Retrievable bridge plug

Claim 1

A RETRIEVABLE BRIDGE PLUG COMPRISING A PACKER MANDREL, A PACKER RING MOUNTED ON SAID MANDREL, A PLURALITY OF UPPER SLIPS AND LOWER SLIPS ON OPPOSITE SIDES OF THE PACKER RING, SAID SLIPS BEING MOUNTED IN MECHANICAL SLIP BODIES, SAID PACKER RING BEING POSITIONED BETWEEN AND IN ENGAGEMENT WITH SAID MECHANICAL SLIP BODIES, EACH OF SAID BODIES HAVING A SHOULDER ADJACENT THE PACKER RING AND HAVING INCLINED SURFACES COOPERATING WITH SAID SLIPS TO DISPLACE SAID SLIPS OUTWARDLY AGAINST A WELL CASING UPON LONGITUDINAL MOVEMENT OF SAID SLIP RELATIVE TO SAID SLIP BODIES, ONE OF SAID BODIES BEING MOVABLE LONGITUDINALLY ALONG THE MANDREL, THE OTHER OF SAID BODIES BEING SECURED TO SAID MANDREL, AND MEANS FOR MOVING SAID ONE BODY TOWARD THE OTHER BODY AND SAID SLIPS LONGITUDINALLY TOWARD EACH OTHER AND LONGITUDINALLY RELATIVE TO THEIR RESPECTIVE MECHANICAL SLIP BODIES TO EXPAND THE PACKER RING, WHEREBY THE SLIPS MAINTAIN THE PACKER RING EXPANDED.