Permanent anchor for use with through tubing bridge plug

Abstract From the Canadian patent

Abstract of the Disclosure, A through tubing bridge plug is disclosed. In the preferred and illustrated embodiment a central hollow, tube having a passage therein supports the external parts. The central passage terminates top and bottom with openings or passages. At the top end, a sleeve valve mechanism originally pinned in an open position is installed. When the installation is completed the sleeve, valve is closed by a sequence of operations -to permanently close the flow path. The device is set and anchored by applying a relative downward force to an external sleeve thereby deploying multiple link -toggle means to lock the device in location, additionally deploying a upwardly facing …