second while the other will close first fig8 illustrates a second embodiment of the invention which includes two independent safety valves similar to those disclosed in fig1 each safety valve may include an actuator piston a flow sleeve a flapper valve element and a coil spring in this embodiment the safety valve includes six tubular sections 111 112 113 116 117 and 118 first tubular section 111 has an upper portion which may be threadably connected to production tubing in a known manner the lower portion of first tubular member includes a piston chamber in which piston 136 is received fluid under pressure is introduced into the piston chamber via an inlet 127 piston 112 acts on a flow sleeve 129 to open flapper valve 115 in the manner discussed above the second tubular section 112 is connected to tublar section 111 at a threaded joint 120 a third tubular section 113 is connected to second tubular section 112 at a threaded joint 121 a fourth tubular section 116 also has a piston chamber in which is mounted a piston 126 which is adapted to move flow sleeve 131 which will open flapper valve 125 in the same manner as discussed above a fifth tubular section 117 carries flow sleeve 131 and spring 132 and is connected to the fourth tubular section 116 by a threaded joint as shown it 123 hydraulic lines 127 and 114 are connected to a source of hydraulic fluid under pressure at the well head a sixth tubular member 118 is connected to the fifth tubular section 117 at a threaded joint shown at 124 the lower portion of the sixth tubular member includes a threaded female connector adapted to receive a threaded portion of a production tubular third tubular member 113 and.