METHOD AND DEVICE FOR LINKING SURFACE TO THE SEABED FOR A SUBMARINE PIPELINE INSTALLED AT GREAT DEPTH

摘要

The invention concerns a device for linking the surface to the seabed for a submarine pipeline installed at great depth comprising a tower consisting of at least a floater (5, 14) associated with an anchoring system (6, 8, 16) and bearing at least a vertical riser (9, 15) capable of reaching down to the sea floor (18); and at least a linking pipe (4, 3) from the floater (5, 14) towards some surface support (1). The invention is characterised in that the linking pipe is a riser whereof the wall is a rigid steel tube and the floater (5, 14) is installed at an immersion depth below the last thermocline (29).