Non-rotatable, straight pull shearable packer plug

摘要

A two-way retrievable packer plug is installed in the production bore of a flow conductor by straight insertion, and is retrieved by a one trip straight pull operation. The plug assembly includes a core mandrel which is enclosed within a tubular latch mandrel on which an annular seal assembly is mounted for sealing engagement against the production bore of a flow conductor. A latch key is yieldably biased by a coil spring for interlocking engagement with a latch retainer lug carried on a landing receptacle attached to the flow conductor. The latch key is moveable from a radially extended position in which it is engageable against the latch retainer lug so that the latch key is blocked against axial displacement relative to the landing receptacle as the plug mandrel is inserted into or withdrawn out of the flow conductor. The latch key is moveable to a radially retracted position in which it is released from blocking engagement with the latch retainer lug to permit passage of the latch key relative to the lug as the core mandrel is fully inserted within or fully retracted from the flow conductor. The latch key is supported in the radially extended position by raised shoulder portions of the core mandrel. The core mandrel is intersected by an equalizing passage which is open during run-in and insertion. The equalizing passage is sealed automatically by a slideable isolation sleeve as the running tool is separated from the plug, and is opened automatically during retrieval of the plug.