Well packer assemblies

Claim 1

A WELL PACKER ASSEMBLY FOR CONNECTION IN A WELL TUBING STRING WITHIN A WELL BORE INCLUDING, A TUBULAR SUPPORT CONSISTING OF AN INNER TUBULAR MANDREL AND AN OUTER TUBULAR MANDREL, MEANS CONNECTING THE MANDRELS FOR LIMITED LONGITUDINAL MOVEMENT RELATIVE TO EACH OTHER, AN EXTERNAL ABUTMENT ON EACH MANDREL, MEANS LOCKING THE MANDRELS IN A PREDETERMINED POSITION RELATIVE TO EACH OTHER WITH THE ABUTMENTS SPACED FROM EACH OTHER, AN UPPER PACKING ELEMENT AND ANCHORING UNIT FOR SUPPORTING THE ASSEMBLY AGAINST DOWNWARD MOVEMENT IN THE WELL BORE MOUNTED ON ONE OF THE MANDRELS AND LOCATED ADJACENT THE UPPER ABUTMENT, A LOWER PACKING ELEMENT AND ANCHORING UNIT FOR SUPPORTING THE ASSEMBLY AGAINST UPWARD MOVEMENT IN THE WELL BORE AND LOCATED ADJACENT THE LOWER ABUTMENT, HYDRAULICALLY-ACTUATED MEANS ON THE SUPPORT BETWEEN SAID UPPER PACKING ELEMENT AND ANCHORING UNIT AND SAID LOWER PACKING ELEMENT AND ANCHORING UNIT FOR MOVING THE ELEMENTS AND UNITS INTO SET POSITION CONFINED BY THE ABUTMENTS, AND MEANS CO-ACTING WITH SAID LOCKING MEANS AND SAID MANDREL FOR RELEASING THE LOCKING MEANS TO PERMIT MOVEMENT OF THE MANDRELS RELATIVE TO EACH OTHER TO THEREBY MOVE THE ABUTMENTS AWAY FROM SAID PACKING ELEMENTS AND ANCHORING UNITS TO MOVE THE SAME TO AN UNSET POSITION.