High-temperature resistant thermal recovery packer

The utility model provides a high-temperature resistant thermal recovery packer, which is characterized by comprising an upper joint, a first-stage hydraulic cylinder, a first rubber bucket, a second rubber bucket, a second-stage hydraulic cylinder, a third rubber bucket, a third-stage hydraulic cylinder and a lower joint, wherein the upper joint and the lower joint are respectively connected with an oil pipe in up and down manner; one end of the first-stage hydraulic cylinder is connected with the upper joint; the other end of the first-stage hydraulic cylinder is connected with the first rubber bucket; one end of the third-stage hydraulic cylinder is connected with the lower joint; the other end of the third-stage hydraulic cylinder is connected with the third rubber bucket; the first rubber bucket and the second rubber bucket are closely connected through a check ring; and the second-stage hydraulic cylinder is used for connecting the second rubber bucket and the third rubber bucket. By adding two layers o