The utility model relates to a multiple -limb well bores well workover technical field, in particular to small -diameter packer. The device's top connection lower extreme suit is on last center tube, the packing ring, the sealed ring of gluing, go up the slips, go up the cone in order the suit on last center tube, it articulates step department outside last center tube to go up the slips, go up the cone and pass through the set screw connection on last center tube, place the internal side of epicone in and prevent the pawl with the adoption of last center tube and be connected from the catch, go up center tube lower extreme wall connection spacing collar, the stop collar suit is in the spacing collar outside, stop collar upper end top is on the catch, stop collar lower extreme top is under in the cone, go up the cone lower extreme and connect cone down, lower cone lower part, lower slips suit under on the center tube in order, lower center tube lower extreme wall connection lower clutch. The utility model discloses a diameter is little, fits and uses with 4 cun little sleeve pipes, and the slips is sat and is sealed about adopting in the design, has played and has prevented the effect of scurrying, does not need the drilling rod to salvage.