Improvement device of scurrying on sleeve pipe

The utility model discloses an improvement device of scurrying on sleeve pipe belongs to the oilfield equipment field. Improvement device of scurrying on sleeve pipe includes: body, valve and packer, the one end of valve with the one end of body is connected, the packer sets up on the body. The utility model discloses an one end at the body sets up the valve, and set up the packer on the body, when scurrying on administering the sleeve pipe, go into to overlap this improvement device of scurrying on sleeve pipe intraductal down after closing the valve, and seal at a distance from accomplishing the sheathed tube sealedly through sitting a packer to the sleeve pipe, accomplish the oil well production that of the younger generation improvement device of scurrying on sleeve pipe of improvement of scurrying can return to normal on the sleeve pipe, solved and prevented through the well killing fluid that the oil gas water entering sheathed tube stability in the stratum is lower in the correlation technique, oil gas