A-SQUARED ENGINEERING
  • A Squared Engineering
  • ABOUT
  • SERVICES
    • A Squared Subsea
    • A Squared Structures
    • A Squared Marine
  • CASE STUDIES
  • CONTACT US

CALM Buoy Replacement Risers

Customer Challenge

Client had a Fast-Track requirement for installation of replacement risers plus a new control umbilical in a single season.  These were to run from an offloading terminal CALM buoy to the seabed using a steep wave configuration.

​The control umbilical was to be piggy-backed to one of the risers. The work content was substantial, because the original mooring & in-situ analysis models for the buoy & risers were not available. Also, the new risers had different mechanical and hydrostatic properties to the original ones, having been installed 15 years previously.
​
Orcaflex mooring models had to be developed with minimum available information and then benchmarked against the original mooring analysis report to ensure it was an accurate match for the motions.  A more complex model was then developed to establish the characteristics of the new arrangement.
Picture

Key Skills Exhibited

Picture
This was a complex in-situ riser analysis, requiring an excellent understanding of piggy-back line behaviour. Hydrodynamic modelling and Orcaflex skills were also tested thoroughly, requiring a model that matched the excursions, motions and accelerations reported in the original analysis report.

Demonstrable experience in working with remote teams - end-client in Malaysia, installation contractor also in Malaysia & the clamp design team elsewhere in the UK - required cooperating successfully with a large multi-cultural & multi-discipline team located in various locations and superb communication skills.

Customer Benefit

  • Project was turned around quickly, with minimal comments and changes from the Client.
  • Priced lump-sum, PM and QA carried out internally, minimal risk to the client.
  • The analysis allowed a very efficient clamp design that eased and sped-up installation.
Picture
Picture
A Squared delivers engineering to be proud of in a range of areas across the offshore, oil and gas, marine renewable and commercial marine sectors.

​We specialise in structural design and analysis and naval architecture.

A Squared Engineering Ltd is an ISO 9001:2015 accredited company and is registered in Scotland with Company Number SC610793
Picture

​CONTACT US

enquiries@asquaredengineering.com
Tel: +44(0)1670 338 515
Blyth Workspace, Quay Road, Blyth, Northumberland, NE24 3AF

Copyright © 2020
  • A Squared Engineering
  • ABOUT
  • SERVICES
    • A Squared Subsea
    • A Squared Structures
    • A Squared Marine
  • CASE STUDIES
  • CONTACT US