Encyclopedia of Ocean Engineering

Living Edition
| Editors: Weicheng Cui, Shixiao Fu, Zhiqiang Hu

Decommissioning of Floating Platforms

  • Li HongtaoEmail author
Living reference work entry
DOI: https://doi.org/10.1007/978-981-10-6963-5_168-1
  • 7 Downloads

Definition

When the floating platforms reach the end of their lives or the oil field is exhausted, the platforms will be decommissioned. For floating platforms, there are two main decommissioning options: direct dismantling and reuse. The dismantling process of floating platform includes the following steps: (1) platform removal preparation, (2) well plugging and abandonment, (3) pipeline and flowline decommissioning, (4) structure removal, and (5) site clearance and verification (Kaiser and Liu 2015).

Scientific Fundamentals

Basic Decommissioning Method

Different types of floating platform will lead to different disassembly schemes:
  1. 1.

    Decommissioning of semisubmersible platform

    For semisubmersible platforms, the piles anchoring the structure to the seabed will remain in place, but the chains and cables will be removed. The upper chain sections will be removed with the HLV during hull removal. Cables will be removed with anchor handling vessels with twin wench spools. The risers can...

This is a preview of subscription content, log in to check access.

References

  1. Kaiser MJ, Liu M (2015) Decommissioning cost estimation for deep-water floating structures in the US Gulf of Mexico. Ships Offshore Struct 10(4):436–455CrossRefGoogle Scholar
  2. Minerals Management Service (2009) State of the Art for Removing GOM Facilities in Greater than 400 Feet Water Depth. MMS M09PC00004. Octobern.d.Google Scholar
  3. NGO Shipbreaking platform. Decommissioning of North Sea Floating Oil & Gas Units. September (2019)Google Scholar
  4. Red Hawk Down: How they made it look easy. (2015, February 23). Retrieved October 18, 2019, from Decom World: http://analysis.decomworld.com/projects-and-technologies/red-hawk-down-how-they-made-it-look-easy (2015)

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Offshore Engineering Technology Center of China Classification SocietyTianjinChina

Section editors and affiliations

  • Zunfeng Du
    • 1
  1. 1.Department of Naval Architecture and Ocean Engineering, School of Civil EngineeringTianjin UniversityTianjinChina