Skip links

Roc Oil Precision Rock Dumping

The Cliff Head Oil Field lies 10 km offshore in the Perth Basin,  approximately 350 km North of Perth.  In 2016/17 Roc Oil required 8 off pipeline freespans to be rectified through support and stabilisation measures.

Subcon supplied a combination of Standard Fabric Formwork grouted in-situ form the vessel back deck, and prefilled gravel bags.  We chartered a 28m Shallow Draft Workboat with 2 No. He-Dynamic Knuckle Boom Crane to form a full supply and install scope.

In 18m water depth, in a pristine fishery, the scope for the free span remediation included the following:

  1. Vessel Charter
  2. Remote Ballast Deployment Frame with integrated positioning system
  3. HPU
  4. Eyeball ROV
  5. Material supply and waste management

Download case study