Venturi injection type plunger tool

The utility model discloses a venturi jet type plunger tool which comprises a plunger body, the plunger body comprises an inner salvage neck and a plunger body connected with the inner salvage neck, a salvage cavity is formed in the inner salvage neck, a cavity communicated with the salvage cavity is formed in the plunger body, the cavity comprises an upper cavity and a lower cavity, and the upper cavity and the lower cavity are communicated. The fishing cavity is communicated with the upper cavity, a Venturi chamber used for generating the Venturi effect is arranged between the upper cavity and the lower cavity, and the diameter of the section of the Venturi chamber is smaller than the diameter of the section of the upper cavity and the diameter of the section of the lower cavity. The cavity is formed in the plunger, the weight of the plunger is reduced, the cavity is communicated up and down, the pressure of liquid in an oil pipe on the plunger is reduced, and the descending speed of the plunger in the oil