{HEAD ~ A locking device} will lock the tieback member to {TAIL ~ the groove} in the wellhead housing 
{ HEAD ~ A locking device } will lock the tieback member to { TAIL ~ the groove } in the wellhead housing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH