A new platform-evacuation system has been developed for the dry and secure clearance of crews from a platform in an emergency, although the system, devised by engineers at Trowa A/S of Bergen, Norway, is also aimed at another use: the transfer of platform crews by sea instead of by helicopter. Since emergencies are luckily fairly rare, this second use would doubtlessly be the main one. So the system involves a special ferry which can link up with a specially designed lift that fits into the platform. The ferry is a high-speed vessel designed for a passenger complement of about 200. Its stern is modified by splitting the hull so that the ship can back onto the guide wire for the lift capsule. The afterdeck is also shaped so that the capsule fits snugly. The lift capsule itself comprises a cabin and a lower rounded portion. The latter fits into the dock on the ferry deck and its shape allows the ship to roll without affecting the capsule. A guide wire hangs from the capsule dock on the platform, with a 20-ton weight hanging on its bottom end about 80 m below sea level. This damps out wave effects and eases docking of the ferry. Lifting machinery for the capsule includes heave compensators. The platform dock is like that used for existing capsules, except for inclusion of the lift machinery. As developed, the system is estimated to provide seats for crew members at around $24 each on a run to a typically placed platform in the northern North Sea. By comparison, seats in a helicopter can cost about $155 each. Transit time to mid North Sea fields is estimated at 4 hrs., indicating a running speed of around 30 kts.

  • Corporate Authors:

    Gulf Publishing Company

    Box 2608
    Houston, TX  United States  77001
  • Publication Date: 1978-9

Media Info

  • Pagination: p. 182
  • Serial:
    • Ocean Industry
    • Volume: 13
    • Issue Number: 9
    • Publisher: Gulf Publishing Company

Subject/Index Terms

Filing Info

  • Accession Number: 00183193
  • Record Type: Publication
  • Source Agency: Gulf Publishing Company
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM