(under subclass 118) Devices wherein the packer is adapted to be supported by a central conduit from the top of the well as it is run into the well and there is a fluid passage within the packer but not in communication with the central conduit passageway in the region of the packer, which fluid passage connects the space below the packer with the annular space above the packer, the fluid passage being controllable by a valve, closure or changeable restriction.
