Connectors for well parts

Claim 1

A WELL HEAD ASSEMBLY COMPRISING: A TUBULAR HEAD MEMBER HAVING AN AXIAL BORE, A TUBULAR HANGER MEMBER AXIALLY MOVABLE INTO THE BORE OF SAID HEAD MEMBER; STOP MEANS FOR LANDING SAID HANGER MEMBER IN SAID HEAD MEMBER, SAID HANGER MEMBER HAVING AN EXTERNAL CIRCUMFERENTIAL GROOVE, SAID HEAD MEMBER HAVING AN INTERNAL CIRCUMFERENTIAL GROOVE, A SPLIT RESILIENT LATCH RING MOUNTED IN SAID EXTERNAL GROOVE AND EXTENDING INTO SAID INTERNAL GROOVE TO LATCH SAID MEMBERS TOGETHER, SAID EXTERNAL GROOVE BEING RADIALLY DEEPER THAN SAID LATCH RING, A RESILIENT DEFORMABLE FILLER IN SAID EXTERNAL GROOVE WITHIN SAID LATCH RING FILLING THE SPACE BETWEEN SAID RING AND THE BASE OF SAID EXTERNAL GROOVE WHEN SAID RING IS IN LATCHING POSITION WITHIN SAID INTERNAL GROOVE TO PREVENT ACCUMULATION OF FOREIGN MATTER IN SAID EXTERNAL GROOVE, AND MEANS IN SAID HEAD MEMBER ENGAGEABLE WITH SAID RING TO CONTRACT THE SAME INTO SAID EXTERNAL GROOVE FULLY FROM SAID INTERNAL GROOVE AND COMPRESS SAID FILLER, SAID HANGER MEMBER HAVING A CHAMBER COMMUNICATING WITH THE REGION OF SAID EXTERNAL GROOVE CONTAINING SAID FILLER TO ENABLE SAID FILLER TO BE DEFORMED INTO SAID CHAMBER WHEN COMPRESSED.