Reel-lay engineering - Oil and Gas

Virtual classroom

Available dates:
No dates currently planned - speak to our Training team


Specialisation course


About the course

Detailing the engineering behind reel-lay installation, this is an advanced course that demystifies this complex field. Ideal for reeling companies and anyone involved in the design and installation of pipelines, this course explains the fundamentals of reel-lay.

The tutor will explain key design aspects such as the implications of cumulative plastic strain, ovalisation and weld defects using worked examples and exercises. Learners will receive guidance on codes and standards and review lessons learnt from past success and failures, developing their skills for installation projects.

At a glance

Available dates

No dates currently planned - speak to our Training team


3 days (21 study hours)


Virtual classroom




£2,100 plus VAT

Early Bird

Book up to six weeks in advance of the start date of your chosen course to take advantage of the Early Bird discount


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

Course structure

Day by day content

Day one

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

Day two

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

Day three


  • 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

What past delegates have said

Jee provides an (almost) exhaustive and very detailed course about reeling. The team is pedagogue and comprehensive

Pierre Brunet, Installation Engineer, Saipem

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Reel-lay engineering - Oil and Gas

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