Underwater well completion assembly

Claim 1

IN AN UNDERWATER WELL INSTALLATION, A HANGER ASSEMBLY COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY MEMBER HAVING A LONGITUDINAL BORE THERETHROUGH, SAID BORE HAVING A LOWER END PORTION, AND SAID BODY MEMBER HAVING MEANS ADJACENT TO SAID LOWER END PORTION OF THE BORE FOR PROVIDING CONNECTION TO A WELL STRING; A SLEEVE MOUNTED ON SAID BODY MEMBER IN CIRCUMSCRIBING RELATION THERETO; A PLURALITY OF LOCKING LUGS MOUNTED IN SAID SLEEVE FOR RADIAL MOVEMENT WITH RESPECT THERETO BETWEEN A LOCKING POSITION PROJECTED RADIALLY OUTWARDLY FROM SAID SLEEVE AND AN UNLOCKED POSITION WITHDRAWN INTO SAID SLEEVE; CAM MEANS MOUNTED FOR MOVEMENT IN OPPOSITE FIRST AND SECOND DIRECTIONS AXIALLY WITH RESPECT TO SAID BODY MEMBER, SAID CAM MEANS HAVING A FIRST CAM SURFACE THAT PROJECTS SAID LUGS INTO THEIR LOCKING POSITIONS WHEN SAID CAM MEANS IS MOVED IN SAID FIRST DIRECTION, SAID CAM MEANS HAVING A SECOND CAM SURFACE THAT RETRACTS SAID LUGS INTO THEIR UNLOCKED POSITIONS WHEN SAID CAM MEANS IS MOVED IN SAID SECOND DIRECTION, SAID FIRST AND SECOND CAM SURFACES BEING UNITARILY MOVABLE; SPRING MEANS FOR MOVING SAID CAM MEANS IN SAID FIRST DIRECTION; AND FLUID PRESSURE OPERATED MEANS FOR MOVING SAID CAM MEANS IN SAID SECOND DIRECTION.