Subsea Facilities Life Extension

Samphire Subsea Case Study

Life extension is valuable, not only in terms of direct income to the operator, but also with regard to security of supply for the UK. The OGA/NSRI initiative around small pools depends upon existing infrastructure being kept in service long enough to facilitate the tie-back of small pools before they become stranded.

The Samphire Integrity Management team has a wide range of experience of life extension studies for a variety of subsea equipment including rigid pipelines, flexible risers and riser support systems, manifolds and valves, safety critical equipment, controls and chemical injection systems.


The team has worked with the standard life extension methodologies (e.g. ISO 12747:2013, NORSOK Y-002) and also developed a bespoke approach called the Janus Method to assess the potential for an open-ended life extension (i.e. when a desired new cessation of production date is as yet unknown), applicable primarily to trunklines and gathering systems where the operator wishes to know the viable life of the asset. This approach is centred on the risk assessment which is used to identify issues and looks back into the operating history to understand the current condition of the system and then projects forward to appraise the likely limits on future life. The team also has experience of assessing issues such as obsolescence.

It is also important to understand the legislative requirements related to life extension, an area in which Samphire also has experience.

Work Screening / Evaluation Equipment Criticality Review Risk Management Caisson Investigation Study/Repairs Subsea IRM - General Subsea Support Brownfield Project Execution Work Execution Pigging Campaign Management Subsea Engineering - Single Vessel Solution Subsea Controls Obsolescence Package Management Subsea Facilities Life Extension Subsea Decommissioning Services