to the control valves 84 then the operator can activate the slips down control valve 84 c pressurized fluid then passes through the slips down control valve 84 c and flows into the outer groove 78 of the slips down hydraulic seal 72 c such that a differential pressure is created between the outer and inner surfaces of the seal wall 80 thereby energizing the seal 72 c to resiliently expand inwardly toward the slip bowl to engage the outer surface of the slip bowl the fluid then flows through the plurality of seal inlets 66 c around the circumference of the seal 72 c and into the slip bowl slips down inlets 61 c disposed about the outer circumference of the slip bowl the fluid then passes through slip bowl slips down conduit 94 c shown in fig8 and into the actuating rams such that the actuators push a set of slips inwardly to engage the drillstem 14 after the drill stem operation is complete and drilling is to be continued the operator closes the slips down control valve 84 c and opens the slips up control valve 84 a pressurized fluid from the power supply manifold 86 then passes through the slips up lines 64 a to the outer seal groove 78 in the slips up seal 72 a thereby energizing the seal 72 a to press against the outer surface of the slip bowl such that the inner groove 76 of the slips up seal 72 a forms a fluid conduit between the slips up seal inlet 66 a.