Our aim was to address vulnerabilities present in the subsea control system, specifically degraded power and communications to the Machar, Madoes and Mirren fields within the Eastern Trough Area Project (ETAP) development. The project took place in Central North Sea, Block 22/23, at a depth on 92 metres in a combined total of 52 days.

Scope of Work:

The project was split into three phases; Machar umbilical lay, riser umbilical lay and structure installation and EECU works. These phases then included:

Phase 1: Machar Umbilical Lay

  • Initial mobilisation in Peterhead
  • Transit to Nexans Halden plant
  • Transit to BP ETAP field
  • 35km umbilical lay
  • Transit to Peterhead for demobilisation

This phase was completed 7 days ahead of schedule.

Phase 2: Riser Umbilical Lay and Structure Installation

  • Mobilisation in Aberdeen:
  • Transit to field
  • In-field operations
  • Transit to Peterhead for demobilisation

This phase was completed 2 days ahead of schedule.

Phase 3: EECU Works

  • Mobilisation in Aberdeen
  • Transit to field
  • Infield operations
  • Transit to Aberdeen for demobilisation


Key highlights included our ability to quickly turnaround client requirements, remaining flexible and adaptable to a changing offshore workscope.

There were no Lost Time Injuries during any scope of this project.