Work Execution

Samphire Subsea Case Study

Once work approval has been granted for maintenance or plant modifications, the effectiveness of the solution and work procedure can impact the asset performance and costs.

Selecting the best overall solution is critical and can have a major impact on plant down time or costs. Even with the right solution, focus on execution is necessary to help deliver the best / most efficient overall work programme.


Samphire has recently delivered the management of riser replacement works and umbilical installation for a mid-tier operator. This provided several opportunities for solution selection and development as well as execution delivery which had a direct impact on the work execution plan and costs. The key areas that were subject to critical reviews were:

The riser clamp work was designed to minimise scope offshore through retrofit onto the new riser head direct to the structure. The existing facilities would be untouched minimising vessel time. The risk around fitment and existing infrastructure had to be managed through early metrology and adjustment through the campaign to ensure it could be accommodated within the asset outage window.

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