Removable hanger shoulder

Claim 1

MEANS FOR SUSPENDING PIPE UNDER TENSION IN A WELL COMPRISING A SUSPENSION MEMBER HAVING A BORE THERETHROUGH; AN ANNULAR UPWARDLY FACING SHOULDER IN THE BORE; A TUBULAR HANGER MEMBER; A GROOVE ABOUT THE OUTER SURFACE OF THE HANGER MEMBER DISPOSED IN SAID BORE; A SPLIT RING COMPRISED OF SEPARABLE SEGMENTS HINGEDLY JOINED AT ONE END AND HAVING FREE ENDS, WHICH MAY BE SEPARATED ABOUT THE HINGE AND PASSED ABOUT THE TUBULAR HANGER MEMBER FROM LATERALLY THEREOF AND CLOSED IN SAID GROOVE, SAID RING BEING OF GREATER DIAMETER THAN THE HANGER MEMBER SO AS TO PROVIDE AN OUTWARDLY EXTENDING REMOVABLE SHOULDER ABOUT THE HANGER MEMBER ARRANGED TO COME INTO CONTACT WITH THE UPWARDLY FACING SHOULDER IN THE BORE; SAID SPLIT RING BEING COMPRISED OF UPPER AND LOWER PAIRS OF RIGID ARCUTATE SEGMENTS EACH OF SAID PAIRS OF SEGMENTS HAVING A COMBINED ARCUATE LENGTH OF 360*, HAVING A RESILIENT SPLIT SEALING RING BONDED BETWEEN THE SEGMENTS; THE RESILIENT SEALING RING PROVIDING A RESILIENT HINGE BETWEEN THE ENDS OF THE RIGID SEGMENTS; AT LEAST ONE OF SAID PAIR OF ARCUATE SEGMENTS BEING OF DIFFERENT CIRCUMFERENTIAL LENGTH WITH RESPECT TO SAID HINGE PORTION SO THAT THE ABUTTING FREE ENDS OF THE UPPER ARCUATE SEGMENTS WILL OVERLAP THE ABUTTING FREE ENDS OF THE LOWER ARCUATE SEGMENTS WHEN SAID SPLIT RING IS IN CLOSED POSITION, AND THE FREE ENDS OF THE RESILIENT SPLIT RING ARE BEVELED AT THEIR CONTACTING SURFACES SO THAT WHEN THE FREE ENDS OF THE SPLIT RING ARE BROUGHT TOGETHER THERE IS PROVIDED A CONTINUOUS RING WITH OVERLAPPING SEALED BEVELED SURFACES SUPPORTED ON OPPOSITE SIDES BY THE RIGID SEGMENTS, SAID BEVEL EXTENDING FROM THE FREE END OF THE UPPER ARCUTE SEGMENTS TO THE OFFSET FREE END OF THE CORRESPONDING LOWER ARCUATE SEGMENT; MEANS FOR ANCHORING THE TUBING IN THE WELL BELOW THE SUSPENSION MEMBER; MEANS FOR EXERTING AN UPWARD PULL ON THE TUBING STRING ABOVE THE SUSPENSION MEMBER; THE HANGER MEMBER BEING OF A DIAMETER WITHOUT THE RE-