McDermott Derrick Barge 27 Upgraded to 2,400-Ton Lift

McDermott International, Inc., New Orleans, La., Derrick Barge 27 now has a lift capacity of 2,400 tons, the largest in the Middle East. Recently, the derrick barge underwent a conversion and upgrade to a combination derrick/ lay barge.

The newly installed Clyde Iron Works Crane lifts 1,400 tons fully revolving, 750 tons with its auxiliary block, 250 tons with its jib block, and 2,400 tons with the crane in a stationary position over the stern. For piledriving, Derrick Barge 27 has a 2,000-hp boiler which produces enough pressure to drive the largest hammers currently available.

When pipelaying, Derrick Barge 27's center slot assembly area can be completely enclosed against bad weather. Two gantry cranes for pipe handling, each capable of lifting 65 tons, track on the starboard and port sides of the barge, respectively. The assembly line can handle pipe up to 40 inches in outside diameter with pipe coatings of up to 1,500 pounds per linear foot. The line has six welding stations and three additional stations for corrosion- coating, repair, and X-ray inspection to ensure uninterrupted pipelaying. An adjustable- height stinger hitch allows pipe to be lowered or retrieved if operations must be suspended.

Derrick Barge 27 is a U.S.-flag vessel, ABScertified for unrestricted ocean service, and is subject to U.S. Coast Guard inspection. The barge's dimensions are 420 feet by 138 feet by 28 feet. It operates in the Arabian Gulf, Gulf of Suez and off the coast of India.

Maritime Reporter Magazine, page 47, Oct 1983

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