Simple hole top for oil sucking well

The utility model relates to a simple well head of a pumping well, which is used when an oil field pumping well is repaired. The utility model comprises an adapter, a drop-proof hammer and a supporting joint, wherein, the inside of the upper end of the supporting joint is provided with a trumpet-shaped cavity; the drop-proof hammer is composed of a symmetrical truncated cone double-cone hammer block and shaft levers fixed on shaft lines of both ends of the double-cone hammer block; the taper of the double-cone hammer block is cooperated with the taper of the trumpet-shaped cavity at the inside of the upper end of the supporting joint; the shaft lines around the drop-proof hammer on the double-cone hammer block are uniformly distributed with passages which penetrate through the double-cone hammer block longitudinally; the inner diameter of the lower end of the adapter is cooperated with the outer diameter of the upper end of the supporting joint. The utility model has the advantages of simple structure and easy use.