In recent years, the offshore oil exploration and exploitation are being approached from shallow water to deepwater, even to the ultra-deepwater.
近年来，海洋油气勘探开发已从浅海走向深海，甚至超深海。
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The design concept consists of a hybrid composite and metallic/ polymer flexible pipe with optimized mass per unit length for ultra-deepwater applications.
Rival John Wood Group Plc climbed 6.4 percent to 415.6 pence and Seadrill Ltd., operator of the second-largest fleet of ultra-deepwater rigs, gained 1.6 percent to 163.1 kroner.