The Harvey Power, the second LNG-fuelled OSV operating in the United States, is now fully in service. The vessel is working for Shell Upstream America’s deep water operations in the Gulf of Mexico.
Harvey Power is the second of six LNG OSVs being built for Harvey Gulf International Marine by Gulf Coast Shipyard Group (GCSG), and like its sistership Harvey Energy, Harvey Power is capable of operating on LNG or diesel fuel.
Along with being able to operate on LNG, it also meets the criteria of the ABS Enviro+ Green Passport notation. When operating on LNG, these vessels exceeds the new Tier IV emissions regulations requiring lower sulfur oxides and nitrogen oxides emissions as part of the North American Emission Control Area (ECA).
The vessel will refuel with LNG at Harvey Gulf’s new LNG bunkering facility at Port Fourchon in southern Louisiana which allows access to more than 600 oil and gas rigs and platforms within a 40-mile radius.
Running on 99 percent LNG fuel (it is dual fuel), Harvey Power is a 310 x 64 x 24.5 foot platform supply vessel powered by three Wärtsilä 6L34DF dual fuel gensets, providing 7.5MW of power and fueled by a Wärtsilä provided LNGPac system. With 5,219 metric tons of deadweight the vessel is capable of carrying 253,000 gallons of fuel oil, 18,000 bbls of liquid mud, 1,600 bbls of methanol, 10,250 cubic feet of dry cement and 73,000 gallons of LNG fuel.
When operating on LNG the Harvey Power can operate in excess of 19 day in normal Gulf of Mexico rig supply mode between refueling.