Step -by -step releasable packer

The utility model belongs to oil field downhole tool field especially relates to a step -by -step releasable packer, including the top connection, go up the overcoat, cut the body, center tube, bushing pipe, packing element subassembly, clamping ring, seat offset nail, deblocking pin, jump ring subassembly, jump ring cover, sit that a piston is organized, lower overcoat and lower clutch, still include well -flushing valve subassembly, stop collar and opening cover, the utility model discloses a lift mechanical deblocking mode, when lifting, the packer is deblocking step by step from top to bottom, and the deblocking pin that does not have a multiple string packer is the condition of atress simultaneously to avoid conventional packer and appeared lifting the too big problem of deblocking power because progression is too much, the utility model discloses a balanced type structural design, sit to seal, water injection and stop annotating the in -process, unexpected deblocking can effectively be avoided to the deblocking not atress of pinning.