Anti-top-pressure-relief movable separate-layer fracturing packer

The utility model belongs to the technical field of oil field underground packers. The utility model relates to a packer, in particular to an anti-jacking pressure-relief movable type separate layer fracturing packer. The packer comprises an upper joint, a lower joint, a central pipe, a rubber sleeve and a rubber sleeve assembly, the upper connector and the lower connector are arranged at the upper end and the lower end of the packer respectively. The central pipe penetrates through the center of the packer; the packer further comprises a friction mechanism, a lower anchoring mechanism and anupper anchoring mechanism, the lower anchoring mechanism is arranged between the rubber sleeve and the lower connector, the friction mechanism is arranged between the lower anchoring mechanism and thelower connector, and the upper anchoring mechanism is arranged between the rubber sleeve and the upper connector. The bidirectional anchoring packer comprises the bidirectional anchoring mechanism, the anchoring effect is ver