Oslo-listed offshore vessel owner Subsea 7 has extended a diving support vessel (DSV) frame agreement with UK North Sea clients.
It said the extra three years are worth between $50m and $150m.
The company signed the original contract in 2009 with Chevron, Dana Petroleum, Hess Denmark APS, Nexen Petroleum, Repsol Sinopec Energy and TAQA Bratani.
It will continue to provide DSVs on a year-round basis, as well as associated project management and engineering services for up to 50 offshore facilities in the North Sea.
