Retrievable packer holddown device

Claim 1

IN A WELL TOOL ADAPTED TO BE RUN INTO A WELL BORE ON A RUNNING-IN STRING AND COMPRISING A MANDREL, FRICTION MEANS ON SAID MANDREL ENGAGEABLE WITH SAID WELL BORE, SAID FRICTION MEANS AND MANDREL BEING RELATIVELY MOVABLE, MEANS ON SAID MANDREL EXPANSIBLE INTO ENGAGEMENT WITH SAID WELL BORE, MEANS FOR EXPANDING SAID EXPANSIBLE MEANS UPON MOVEMENT OF SAID MANDREL RELATIVE TO SAID FRICTION MEANS, AND HOLD-DOWN MEANS CARRIED BY SAID MANDREL AND INCLUDING ANCHOR ELEMENTS ENGAGEABLE WITH THE WELL BORE WALL FOR RETAINING SAID TOOL IN SAID WELL BORE AGAINST UPWARD MOVEMENTS IN THE WELL BORE, SAID HOLD-DOWN MEANS INCLUDING ALSO A PAIR OF OPPOSED ELEMENTS SHIFTABLE RELATIVELY ONE TOWARDS THE OTHER, SAID ELEMENTS BEING DISPOSED ABOUT SAID MANDREL, AND MANDREL ENGAGING MEANS DISPOSED ABOUT SAID MANDREL BETWEEN SAID ELEMENTS ENGAGEABLE BY SAID ELEMENTS UPON MOVEMENT THEREOF ONE TOWARDS THE OTHER AND SHIFTABLE LATERALLY INTO CONTACT WITH SAID MANDREL FOR PREVENTING MOVEMENT OF SAID MANDREL, AND MEANS FOR EFFECTING RELATIVE MOVEMENT OF SAID ELEMENTS ONE TOWARD THE OTHER.