Well tools

Claim 2

A FLOW CONTROL DEVICE FOR WELLS COMPRISING: A FLOW CONDUIT IN A WELL BORE EXTENDING TO AND SUPPORTED AT THE WELL SURFACE; HOUSING MEANS HAVING A FLOW PASSAGE EXTENDING THERETHROUGH AND REMOVABLY ANCHORED IN SAID FLOW CONDUIT; VALVE MEANS DISPOSED IN SAID FLOW PASSAGE TO MOVE BETWEEN OPEN AND CLOSED POSITIONS; SAID VALVE MEANS BEING PROVIDED WITH A FULL OPENING BORE THERETHROUGH; A TUBING STRING SUPPORTED IN THE FLOW CONDUIT ABOVE SAID VALVE MEANS; MEANS FOR BIASING SAID VALVE MEANS TOWARD CLOSED POSITION INCLUDING A WEIGHT MASS ADAPTED TO BE SLIDABLY CONNECTED TO THE LOWER END OF SAID TUBING STRING SUPPORTED ABOVE SAID HOUSING MEANS; AND PRESSURE RESPONSIVE MEANS OPERATIVELY CONNECTED WITH SAID WEIGHT MASS AND SAID TUBING STRING, SAID WEIGHT MASS BEING SUPPORTABLE TO HOLD SAID VALVE MEANS IN OPEN POSITION BY THE FORCE OF A DIFFERENTIAL IN FLUID PRESSURE ACTING ACROSS SAID PRESSURE RESPONSIVE MEANS AT THE SLIDABLE CONNECTION WITH SAID TUBING STRING.

Claim 3

A RUNNING TOOL FOR HANDLING A FLUID FLOW CONTROL DEVICE HAVING A HOUSING AND AN OPERATOR TUBE MOVABLE LONGITUDINALLY RELATIVE TO SAID HOUSING, SAID TOOL COMPRISING: A TUBULAR HOUSING; AN ANNULAR COLLET SLIDABLY DISPOSED WITHIN SAID HOUSING TO MOVE LONGITUDINALLY BETWEEN A FIRST UPPER POSITION FOR ENGAGING SAID COLLET OVER SAID OPERATOR TUBE, A SECOND INTERMEDIATE POSITION FOR INTERLOCKING SAID HOUSING WITH SAID OPERATOR TUBE, AND A THIRD LOWER POSITION FOR RELEASING SAID HOUSING FROM SAID OPERATOR TUBE; SAID HOUSING HAVING AN UPPER INTERNAL ANNULAR LOCKING RECESS TO RECEIVE THE HEADS OF SAID COLLET AS SAID FIRST POSITION OF SAID COLLET, A LOWER INTERNAL ANNULAR LOCKING RECESS TO RECEIVE SAID HEADS OF SAID COLLET AT SAID THIRD POSITION OF SAID COLLET, AND A LOCKING FLANGE BETWEEN SAID LOCKING RECESSES FOR HOLDING SAID COLLET HEAD IN LOCKED RELATIONSHIP BETWEEN SAID HOUSING AND SAID OPERATOR TUBE AT SAID SECOND POSITION OF SAID COLLET; AN INTERNAL ANNULAR RETAINER RING WITHIN SAID HOUSING BELOW SAID COLLET, SAID

Claim 4

A RUNNING TOOL FOR HANDLING A FLUID FLOW CONTROL DEVICE HAVING A HOUSING AND AN OPERATOR TUBE MOVABLE LONGITUDINALLY RELATIVE TO SAID HOUSING, SAID TOOL COMPRISING: A TUBULAR HOUSING; AN ANNULAR COLLET SLIDABLY DISPOSED WITHIN SAID HOUSING TO MOVE LONGITUDINALLY BETWEEN A FIRST UPPER POSITION FOR ENGAGING SAID COLLET OVER SAID OPERATOR TUBE, A SECOND INTERMEDIATE POSITION FOR INTERLOCKING SAID HOUSING WITH SAID OPERATOR TUBE, AND A THIRD LOWER POSITION FOR RELEASING SAID HOUSING FROM SAID OPERATOR TUBE; SAID HOUSING HAVING AN UPPER INTERNAL ANNULAR LOCKING RECESS TO RECEIVE THE HEADS OF SAID COLLET AS SAID FIRST POSITION OF SAID COLLET, A LOWER INTERNAL ANNULAR LOCKING RECESS TO RECEIVE SAID HEADS OF SAID COLLET AT SAID THIRD POSITION OF SAID COLLET, AND A LOCKING FLANGE BETWEEN SAID LOCKING RECESSES FOR HOLDING SAID COLLET HEAD IN LOCKED RELATIONSHIP BETWEEN SAID HOUSING AND SAID OPERATOR TUBE AT SAID SECOND POSITION OF SAID COLLET; AN INTERNAL ANNULAR RETAINER RING WITHIN SAID HOUSING BELOW SAID COLLET, SAID