SUBSEA SECTION TITLE TECHNOLOGY
First Subsea’s Internal Lifting Tool (ILT)
mitigation systems for deployment offshore New Zealand. Te firm’s latest system alleviates the impact of modern, large blowout preventers (BOPs) on legacy wellheads by arresting the motion of the BOP stack via four tethers, which are anchored to the seabed. Te Tethered BOP system arrests the motion of the BOP stack above the wellhead, substantially reducing wellhead cyclic stresses and enhancing fatigue life. Depending on the specific riser and wellhead configuration, fatigue life has been improved by as much as 1,000 times the original unmitigated wellhead fatigue.
installation ROVs. Ashtead Technology used a range of measurement sensors and positioning tools along with special techniques to enhance the accuracy of the data collected, ensuring maximum performance of the system.
MANAGING FATIGUE In wellhead technology news, Trendsetter Vulcan Offshore (TVO) has contracted with Tamarind Resources to provide its next-generation wellhead fatigue
Trendsetter Vulcan Offshore’s next-generation wellhead fatigue mitigation system
An added benefit is the increased limits to the rig watch circle, particularly in shallow water, where watch circles can be very restrictive. Te TVO system will be combined with
a wireless monitoring system based on Sonardyne’s highly configurable, low-power Subsea Monitoring, Analysis and Reporting Technology (SMART).
HEAVY LIFTING First Subsea has been awarded a contract to supply three Ballgrab Internal Lifting Tools (ILT) to well-known pipelay, heavy lift and subsea construction company Allseas. Te tools are designed for lifting loads up to 900mT and will be used by Allseas for offshore decommissioning projects. Te tools are designed to be inserted into a tubular receptacle attached to the structure to be lifted. Te specific ILT tools for Allseas will cover an internal receptacle diameter range from 660mm to 1524mm. Te first planned offshore operation will be the Tyra Redevelopment Project in the Danish North Sea, when the ILT tools will be used to lift the top jacket structures for Tyra East D Flare Jacket and Tyra West D Flare Jacket.
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