A drill bit assembly for a rotary drill having a source of fluid under pressure and three bearing mounted rotary cutting cones for drilling into relatively hard material comprises {HEAD ~ an elongated housing} with {TAIL ~ a first end} adapted for engagement with the drill and a second end including the cutting cones or tools for engagement with the material to be drilled 
A drill bit assembly for a rotary drill having a source of fluid under pressure and three bearing mounted rotary cutting cones for drilling into relatively hard material comprises { HEAD ~ an elongated housing } with { TAIL ~ a first end } adapted for engagement with the drill and a second end including the cutting cones or tools for engagement with the material to be drilled
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