• SECTOR: Interconnector

Project Overview

Project Info

  • Date 31/10/16 – 09/11/16
  • Site Carsaig-Jura
  • Vessel Kingdom of Fife
  • Operations Rock Bag Installation, Survey, Video and Inspection
  • UTROV® Tooling Used Rock Bag Deployment Tool

Utility ROV Services were contracted to perform rock bag installation operations to place protection on suspended sections of a subsea power cable running from Carsaig on the mainland to the Isle of Jura on Scotland’s west coast. 132 rock bags were deployed in a campaign lasting 10 days.

This required considerable pre-project planning both from an operational and engineering perspective. Utility ROV Services designed and manufactured the first revision of their Rock Bag Deployment Tool (RBDT) in only three weeks, specifically for this project. This work was undertaken in close collaboration with our client, taking into consideration their requirement of a reliable autonomous subsea release mechanism which could also be handled and connected safely on deck.

The project requirement was to deploy protective rock bags either side of a live power cable. The scope of work included both laying of the rock bags and completing an as-left survey of the protected cable.

The UTROV® system provided accurate as-left positions of the bags along with the required images captured during the operation. The operation was documented and signed off by the client on a daily basis, ensuring that no surprises were found at the end of the job when the as-left survey was completed.