One or more mud pump 10 pump mud from {TAIL ~ the pits} through the fill line 12 and into {HEAD ~ the interior} of the drill pipe DP 
One or more mud pump 10 pump mud from { TAIL ~ the pits } through the fill line 12 and into { HEAD ~ the interior } of the drill pipe DP
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH