Conoco Viking Vulcan Decommissioning

31st December 2019
  • Projects

Derrick Services UK Limited were awarded a work package to support Royal Boskalis with Decommissioning Support Services including all above water leg cutting throughout the 2019 multi-phase Southern North Sea Decommissioning Campaign.

7 Jackets & 4 Topsides were successfully removed from the field and transported ashore for dismantling.

Robust planning, comprehensive pre-works & the adoption of a one team philosophy were a significant element that contributed to the successful project execution.

DSL personnel executed over 38,000 Man-hours on the project (Rope Access & Non Rope Access) without a LTI, this is a credit to all involved in the project including offshore personnel, & the robust onshore support structure.

  • Installation of Spider Deck Access
  • Cutting & Removal of Caissons and Risers
  • Cutting Penetrations for Rigging
  • Installation of Fairlead Bollards
  • Sling Path Clearance
  • Topsides Lift point (Trunnion) Installation
  • Topside Separation Cuts at El +17.3
  • External Pile Cutting
  • Cutting and Removal of Leg extensions at El+7.9
  • Installation of Rigging and Steering Wires
  • Rigging & Cutting platform Installation
  • Sea Fastening of Topsides and Jackets

Project Description

The work scope involved numerous work tasks in what were challenging conditions spanning;

  • Onshore Project Management
  • Engineering & Fabrication
  • Redundant equipment removal
  • Installation of lifting points
  • Caisson, Riser & J tube Removal
  • Sling path Clearing & Air Gapping
  • Leg Cutting Platform Installation
  • Leg Cutting (Oxy Acetylene)
  • Offshore Construction Services
  • Rope Access Personnel (Welders, Platers, Pipe-fitters, Riggers, E&I)

Services Provided

  • Project Planning
  • Engineering and Fabrication
  • Rope access Personnel and Equipment
  • Offshore Construction Services
  • Redundant Equipment Removal
  • Communication Tower Removal

Benefits to the client

  • Multi-disciplined personnel on the asset creating efficiencies
  • Collaborative approach between Client, Construction Contractor and HLV contractor
  • Open discussions leading to innovative ideas resulting in cost and time efficiencies
  • Open sharing of Information between all parties
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