Edison Chouest to supply new deepwater diesel-electric fleet

The Edison Chouest Offshore family of companies plans to design and build a dozen 300-ft (91-m), 5,300 DWT deepwater diesel-electric offshore supply vessels.

Offshore staff

GALLIANO, Louisiana -- The Edison Chouest Offshore family of companies plans to design and build a dozen 300-ft (91-m), 5,300 DWT deepwater diesel-electric offshore supply vessels.

The current Chouest 280-ft (85-m) supply vessels feature two CAT diesel engines, rated at 7,200 HP. The new design will feature four 1,700 kW generators providing power to two 2,500 kW variable speed electric motors. The vessels will also have four 1,050 kW tunnel thrusters, two at the bow and two at the stern.

The new design has an increased length of 20 ft (6 m) over the current series, while the beam remains at 60 ft (18 m) and the depth increases from 24 to 26 ft (7 to 8 m). The deadweight tonnage increases from 4,750 LT to 5,300 LT, and the deck cargo capacity increases from 10,000 to 11,000 sq ft (929 to 1,021 sq m).

Tank capacities also increase in several instances: Liquid mud capacity increases from 13,000 bbl to 16,000 bbl, and rig water available onboard increases from 105,000 gallons to 571,000 gallons. The new design also features increased tankage opportunities for specialized chemical products.

All necessary equipment for the first six diesel-electric vessels has been ordered, with equipment for the second half of the new OSV fleet currently being negotiated, the company says.

Chouest hopes that first steel will be cut for the first vessel in the series by Sept. 1. Ten OSVs will be constructed at Chouest’s US-based shipyards, while the remaining two will be constructed at the Chouest-owned Navship yard in Navegantes, Brazil.

08/07/2009

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