Saipem S.a.

Bouygues Offshore

Michel Gassert

Michel Pierre Baylot

Xavier Rocher

Olivier Lenormand

Stephane Couprie

A bottom-to-surface link with at least one underwater pipe having a portion with a substantially constant diameter and one or more floats in a string, the floats constituting cans surrounding the pipe and being located in a float zone around the top underwater portion of the pipe. The pipe is held at the surface by a guide device, preferably on a floating float support. The link includes at least one stabilizer situated in the top portion of the pipe. The link is arranged so that the bottom portion of the float zone, is preferably on or level with the lowest float and a transition zone is between the floats and the substantially constant diameter portion of the pipe.

Seafloor-surface linking device comprising a stabilizing element

The present invention relates to a floating support of the type having a cavity ( ) within which a plurality of risers ( ) can be positioned. According to the invention, the cavity ( ) has a plurality of compartments ( ) at the ends of which said risers ( ) are in a production position ( ), said compartments communicating with a central channel ( ) at the end of which there is situated ( ) a drilling derrick ( ), said compartments being disposed transversely relative to said central channel ( ).

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Saverne, France

Michel Gassert