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