Topsides installation methods for deep draft semisubmersibles

Niels Haakman, Rutger Dolk,CIMC Raffles Offshore Ltd.

The risks of integration and commissioning deepwater field development projects affect the selection of a platform design concept. Selection of the design is subject to contradictory influences. The semisubmersible-based FPU can be integrated and commissioned at the dock, but a spar used when drilling and workover is needed can save the cost of long-term MODU with the added advantage o lower heave motions.

This presentation looks at these contradictory selection criteria with an eye toward constructability and topsides integration of a deep draft semisubmersible. The author compares: use of a 20,000-ton crane for offshore floatovers; a heavy-lift derrick barge; application of a jacking system; Kiewit’s Heavy Lift Device; and use of multiple lifts to assemble modular topsides.

Wednesday, 14:30 - 15:00 - ROOM E104