Minimising Risk - Maximising Value

NSO - Conductor Repair - Tooling

NSO – Conductor Integrity – Tooling Development
NSO-Conductor-Repair-Tooling.jpg#asset:1Client: NSO 
Location: North Sea
Phase: 1 to 5
Year: June ‘16 – Sept ‘16
Scope :
SETS were commissioned to address integrity issues with a number of conductors at El-12 m installed on an elderly northern North Sea platform.
ROV inspection had drawn attention to instances of conductor damage within the El-12 m guides.  The damage consisted of fretting, cracking, holes and conductor severance. 
STEP 1, SETS project team evaluated repair options, cost estimates against well economics. 
STEP 2, Asset economics demanded a low cost solution.  Consequently ROV and diver deployed solutions were ruled out.  Solution was to pursue ‘Rope Access Deployed Remote Subsea Tooling’.
STEP 3, The required tooling was identified and concepts developed.  Vendors were identified across O&G industry sectors and beyond.  SETS competitively tendered detailed design and fabrication.  Installation vendor was engaged and consulted throughout design and built for operational input.
STEP 4, SETS actively managed the design and fabrication processes to meet tight mobilisation dates.  SETS managed two very successful site integration trials and personnel training prior to deployment offshore.
STEP 5, SETS closed the tooling design and build programme out by completing the scope on time and within budget.  Lessons were learnt and were applied to operational work packs.
Key Challenges :
·         Limited defect details
·         Interfaces between individual tools, repairs and asset
·         Interface management between multiple sub-vendors
·         Managing converging delivery schedules
·         Fast track delivery