Seal anchor packer from testing

The utility model relates to a seal anchor packer from testing belongs to oil gas well operation downhole tool field. This packer comprises interior center tube, outer center tube, slips and slips sheath, the threaded one end of interior center tube is installed the other end screw of top connection, interior center tube and is installed the lower clutch, install inner piston cover, release piece and outer center tube on the interior center tube between top connection and the lower clutch in proper order, the threaded one end of inner piston cover is installed the balance and is connected, and the balanced inner piston that connects the other end is put in and is installed bush and lower bush in proper order, goes up the bush and be provided with the bypass down between the bush to connect, the bypass is equipped with the lead ring on connecting the last bush of one side, should separate to seal the ware and adopt two groups packing element to seal up when sealing sitting, and sealing performance safe and reliable more when having guaranteed seat has easy operation, swift characteristics, carry out shutoff divided needs to the production string in having satisfied oil field production.