April 1983 - Maritime Reporter and Engineering News

Semisubmersible Drill Rig Actinia Delivered By Hitachi Zosen

The Actinia, a semisubmersible offshore oil drilling rig, was recently completed at Hitachi Zosen's Ariake yard and delivered to the Actinia Shipping Corporation of Panama.

Actinia is 82.3 meters long (270 feet), 60.96 meters wide (200-feet), and 35.36 meters high (116-feet). The rig is Hitachi Zosen's SS-4000 type, based on an original design by Friede & Goldman, Ltd., of New Orleans, La. The rig's variable deck load is 3,200 metric tons.

The rig is capable of operating in deep seas of approximately 450 meters (1,500 feet) and of drilling to a maximum depth of 7,620 meters (25,000 feet). The rig is designed to withstand waves up to 30 meters high and wind speeds up to 50 meters sec. An eight-point mooring system has been adopted to keep the rig in position during drilling. Four thrusters are provided to back up the mooring system during bad weather.

In addition, the rig fully complies with the rules and regulations required for operations in the U.K. sector of the North Sea.

Other stories from April 1983 issue


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