Rampion Phase 2

  • SECTOR: Offshore Renewables

Project Overview

Project Info

  • Date 12/12/16 – 09/01/17
  • Site Rampion
  • Vessel EDT Jane
  • Operations Boulder Relocation, Rock Bag Installation, Controlled Flow Excavation
  • UTROV® Tooling Used Tine Grab, Rock Bag Deployment Tool, Controlled Flow Excavator

Utility ROV Services were contracted by Hughes Sub Surface Engineering Ltd to conduct boulder relocation operations on the Rampion OWF for a second time. This scope was increased to include rock bag installation and controlled flow excavation operations. Our client had three separate requirements on this project:

  1. Route Clearance – repositioning of boulders from a new cable lay route. This included relocation and visual ‘as-found’ and ‘as-left’ surveys.
  2. Deploy pairs of protective rock bags either side of an exposed subsea cable.
  3. Excavate ‘trial’ trenches using the UTROV® with Controlled Flow Excavator (CFE) to determine if seabed conditions were suitable for a follow-on cable burial scope.

The route clearance scope of work extended to include visual survey of potential unexploded ordnance and shallow water boulder relocation. Utility ROV Services re-designed and manufactured the Rock Bag Deployment Tool (RBDT) to allow safe, autonomous deployment of two 4t rock bags simultaneously. The UTROV® system was pre-configured and supplied for crane deployment.

This was a showcase project for the UTROV® system as it utilised multiple tools to complete the various phases without the requirement for costly intermediate mobilisations. The vessel was only brought into port to be re-loaded with rock bags.