Mariner jacket departs Spain for North Sea

Offshore staff

CADIZ, Spain – The steel jacket for the Statoil-operated Mariner A platform has left the Dragados yard in southwest Spain and is in transit to the North Sea.

Construction started in October and was completed in May this year, on time and within budget. The134-m (439-ft) high steel jacket, with a footprint of 88 x 62 m (289 x 203 ft), is the largest steel jacket ever built for a Statoil project.

It weighs 22,400 metric tons (24,692 tons) including floatation tanks and rigging.

The jacket was loaded-out onto the S44 barge, pulled by the main tug Skandi Iceman, and safely entered the channel of Bahia Cadiz. The 1,835-nautical mi journey to the Mariner field, located 150 km (93 mi) east of the Shetland Isles, is expected to take around two weeks. 

On arrival the jacket will be launched from the barge, ballasted to a certain angle to enable it to slide horizontally into the sea. Subsequently it will be upended and maneuvered into the correct position on the seafloor by the heavy-lift vessel Saipem 7000.

Finally the jacket will be secured by 24 piles. Topsides installation should follow in 2016, forming the completed production, drilling, and quarters (PDQ) platform. Development drilling will be performed from the PDQ drilling rig, initially assisted by a jackup.


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