This paper (SPE 173892) was revised for publication from paper OTC 25335, first presented at the Offshore Technology Conference, Houston, 5–8 May 2014. Original manuscript received for review 20 June 2014. Revised manuscript received for review 27 October 2014. Paper peer approved 4 November 2014. Summary Steel catenary risers (SCRs) on a large-heave-motion vessel are susceptible to compression...

The fatigue assessment of mooring lines for floating offshore wind turbines represents a challenging issue not only the reliable design stationkeeping system but also economic impact on installation and maintenance costs over entire lifetime farm. After brief review about state-of-art, nonlinear time-domain hydrodynamic model moored by chain cables is discussed. Subsequently, damage in outlined...

There is a huge energy demand from offshore renewable resources. To maximize the use of various sources, combined floating system consisting different types devices an ideal option to reduce levelized cost (LCOE) by sharing infrastructure platform and enhancing power production capacity. This study proposed concept systems combing heave-type wave converter (WEC) with semisubmersible wind turbin...

Statoil has designed and tested dual diameter pipeline pigs to perform various tasks during operations, precommissioning and commissioning of the 710km 42"x28" Åsgard pipeline. The concepts developed have been put through a major design and testing program to demonstrate that the various functional requirements have been met. The paper describes the development process as well as field experien...

Floating offshore wind is an emerging technology that holds considerable potential to utilise areas deeper than 60 m for sustainable energy generation. As the floating turbine industry continues develop and grow, capabilities of established port facilities need be assessed as their ability support expanding construction installation requirements. This article assesses current infrastructure req...

To maximize the utilization of ocean resources, shorten return period investment and directly supply energy to fishing cage, this paper performs a preliminary study for state-of-the-art concept integrating floating offshore wind turbine with cage. An octagonal semisubmersible rigid cage slack catenary mooring system is designed match NREL 5 MW baseline turbine. Combined blade pitch controller, ...