Side pocket mandrel with an automatic valve

Claim 1

A SLIDE POCKET MANDREL VALVE ASSEMBLY COMPRISING IN COMBINATION A TUBING MANDREL HAVING A SIDE POCKET ADAPTED TO RECEIVE A FLOW CONTROL VALVE, SAID POCKET HAVING AN OPENING COMMUNICATING WITH THE EXTERIOR OF THE TUBING AT ONE LEVEL AND AN OPENING THROUGH ITS INTERIOR WALL COMMUNICATING WITH THE INTERIOR OF THE TUBING AT ANOTHER LEVEL; A RETRIEVABLE FLOW CONTROL VALVE DISPOSED IN SAID SIDE POCKET; AND A CUTOFF VALVE INCLUDING A HOUSING HAVING PASSAGE MEANS AND A VALVE SEAT, THE HOUSING BEING REMOVABLY MOUNTED AND LOCATED IN THE SIDE POCKET BELOW THE FLOW CONTROL VALVE AND IN NORMAL OPERATIVE POSITION COACTING WITH THE SIDE POCKET SO THAT IT PROVIDES COMMUNICATION BETWEEN THE TWO SIDE POCKET OPENINGS THROUGH THE HOUSING PASSAGE MEANS AND VALVE SEAT, THE HOUSING HAVING TOOL ENGAGING MEANS TO FACILITATE REMOVAL OF THE CUTOFF VALVE HOUSING FROM THE SIDE POCKET, A VALVE-CLOSURE MEMBER DISPOSED TO SEAT UPON SAID VALVE SEAT AND CLOSE SAID PASSAGE MEANS, A RESILIENT MEMBER DISPOSED TO URGE SAID VALVE CLOSURE MEMBER TOWARD SEATING POSITION, AND A PIN DISPOSED TO TRANSMIT CONTACT PRESSURE FROM SAID CONTROL VALVE TO SAID VALVE CLOSURE MEMBER TO URGE SAID VALVE CLOSURE MEMBER AWAY FROM SAID VALVE SEAT.