WRS Tech’s Marine and Shipbuilding divisions are now delighted to be able announce that they were chosen to support work on the world's largest offshore vessel, Allseas' platform installation and removal behemoth Pieter Schelte, which has commenced sea trials near Daewoo Shipbuilding & Marine Engineering’s shipyard in Okpo, South Korea.
WRS Tech has been involved in the ambitious project since 2008 when it was in the design stage, supplying a number of expert Naval Architects, Structural engineers and Marine and Mechanical design engineers.
When, in June 2010, Allseas awarded the contract for building Pieter Schelte, which is a staggering 382 m long, 124 m wide dynamically positioned (DP) platform installation & decommissioning and pipelay vessel, to the South Korean shipyard Daewoo. WRS Tech was selected to stay with the project and successfully delivered a number of experts to work as part of the new build project team and as the project progress WRS Tech Shipbuilding team has also supplied a number of commissioning engineers.
The numbers attached to the Pieter Schelte’s technical abilities are impressive, she will have a topsides lift capacity of 48,000 t and a jacket lift capacity of 25,000t. Her pipelay tension capacity will be 2,000t thereby establishing her as the world’s largest pipelay vessel.
Delivery of the completed topsides lift and pipelay vessel is expected in the second half of 2014, ready for offshore operations early 2015. The jacket lift system will follow later.
Allseas has described how the largest vessel of its type in the world will do its unique job. Before it arrives on site the legs of the topside support structure are cut. When it rolls up, hydraulic clamps mounted on eight horizontal lifting beams at the vessel’s bow will have been adjusted to the exact dimensions of the platform legs.
Waves will rock the boat during the crucial operation but, thanks to its motion compensation system, the clamps will be motionless relative to the platform.
Once the clamps are connected, tension in the lift system is gradually increased to transfer the weight of the topsides from the jacket to the vessel. Then comes a rapid, 2-metre lift to free the topsides from the jacket, and the Pieter Schelte starts making its way to the Seaton Port of Able UK at Teesside, England, where the platforms will be dismantled.
WRS Tech have been thrilled to be part of this process and have enjoyed working closely with and for the project team to help deliver such a significant project which saw WRS Tech placing people on two continents. WRS Tech also enjoyed visiting the Shipyard in Korea and meeting with our contractors and the staff we had placed in the new build team.
Everyone at WRS tech would like to congratulate everyone who worked on the Pieter Schelte and wish them all the best of luck on their future endeavours. We would also like to wish the crew happy sailing.
For information on how the Marine and Shipbuilding divisions at WRS Tech supported this project please contact our office on +4423 9259 6893.
In November 2013 Allseas announced plans to build a second single-lift vessel larger than Pieter Schelte, to be delivered in 2020.It is intended for installation and removal of the very largest existing platforms.
For further information on the vessel please take a look at the following website which provided much of the information for this blog post: