Pressure -bearing sleeve pipe protection packer

The utility model provides a pressure -bearing sleeve pipe protection packer, the sealing performance of cover protection of pipe pressure -bearing packer designs in the directional well in order to promote for it, has increased righting device, and it is honored as a queen four to sit sets upright or straight the outstanding packer body of ball, supports on the casing wall, makes the packer placed in the middle, and the atress is even all around for sealed packing element to reduce the tubular column wriggling, increase pressure -bearing packing element device is sat the pressure -bearing packing element of being honored as a queen and is shifted up, breaks away from and presses a section of thick bamboo, opens by the elasticity of packing element self, is similar to the horn mouth, supports on the casing wall, and the undulant destruction to sealing up the packing element of separation water injection pressure promotes the sealing performance that the packer was protected to the sleeve pipe by a wide margin, locking piece initiative anchoring urceolus is avoided knowing the offset nail and receive the shearing when the water injection, prevents that the packer is because of the wriggling deblocking. Simultaneously, this packer adopts the biliquid to press a seat working method, has to sit to seal reliable, seat an auto -lock and a backwash well function.