tubing and existing safety valve 102 to replacement valve 100 to operate flapper 116 from closed position to open position or vice versa furthermore referring again to fig1 an existing operating conduit 140 emplaced with existing safety valve 102 can be used to operate flapper 116 of replacement valve 100 specifically operating conduit 140 extends from a surface location to existing safety valve 102 to operate flapper disc 106 while operating conduit 140 is shown schematically as a hydraulic conduit it should be understood by one of ordinary skill in the art that any operating scheme including electrical mechanical pneumatic and fiber optic systems can be employed a passage 142 connects operating conduit 140 to inner bore 110 of existing safety valve 102 to allow operating conduit 140 to communicate with replacement valve 100 through a corresponding passage 144 a pressure accumulator 146 is housed within main body 112 of replacement valve 100 and acts to store and convert pressure from operating conduit 140 into mechanical energy to displace flapper 116 between open and closed positions hydraulic seals 124 126 ensure that any pressure in operating conduit 140 is maintained through passages 142 144 and accumulator 146 with little or negligible loss to prevent operating conduit 140 from communicating with bore 110 of existing safety valve 102 before replacement valve 100 is present a rupture disc not shown can be placed within passage 142 rupture disc can be configured to rupture at a pressure that is outside the normal.