{TAIL ~ The ratchet housing} 92 extends inwardly from the inside surface of the drill string 32 and {HEAD ~ washover pipe} 40 
{ TAIL ~ The ratchet housing } 92 extends inwardly from the inside surface of the drill string 32 and { HEAD ~ washover pipe } 40
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH