Jumbo subsea support

Jumbo Offshore has helped complete the installation of four 150 tonne subsea structures off the coast of Newfoundland, Canada, using Jumbo Javelin.

The foundations for the North Amethyst project, at the White Rose oilfield, included two module support frames and other structures weighing upwards of 30 tonnes. They were lowered to the Grand Banks sea floor at a depth of about 120 m. Jumbo Javelin was supporting offshore specialist Technip and its vessel Deep Pioneer.

Initially, the structures were loaded onto Jumbo Javelin at the port of Bay Bulls. The two 900 tonne capacity Huisman mast cranes were re-reeved from a 16-fall to a 4-fall configuration to reach the required depths.

Deep Pioneer had pre-installed the positioning guides at White Rose when Jumbo Javelin arrived to remove the sea fastenings and connect the lift rigging. The lowering of the foundations required both vessels to work closely with each other using their GPS-controlled DP2 systems.