CIS completes subsea piling work offshore Norway
Conductor Installation Services Ltd. (CIS), an Acteon company, has completed its first subsea piling services contract.
CIS used its new remotely operated Subsea Piling System, which makes it possible to drive piles as large as 36 in. in diameter, in water depths to 300 m (984 ft). The piles were driven to permanently secure two subsea structures to the seabed and to initiate three rigid pipelines being installed byTechnip on the Bøyla development project offshore Norway.
Following preparation and testing of all equipment at its base in Great Yarmouth, UK, CIS mobilized the full Subsea Piling System to Haugesund, Norway. It was then loaded onto the support vessel, from which the four-member CIS crew would carry out all subsea piling operations remotely, using a control unit and monitoring system.
In late March, the team set out with all equipment to the Bøyla field. Working as weather permitted in a maximum water depth of 120 m (394 ft), CIS drove the three 30-in. initiation anchor piles, four 30-in. manifold piles, and four 24-in. pipeline end manifold piles. All piles were driven into the seabed to their respective target depths, ranging from 10 m (33 ft) to 23 m (76 ft). The subsea operation was completed in April, well within the requisite timeframe.