The Raft Supported Semisubmersible (RSS) described in this paper is a novel design intended to overcome the drawbacks of monohull production systems by allowing less expensive 2nd and 3rd generation semisubmersible drilling rigs to be converted to floating production facilities with oil storage. In order to accomplish this the semisubmersible rig is fitted with an oil storage raft located below the pontoons. The advantages of the RSS concept compared to a conventional conversion of a drilling semisubmersible can be summarised as follows: oil storage of 40,000 - 80,000m3; increased payload (governed by the deck structural capacity); and increased fatigue life with modified wave loading and new load paths provided through the raft structure. The paper gives an outline description of the RSS concept and presents results for a case example based on a Sedco 700 rig.

  • Supplemental Notes:
    • FPSO World Congress and Technology Exhibition '95; 11-13 Oct 1995; Aberdeen, UK. Pprs. Publ by OCS Technology Group, UK; ISBN 0906-314-55-24 [11 p, 7 fig]
  • Authors:
    • Christiansen, P E
    • B tker, S
    • Condon, T
  • Publication Date: 1995


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727872
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM