In 1996, the Company completed 2 new platforms for Bass Strait but unlike the previously built rigs, these were floating concrete drilling platforms designed to be sunk and refloated rather than permanently submersible steel jackets. Weighing about 100,000 and 45,000 tonnes respectively, these were the biggest and most complex to be built for the BHP/Esso consortium. Both rigs took three years to construct before being towed 600 kilometres by seagoing tugs from Port Kembla, NSW, to their final destination in Bass Strait.
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