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