The Use of Buoyancy to Lift Heavy Objects from the Sea.

Abstract

To recover oil from economically marginal offshore fields the re-use of production platforms has been considered. Re-use involves severing the jacket from the seabed, rotating the jacket to the horizontal and lifting it through the air/sea interface in a configuration suitable for towing. Five systems are considered for use in the recovery process. Two systems currently used for installation are found suitable for modification to recover jackets. They are the pontoon barge system and the self-floating tower. Major problems to be overcome in modifying for retraction are mating of the pontoon barge with the tower, developing a pile system which can be refurbished, and ensuring transverse stability on retraction through the air/sea interface.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1981
Accession Number
ADA119320

Entities

People

  • Richard Paul Fiske

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bending Moments
  • Buoyancy
  • Center Of Gravity
  • Civil Engineering
  • Compressed Air
  • Engineering
  • Engineers
  • Fabrication
  • Load Distribution
  • Marine Engineering
  • Materials
  • Mathematical Models
  • Naval Architecture
  • Offshore
  • Platforms
  • Production
  • Seabed

Readers

  • Electrical Engineering
  • Facility/Structural Engineering.
  • Marine Hydrodynamics