Water injection packer

The utility model belongs to the technical field of the packer, especially, relate to a water injection packer. Including the center tube, the last end screw thread connection of center tube has the top connection, the lower end screw thread connection of center tube has the lower clutch, the center tube has cup jointed the urceolus outward, form the annular space between urceolus and the center tube, packing element and outer packing element in annular space is equipped with, form the packing element chamber between interior packing element and the outer packing element, it can be along gliding upper piston of center tube and lower piston to be equipped with on interior packing element and the outer packing element, upper piston and lower piston divide into the annular space jointly goes up the annular space, well annular space and lower annular space, be equipped with the lower through -hole that can communicate the packing element chamber on the lower piston, be equipped with the last through -hole that ca