The invention relates to the technical field of sealing elements, and discloses a
rubber cup sealing element for a self-sealing packer, the
rubber cup sealing element comprises a rubber element, a
metal framework and a reinforcing wire ring, the
metal framework comprises a first part fixedly arranged on the inner wall of the rubber element and a second part embedded in the rubber element, and the reinforcing wire ring wraps the outer wall of the rubber element; and the second part is connected between the first part and the reinforcing wire ring. The
metal framework plays a role in supporting the reinforcing wire ring, so that the reinforcing wire ring serves as a main body for supporting the rubber part, the deformation resistance of the rubber part can be improved when the rubber part bears
working pressure, the whole rubber part can be evenly stressed when the rubber part bears the
working pressure, meanwhile, the reinforcing wire ring has good elasticity, the outer wall of the rubber part is coated with the reinforcing wire ring, and the service life of the rubber part is prolonged. And as an exposed part, friction between the rubber part and the sleeve is reduced, the sealing part can bear
high pressure, the rubber part cannot be extruded into a gap between the sleeves, the sealing part is prevented from being damaged, and the service life of the sealing part is prolonged.