(under subclass 179) Devices comprising means for detachably coupling the device to a means for lowering the device into the surrounding conduit, the detachable connection being such that the packer or plug may be left in the well while the lowering means is completely withdrawn.
SEE OR SEARCH THIS CLASS, SUBCLASS:
117, for receptacles detachable from a lowering means, the detached portions of the receptacle and the contents of the receptacle cooperating to form a plug.
123+, for packers or plugs with expanding anchor means and detachable setting means.
143+, for packers with a controllable passage between a
central chamber and the space below the packer, the central chamber being detachable from the packer.
158, for a screen with a washing point or shoe having a detachable wash pipe. 205, for a screen having a portion removable in the well.
