Integrated, float-over deck design considerations

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:423148

Hartell, W D; Beattie, S M

Offshore platforms with integrated, lift installed decks have become increasingly common design concepts in the last ten years based on the availability of super heavy lift crane vessels in certain parts of the world. High installation costs for these lifting vessels have led operators to investigate alternate installation methods. The integrated, float-over (IFO) deck concept has been utilized several times in the last 17 years. Recent successful design and installation experiences with integrated, float-over decks in the Far East have encouraged operators and designers to consider this concept more frequently for applications in other areas. The purpose of this paper is to describe some of these recent experiences and how the experience might be applied for similar offshore developments in the future. Design and installation considerations are reviewed and recommendations made for future applications of the concept. The paper discusses the development of various details for particular applications. The development of a platform structural configuration based on the weight of the topsides, transportation vessel selection, and required size of vessel opening in the structure are discussed. Installation equipment including vessel systems (fendering, mooring, and rapid ballasting) and load transfer systems (structure fendering, alignment, guides, and passive/active mating/lowering details) are reviewed. Installation (naval architecture/structural) and operational (structural) analyses and design are described.

• OSTI ID: 423148
• Report Number(s): CONF-960525--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
INSTALLATION
MATERIALS HANDLING EQUIPMENT
MOORINGS
OFFSHORE PLATFORMS
SHIPS
SHOCK ABSORBERS
SPECIFICATIONS