Mechanically set high temperature well packer

Claim 1

A PACKER SETTABLE IN THE FLOW PASSAGE OF A FLOW CONDUCTOR, SAID PACKER INCLUDING: A MANDREL; AN EXPANDABLE PACKING MEANS DISPOSED ON SAID MANDREL, UPPER AND LOWER PACKING SETTING ASSEMBLIES MOUNTED ON SAID MANDREL IN INITIALLY INOPERATIVE POSITIONS ABOVE AND BELOW SAID PACKING MEANS, SAID UPPER ASSEMBLY HAVING LATCH MEANS INCLUDING MEANS ENGAGEABLE WITH SAID FLOW CONDUCTOR, SAID LATCH MEANS RELEASING SAID UPPER ASSEMBLY FOR MOVEMENT TO OPERATIVE POSITION IN WHICH SAID UPPER ASSEMBLY IS IN ENGAGEMENT WITH AND ANCHORED AGAINST UPWARD MOVEMENT IN THE FLOW CONDUCTOR UPON ROTATIONAL MOVEMENT OF SAID MANDREL RELATIVE TO SAID LATCH MEANS, AND PROTECTOR MEANS CONNECTED TO SAID MANDREL AND DISPOSED ABOUT SAID PACKING MEANS, SAID PROTECTOR MEANS BEING MOVABLE UPWARDLY WITH SAID MANDREL RELATIVE TO SAID PACKING MEANS TO FREE SAID PACKING MEANS FOR RADIAL OUTWARD EXPANSION WHEN SAID UPPER ASSEMBLY IS IN SAID OPERATIVE POSITION.