It also forces the radially extending rings through the sealing material and into {HEAD ~ contact} with {TAIL ~ the surrounding tubular} 
with
It also forces the radially extending rings through the sealing material and into { HEAD ~ contact } with { TAIL ~ the surrounding tubular }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL