Safely Securing and Recovering Caissons

Sponsored by: STATS Group

Focused on:

  • Caissons
  • Vessels
  • Lifting Tools

Date: 21 March


Time: 3PM London/11AM New York

Internal and external lifting tools used to prevent dropped object threat from damaged caissons

Caissons are used in a variety of applications on offshore production platforms and vessels. Common uses for caissons are firewater and seawater lift, drain as well as I-Tube and J-Tube applications. Due to platform life extension, caissons have often been in place longer than planned, and deterioration and failure of caissons is a growing trend in the North Sea and worldwide. This deterioration and failure may present a dropped object risk to subsea structural and piping systems. Should a caisson become detached this would pose a serious safety concern for a platform and risk damage to subsea pipelines and equipment, impacting on production and reputation.

STATS provide a range of caisson handling tools for safely securing and recovering damaged or redundant caissons. Internal and External Lifting Tools (ILT / ELT) cover a range of sizes and safe working loads to allow for safe and controlled caisson removal.

Internal and External Lifting Tools are used to safely secure damaged or corroded caissons in position, until a planned retrieval back to the platform can be performed using the same tool. The compact size of the ELT and modular design of the ILT allows caissons to be recovered where space is limited. Caissons can then be securely lifted and cut into manageable sections to allow safe removal from the platform.

Join this webinar to find out more about STATS mechanical lifting tools for safe handling and operation during caisson removal without the need to shutdown production. The webinar will conclude with recent case studies where lifting tools have been used in the UKCS to facilitate the removal of caissons.

Presented by

Dale Millward,

Director of EPRS & Subsea Services

Dale has worked in the pipeline and subsea intervention industry since 1992 with involvement in subsea construction, commissioning, repair, isolation, maintenance and decommissioning projects.

He graduated from the Robert Gordon University in Aberdeen with a B.Eng (Hons) in Mechanical and Offshore Engineering. He worked as a subsea Engineer as the Client’s Representative on diver and WCROV projects and is an IMCA certified Technical Representative.

He joined STATS Group in 2005 and has been involved in the design, development and delivery of bespoke engineered pipeline isolation, repair and recovery solutions.

Key Learning Objectives

  • Awareness of structural integrity issues affecting caissons
  • Overview of how internal and external lifting tools function and are used to recover caissons
  • Highlighting built-in fail-safes inherent in the lifting tool design
  • Understand how engineering and testing provides technical safety assurance


  • Integrity Engineers
  • Structural Engineers
  • Subsea Engineers
  • Technical Safety
  • HSE
  • Project Engineers
  • Offshore Management
  • Consultants
  • Pipeline Technical Authority
  • Asset Integrity Manager
  • Pipeline Asset Manager
  • Pipeline Maintenance
  • Operations & Maintenance Manager
  • Technical Manager
  • Head of Maintenance