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Reel-Lay Engineering

Reel-lay Engineering: Navigating the Complexities of Subsea Pipeline Installation

Dive into the world of reel-lay engineering with our comprehensive course, designed to provide a deep understanding of the reel-lay process, its history, and current market trends. This course offers an in-depth exploration of technical aspects such as strain concentration, material qualification, weld defects, and reeling forces. Learn from a variety of case studies highlighting both successes and failures in the field, enhancing your knowledge of optimised design and cost-effective strategies. Understand the intricacies of ovalisation, material and weld defects, and Engineering Critical Assessment (ECA) against codes and standards.

Interactive Learning

Interactive Learning
Engage in collaborative group sessions and interactive exercises surrounding pipeline fabrication and installation  

Industry insights
Industry insights
Gain invaluable industry insights into the engineering principles behind reel-lay installation

Networking Opportunities

Networking opportunities

Network with like-minded individuals, who share a background in installation

Enjoy exclusive access to Jeenius platform, a valuable learning resource.

Mastering Codes and Learning from Past Projects

Embark on a valuable learning journey with our course, where you'll receive expert guidance on codes and standards, crucial for any subsea installation project. Reviewing lessons learnt from past successes and failures not only deepens your understanding but also sharpens your skills for future projects. This knowledge is indispensable, enabling you to navigate installation projects with more confidence and proficiency. It's a chance to enhance your expertise, making you a more capable and informed professional in the dynamic field of pipeline installation.

Module Highlights

Day 1 - Reel-lay Process and Market Overview

Day one introduces the reel-lay process, covering system configuration, spooling, installation, and lay down. It also explores the history and development of reeling, including current market trends, reel-lay ships, and companies around the world. The day concludes with case studies on both failures and successes in reel-lay projects.

Day 2 – Technical Aspects and Forces

On the second day, participants delve deeper into the technical aspects of reel-lay engineering. This includes a thorough analysis of strain concentration, exploring the critical role of material qualification in the process. The day also focuses on identifying and addressing weld defects, understanding ovalisation, and comprehensively examining the reeling forces. The session covers the nuances of forces required for reeling-on pipelines, stresses encountered once reeled-on, and the complexities of straightening methods.

Day 3 – Advanced Topics in Ovalisation, Welding, and ECA

The third day focuses on ovalisation and its recovery, delving into the calculation of collapse pressure and addressing combined loading challenges. Participants will also explore welding methods, procedures, and inspection techniques, which are crucial for ensuring pipeline integrity. The day proceeds with an in-depth look at Engineering Critical Assessment (ECA), discussing applicable codes, standards, and methodologies from DNVGL and BSI. Additional case studies are presented, offering insights into optimised reeled pipe design, cost-effective reeling strategies, and innovative approaches for deep water pipeline and riser installation.


Who should attend?

Reel-lay process

  • Reel-lay system configuration
  • Spooling
  • Installation
  • Lay down

Reeling history and current market

  • History and development of reeling
  • Reeling ships and companies around the world

Case studies: failures and successes

  • Canapu pipe-in-pipe success
  • Asgard field joint buckling failure
  • Foinaven twisting problem
  • Tambar stress cracking failure
  • Nile insulation success
  • Dahlia spool site set-up success

Key technical aspects

  • Strain concentration
  • Material qualification
  • Weld defects
  • Ovalisation
  • Reeling forces
  • 13% chrome pipe
  • Clad pipe
  • Plastic-lined pipe
  • Codes and standards

Reeling forces

  • Force to reel-on
  • Stresses once reeled-on
  • Elastic energy in reel
  • Forces needed to straighten
  • Gripping force
  • Worked example
  • Stationary versus traversing straightener

Strain-concentration effects

  • Stress-strain curves
  • Effect of strain on material properties
  • Plastic behaviour during reeling
  • Geometric discontinuities
  • Material strength discontinuities
  • Strain concentrations at discontinuities
  • Safeguards


  • Ovalisation and recovery
  • Collapse pressure and combined loading
  • Worked example

Material and weld defects

  • Welding methods
  • Welding procedures
  • Inspection methods for welds


  • ECA basics
  • Applicable codes and standards
  • DNVGL and BSI approaches
  • Worked example

Further case studies

  • Optimised reeled pipe design
  • Cost-effective reeling
  • Deep water pipeline and riser
  • SCR hybrid installation
  • SCR fatigue qualification

Learning Outcomes

  • Explain the principles and processes of pipeline fabrication and installation using reel-lay
  • Identify and assess the key design aspects of the reeling process such as the implications of cumulative plastic strain, ovalisation and weld defects, while also listing the key pitfalls
  • Calculate the required tensions and forces in the pipeline and on associated equipment during reeling, and also the limits for these forces to prevent failure
  • Explain how strain concentrations can form during the reeling process, the potential effects of these concentrations and the safeguards against them
  • Specify materials and qualification testing for pipe installed by reel-lay
Subsea Oil and Gas Rig with Calm Sea and Clouds Image

Start Dates

Location Start Date End Date Number of Days Timings
Virtual (Live Instruction)
28th May 2024
30th May 2024
09:00 to 16:30 (with regular breaks)
Virtual (Live Instruction)
23rd September 2024
25th September 2024
09:00 to 16:30 (with regular breaks)

Your Pricing Path



  • Live Classes: Dive into live, interactive sessions focusing on real-time learning and discussions with peers and industry experts.

  • Access to Jeenius Platform: Unlock a realm of additional resources, peer forums, and expert interactions extending your learning beyond the classroom.

  • Industry Expert Interaction: Network and learn from seasoned industry professionals throughout the course, discussing real-world challenges and solutions.

Find Out more