Category Archives: CSV
The hull of the offshore construction and well intervention vessel “Polar Onyx”, built by the order from Norwegian company Ulstein Hull AS, has been launched at Shipyard Zaliv on May 31, 2013.
The hull is currently moored alongside the outfitting berth of the Ukraine-based yard and is waiting to be towed to Norway to the place of final completion.
The high-capacity vessel is designed for operations in harsh conditions and deep waters, with a length of 130 meters and a 25 meter beam. The vessel is built to the highest standard for dynamic positioning, DP2+, and is equipped with a 250t AHC offshore crane. It is also equipped with a 275t Vertical Lay System above a moonpool which is capable of installing flexible pipe and umbilicals to 3,000m water depth.
In total, during the six years of cooperation between Zaliv and Ulstein Hull AS, fourteen vessels have been built for work in the oil and gas industry.
When working in the most extreme offshore environments, crews have to be able to rely on the absolute integrity and performance of their vessels. Ulstein Group has joined forces with GC Rieber Shipping to offer the market a new standard in operational security and performance – a ship that refuses to accept failure, thanks to the pioneering ‘operation+’ philosophy.
GC Rieber Shipping, the Norway-based harsh environment shipping specialist, has charged ULSTEIN with developing a high-capacity subsea vessel based on its SX121 design. This NOK 800 million ship, ordered in June 2012, alongside an option for a sister vessel, has been commissioned in response to strong market desire for offshore construction support vessels (CSVs) for deep and harsh environments.
Reliability in the extreme
Alongside state-of-the-art features, equipment and performance figures, the vessel will give GC Rieber Shipping maximum operational availability – a vital characteristic for both the company and those chartering the ship. Downtime will be minimised thanks to the ‘operation+’ feature, an evolution of GC Rieber Shipping’s own ‘fail-to-safe’ design approach.
‘Operation+’ allows the vessel to continue to operate even if it has experienced a significant failure. Bjørn Valberg, GC Rieber Shipping’s Technical Director, explains more:
“Fail-to-safe means that even if a ship encounters a failure it is rendered in a safe condition. Our objective with this ship is to take that philosophy a step further,” Valberg comments.
“In the case of this vessel a single failure – such as a failure of a generator set, a single thruster or even an entire switchboard section (operating two generators and two thrusters) – will not threaten the redundant continuation of operations, giving charterers real peace of mind.”
Valberg illustrates this with a real-life scenario involving subsea flex pipe laying – an operation the new vessel is optimised for – where, if a single failure was encountered, a ‘standard’ ship would be forced to terminate operations as redundancy would be jeopardised.
“And of course,” he states, “if you are in deep waters with a substantial length of product, such as flex pipe, hanging from the ship, abandoning that operation is, well… it’s quite obvious how difficult, time-consuming and expensive that is.
“This new vessel, thanks to ‘operation+’ is protected against that scenario – it could continue with its assignment. That’s a hugely important characteristic of that vessel, helping the charterer meet the demanding expectations of the market.”
Configured for success
ULSTEIN’s design and solutions team has been working to turn this concept into reality and deliver the Holy Grail of minimal operational downtime and maximum efficiency and reliability.
Geir Sivertstøl, principal engineer electrical systems at ULSTEIN, says the vessel, equipped with three main thrusters and three side thrusters (for stationkeeping during pipe laying), is fully optimised for carrying out assignments without interruption.
He notes: ”The switchboard system, propellers and diesel motors can be configured in groups of two, three or four. In case of an AUTR operation (i.e. the occurrence of a single major failure), the vessel will only lose one third of its installed power package and propulsion, and will be able to complete the operation with two thirds of its capacity.”
“This,” he stresses, “in combination with the highest standards for dynamic positioning, DYNPOS-AUTRO, will ensure that charterers can look forward to operational standards that are custom made to tackle the world’s harshest – and potentially most resource rich – environments.”
Equipped, flexible, compelling
GC Rieber Shipping’s version of the SX121 (yard number 300 at Ulstein Verft) has been equipped to meet the most diverse requirements, in the most demanding of conditions.
The 130-metre long, 25-metre wide vessel can accommodate a crew of 130 and cut through deep waters with a top speed of 14.5 knots, while meeting all the latest environmental standards. She is equipped with a powerful 250 ton AHC (active heave compensated) offshore crane, perfect for lifting and lowering heavy equipment to and from subsea environments.
A large cargo deck creates the optimal environment for a variety of operations, ensuring that the vessel is well placed to meet the hugely diverse demands of the offshore construction market. It also offers the ability to carry two ROVs (remotely operated vehicles) – one that will be launched from the starboard side and the other through a moon pool.
In addition, the ship has been designed with SURF (subsea umbilical riser and flowline) capabilities and is prepared for the installation of a below-deck basket/ carousel with a 2500 ton capacity, as well as a 250 ton VLS (vertical lay system) for deployment through the moon pool.
It is, as Valberg stresses, a compellingly comprehensive package: “One of the main reasons for choosing the SX121 design from ULSTEIN was its inherent flexibility, which allows several types of operations and enables us to operate in a wider range of market segments. The fact that we can utilise the 250 ton crane to the maximum of its capability both in offshore and subsea lifts on this vessel was another deciding factor.”
GC Rieber Shipping’s vessel is, according to Tore Ulstein, deputy CEO in Ulstein Group, the ‘perfect project’ for ULSTEIN to show its renowned design and shipbuilding pedigree. Tore Ulstein notes that the business is well accustomed to developing and producing vessels that have the capability to minimise operational downtime, maximising customers’ profits.
He commented: “Our organisation has broad expertise in developing advanced high-capacity offshore vessels together with customers, so this project suits us perfectly.”
The SX121 is scheduled for delivery in the first quarter of 2014, boosting GC Rieber Shipping’s fleet (which was fully booked at the conclusion of 2011) of 18 advanced special purpose vessels, 12 of which are owned by the company.
CEO in GC Rieber Shipping, Irene W. Basili, has imparted that the new addition to the company will “strengthen our position in the high-end subsea segment” and that she is looking forward to receiving “a top-class vessel from ULSTEIN” – a sentiment that potential charterers will no doubt agree with.
Oceanteam Shipping ASA has announced that it’s new Lay Vessel, CSV North Ocean 105 which is jointly owned with J Ray McDermott (Norway) AS, has been delivered on time and has immediately commenced a five year time charter. The company’s fleet of CSVs now consists of four partially owned North Ocean Series concept vessels.
‘’We are very pleased with this successful delivery and the fact that the vessel starts to work for the Owners at once. The yard, McDermott and OTS have capitalized on our joint experience with this vessel series, says CEO of Oceanteam Shipping, Haico Halbesma’’
The five year time charter is with Eastern Marine Services Inc. a 100% subsidiary of McDermott. The vessel has been built and delivered by Metalships in Vigo, Spain.
The North Ocean 105 is the fifth vessel to be delivered with this concept developed by Oceanteam Shipping. The North Ocean series is one of the most advanced, able and successful, high-end Construction Support Vessel series to date. The series’ proven quality for advanced deepwater operations under the most demanding and harsh conditions has set a new industry standard.
Lay Vessel North Ocean 105 is the second vessel within the McDermott fleet of the North Ocean Series which is jointly owned.
CSV North Ocean 102, with its 7,000 tons horizontal lay system, has been working successfully on numerous McDermott projects since August 2010. Before delivery to McDermott the vesselwith successfully performed the Statoil Gjoia Power Cable installation and the BritNed interconnector powercable for ABB.
Facts: Lay Vessel North Ocean 105
Lay Vessel North Ocean 105 will be mobilized further by McDermott with an advanced 440 tons top tension vertical reel system for rigid and flexible pipelay for depths of up to 3,000 meters. The reel pay load will be a maximum of 2,975 tons in combination with a pipelay tower with 440 tons tensioner. In addition comes two A&R winch systems with capacity of 496 tons and 165 tons respectively.
The vessel has a length (LOA) of 145 meters, a beam of 27 meters, and has over 10,000 tons of deadweight with two portside AHC cranes installed of 440 tons and 110 tons for subsea lifts and construction support.
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