright column through a steel wire rope group; the beam hanger is connected with the upper ends of pumping rods on both sides of the upright column, an upper beam is fixed on the top of the upright column, a driving device is fixed on the upper beam, a friction wheel is mounted on the driving device and is connected with a tractor of the driving device, an upper pulley and a lower pulley are mounted on an adjusting rail of the upper beam, a steel wire rope pre-tensioning device is suspended on the steel wire rope on both sides of the friction wheel; the beam hanger, the upper pulley, the lower pulley, the driving device and a combined counterweight are connected together through a steel wire rope; the driving device drives the pumping rods on both sides to move up and down, during single well maintenance process, the adjusting rail of the upper beam moves to save space for the maintenance hoisting of