nd of marine conductor 8 Supply conduit for fluid operable to transmit fluids such as mud to interior 6 of well bore beneath blowout preventors of installation 7 Pum to impart pressure to fluid in con uit l4 Annulus surrounding testing or conduit string 10 Upper conduit string portion extending to work site 1 (usually threadably interconnected conduit sections) Hydraulically operated, conduit stri