On three separate occasions, Crowley successfully towed Orlan, a 312-foot concrete island drilling structure (CIDS), for drilling projects in Russia. The Orlan has a 34-foot draft and consists of four basic components – a steel mud base, a concrete brick caisson, and two steel deck barges on which the drilling rig, support equipment, and quarters are mounted.
Pulled by two Crowley Sea Victory class 7200 BHP, twin-screw, oceangoing tugs, and a third arctic-ice management tug, the first tow in 2001 moved Orlan from its stack site near Northstar Island, off Prudhoe Bay, Alaska, to Sovetskaya Gavan, Russian Federation. This relocation facilitated modifications to the structure as part of the Sakhalin 1 project in offshore Russia.
Crowley towed Orlan again in 2004 to Ulsan, South Korea, with two Sea Victory class tugs and a 19,000 BHP Smitwijs ocean tug, the Wolraad Woltemade, where she was outfitted as an offshore oil drilling and production platform. When the outfitting ended, Crowley performed the final tow with the same fleet back to Russia – this time to Sakhalin Island – in the summer of 2005.