.~ With controllable bypass outside central conduit
DEFINITION
Classification: 166/183
(under subclass 179) Devices wherein the packer is adapted to be supported by a central conduit from the top of the well while it is being run into the well, the central conduit extending through the region of the blocking portion of the packer, and there is a fluid passage separate from the central conduit passageway, and through the packer blocking portion which fluid passage connects the space below the packer with the annular space above the packer, fluid flow in the passage being controllable or changeable by a valve, closure or changeable restriction as defined in subclass 224.
SEE OR SEARCH THIS CLASS, SUBCLASS:
129+, for devices as defined in subclass 183 with an expanding anchor means.
149+, for devices with a controllable passage between a central chamber and a space below a packer or plug and also a passageway between the central chamber and a space above the packer or plug, the said passageway being outside the central chamber and through the packer or plug.
