01.05.2012

Largest Nautilus crane to date

Oil States Industries has launched its largest Nautilus marine crane so far, the Nautilus 7000L.

The first unit has been manufactured as part of a four-crane package to be mounted aboard Montco Offshore's Liftboat Robert, one of the largest pipe leg self-elevating liftboats in the world.

The 7000L has a maximum capacity of 500tons/453 tonnes at 10 metres radius on a 42.6 metre boom, which can be extended to 61 or 76 metres.

The crane was sized and designed to allow the Robert to lift and install offshore wind turbine generators. It will also be used for platform decommissioning, wire line, crane operations, pipe-laying and diver support platform.
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The liftboat Robert with the 453 tonne Nautilus 7000L crane on board

The new crane features a horsepower management system that matches load, speed and available horsepower across multiple function inputs. For example, it can detect if one or more of the motors is operating at maximum power and can make hydraulic system adjustments accordingly, in an effort to protect the motors. Three, 300HP electric motors add to the crane’s reliability by allowing full crane functionality with only two motors, thereby eliminating downtime in the event of a motor failure.

Charles Moses, senior vice president of Oil States Offshore products said: "The 7000L provides increased capacity for the expanding range of offshore activities our customers engage in. It has the size and capacity the industry is demanding along with very sophisticated control capabilities for highly precise manoeuvres."
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