is now said to be locked closed hydraulic pressure cannot reopen the valve in order to place the safety valve back in operation the dump kill valve 24 may be retrieved from the sidepocket mandrel and reset conventionally using conventional wireline methods and tools once the valve 24 has been repinned it may be run back into the mandrel 16 re establishing the hydraulic circuit in order to operate the subsurface safety valve 18 however it is to be noted that resetting the safety system 10 requires the use of a rig and wireline tools and operators and thus cannot be quickly accomplished and therefore is a great discouragement to any would be saboteurs therefore the safety system 10 is fail safe the lockout valve 18 cannot be reopened by pressure through the control line 42 from the well surface and therefore provides enhanced protection of the well reservoir from sabotage or unwanted intervention other and further embodiments of the present invention may be provided as best seen in fig4 and 5 wherein like parts to those described in connection with fig1 3 are provided with similar numbers with the addition of suffix 34 a 34 in some petroleum wells there are no safety systems such as a hydraulic or solenoid type well safety valve 18 which can be controlled through a control line to the well surface therefore a special safety valve generally indicated by the reference numeral 70 is disclosed for insertion in the production tubing 12 in order to prevent sabotage and to meet the needs of a lock closed system the valve 70 is a normally open valve but can be activated as.