DISCOVER Magazine #6

Seajacks. Tailored vessel solutions

Published in category: Offshore Wind
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John_Vingoe_Operations_Manager_Seajacks_UK_Ltd.John Vingoe
Operations Manager
Seajacks UK Ltd.

Offshore installation company Seajacks has a fleet of five self-propelled jack-up vessels, all providing a steady platform to ensure operations remain uncompromised by the conditions of the sea below. Seajacks Operations Manager John Vingoe highlights the benefits of operating a versatile fleet in what is a very competitive market.

The Seajacks fleet has grown steadily since the company started operations just over a decade ago. And whatever yardstick you use – crane capacity, deck area, deck loading capacity, sailing speed or accommodation – this expansion has gone hand-inhand with increasing performance and capabilities. The newest member of the fleet has the specs to prove this point: Scylla has a 1,500-tonne leg-encircling crane, usable deck space of up to 5,000m² and the ability to install components in water depths of up to 65 metres. Scylla joined sister vessels Kraken, Leviathan, Hydra and Zaratan to provide Seajacks clients a tailored vessel solution for any installation or maintenance requirements, ensuring projects are completed as efficiently and safely as possible.

Broad scope of workitle

The versatility of the fleet comes into play when the varied scope of offshore work is considered. For example, the more established wind farms require maintenance if a component becomes faulty. Moreover, this type of work is often required within short time scales. “We have a great deal of experience in establishing clients’ requirements and implementing solutions from full vessel provision with interface management to crew management and component exchange without input from the OEM,” says Mr Vingoe. “Our NG2500 vessels [Kraken, Leviathan, Hydra] are perfectly suited for this work and have successfully undertaken campaigns in the Southern North Sea which resulted in minimal down time.”

In terms of installation projects, keeping in mind the fact that key offshore wind components are getting heavier and larger than ever before, Scylla reflects Seajacks’ strategy to constantly work to stay ahead of clients’ needs. To this end, the 139-metre vessel is capable of transporting and installing six 8MW turbines per cycle. “And will be doing this shortly for Walney Extension wind farm – installing 40 8MW MHI Vestas turbines and 47 7MW Siemens turbines by using an innovative sea fastening and blade rack design throughout the project.”

Meeting deadlines

To keep its fleet in top condition or to prepare each vessel for its next contract, Seajacks regularly turns to Damen Shiprepair & Conversion as docking location. “Keeping the vessels active in this challenging market is the first consideration followed by any necessary upgrades,” notes Mr Vingoe. “We have worked with Damen for many years and have forged strong ties and good working relationships with their senior management and project managers. Historically, Damen is certainly one of our key suppliers for shipyard facilities.”

“We work together with a similar emphasis on safety and Damen always reacts positively to any suggestions for improvement during projects. They also understand the urgency of our business. The quality of work is good and most importantly, if mistakes are made, we always learn from them and work together to ensure they do not occur again in the future.”

Safety first

Over the years, Seajacks has visited a number of Damen’s yards: “Their yard in Amsterdam recently simultaneously accommodated four of our vessels. We carried out some Class UWILD inspections which were all safely conducted and well-managed; allowing costs to be controlled and kept to a minimum.”

To prepare Scylla for her next contract, Seajacks selected Damen Shiprepair Vlissingen to perform the demobilisation/remobilisation works. “The decision to go to the Vlissingen yard was based on safety, expertise and price. We have had a sound relationship with the yard management for a number of years so our decision to return was never really a difficult one. Logistically, the location is good for crew changes and the facilities are excellent. And, more important that any of that, safety at the yard is well managed. The range of available services suits our needs and prices are always competitive.”

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