Anchoring means assembly

Claim 1

AN ANCHORING MEANS ASSEMBLY FOR USE IN A WELL PIPE INCLUDING: A SUPPORT, AN UPPER EXPANDER MEMBER SLIDEABLE WITHIN LIMITS ON THE SUPPORT, A LOWER EXPANDER MEMBER SLIDEABLY MOUNTED ON SAID SUPPORT, A PLURALITY OF GRIPPING ELEMENTS, MEANS MOUNTING SAID GRIPPING ELEMENTS BETWEEN SAID UPPER AND LOWER EXPANDERS FOR LIMITED LONGITUDINAL AND RADIAL MOVEMENT WITH RESPECT THERETO, EACH GRIPPING ELEMENT COMPRISING A BODY HAVING ITS INNER SURFACE FORMED WITH INCLINED AREAS FOR COACTION WITH THE UPPER AND LOWER EXPANDER MEMBERS, WHEREBY MOVEMENT OF THE MEMBERS RELATIVE TO THE GRIPPING ELEMENTS CONTROLS RADIAL MOVEMENT OF THE GRIPPING ELEMENTS, A FRICTION UNIT CONNECTED WITH THE LOWER EXPANDER MEMBER HAVING FRICTION MEANS FOR FRICTIONALLY ENGAGING THE WELL PIPE WITHIN WHICH THE ASSEMBLY IS LOWERED, A THREADED SECTION OF RIGHT-HAND THREADS ON THE EXTERIOR OF THE SUPPORT, A LATCHING MEANS MOUNTED IN THE FRICTION UNIT AND HAVING COMPLEMENTARY THREADS ENGAGEABLE WITH THE RIGHT-HAND THREADS ON THE SUPPORT, ENGAGEMENT OF THE RIGHT-HAND THREADS ON THE SUPPORT AND ON THE LATCHING MEANS FORMING A CONNECTION BETWEEN SAID SUPPORT AND THE LOWER EXPANDER MEMBER AND ROTATION OF SAID SUPPORT RELATIVE TO THE LATCHING MEANS DISCONNECTING THE SUPPORT FROM THE LOWER EXPANDER MEMBER TO PERMIT DOWNWARD MOVEMENT OF THE SUPPORT RELATIVE TO THE LOWER EXPANDER MEMBER WHEREBY THE EXPANDER MEMBERS MOVE BEHIND THE GRIPPING ELEMENTS TO THEREBY MOVE THE GRIPPING ELEMENTS RADIALLY OUTWARDLY INTO GRIPPING POSITION, A THREADED SECTION OF LEFT-HAND THREADS FORMED ON THE EXTERIOR OF THE SUPPORT, AND A LOCKING MEANS MOUNTED IN THE FRICTION UNIT AND HAVING THREADS COMPLEMENTARY TO AND ENGAGEABLE WITH THE LEFT-HAND THREADS OF SAID THREADED SECTION ON THE SUPPORT AFTER THE SUPPORT HAS MOVED DOWNWARDLY RELATIVE TO THE LOWER EXPANDER TO SET THE GRIPPING ELEMENTS INTO GRIPPING POSITION, WHEREBY THE GRIPPING ELEMENTS ARE LOCKED IN SUCH GRIPPING POSITION.