July 21 - Technip, supported by Jumbo Offshore, has completed the installation of four subsea structures including two Module Support Frames each weighing approximately 150 tonnes.

The foundations were lowered to the Grand Banks sea floor at a depth of approximately 120 metres and will support subsea manifolds and flowlines that are part of a multiple well tie-back.

The project was executed at the White Rose oilfield, offshore Newfoundland, on behalf of a major Canadian energy company.

The offshore works were designed as a co-ordinated programme of tasks centred on the crane capacity of the HLV Jumbo Javelin, but controlled by subsea Survey and work class ROV operations based on one of Technip's vessels, the Deep Pioneer.

The scope of work was co-ordinated via the Technip Offshore Construction Manager and assisted by having key members of Technip's crew temporarily join Jumbo Javelin.

In the port of Bay Bulls, Jumbo Javelin was prepared for the job and loaded with two large and several smaller structures. The weight of the structures varied from 30 to 150 tonnes, the larger of which were fitted with pile guides to facilitate future pile driving operations.

Using its two 900 tonnes Huisman mast cranes for loading as well as for subsea installation, the cranes of Jumbo Javelin were re-reeved from a 16-fall to a 4-fall configuration. This way, a depth of 120 metres could be reached easily.