Core drilling apparatus that includes a wire line core barrel inner tube assembly movable through a drill stem to be seated in a latched core taking position adjacent the drill stem core bit and an overshot assembly coupled to {HEAD ~ the inner tube assembly} for lowering and withdrawing {TAIL ~ the inner tube assembly} in the drill stem 
for withdrawing
Core drilling apparatus that includes a wire line core barrel inner tube assembly movable through a drill stem to be seated in a latched core taking position adjacent the drill stem core bit and an overshot assembly coupled to { HEAD ~ the inner tube assembly } for lowering and withdrawing { TAIL ~ the inner tube assembly } in the drill stem
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH