Category Archives: OSCV
Advancement in technology is permitting the offshore oil and gas industry to move into progressively deeper and colder waters in remote locations. ULSTEIN supports this development by providing products and solutions that contribute to safer, smarter and greener operations.
A case in point is the versatile and flexible OCV/subsea vessel design SX121, which ULSTEIN is currently building customized versions of for GC Rieber Shipping and Island Offshore. The design can be tailored for a multitude of offshore construction and subsea operations in deep and ultra-deep waters both below and above the Arctic Circle.
Deepwater and ultra-deepwater projects occur outside of the continental shelf at water depths between 400 and 1,500 metres and depths greater than 1,500 metres respectively. Deep waters mean remote locations, harsh weather conditions and sensitive ecosystems. This type of environment requires vessels that are reliable and safe, cost-efficient and environmentally sound.
“We aim to develop ships that can operate reliably, safely and efficiently in harsh conditions with as small an environmental footprint as possible. The robust configuration, system integration and X-BOW® hull line of the SX121 ensure safety and comfort for the crew, an increased operational window and significantly reduced environmental impact,” says sales manager in Ulstein Design & Solutions, Lars Ståle Skoge.
Currently, there are four sailing SX121 vessels designed and built by ULSTEIN. The vessels, which operate in different segments such as offshore construction, riserless well intervention and inspection/maintenance/repair, have received very good feedback.
Gordon L. Wilkinson in Veolia ES said the following about ‘Viking Poseidon’’s work in the Gulf of Mexico: “She is the Queen of the Gulf.”
At the end of 2012 shipowner Island Offshore, together with their American partner Edison Chouest Offshore, ordered another SX121 vessel from ULSTEIN currently under construction at Ulstein Verft. “We’ve received very good feedback on our two operating vessels of this design, ‘Island Constructor’ and ‘Island Intervention’,” says Technical Manager in Island Offshore, Trond Hauge. “I’m confident that this type of vessel is a safe and comfortable platform for the performance of advanced work in the years to come.”
Optimized for heavier installations
“The SX121 is a compact vessel that can perform deepwater and ultra-deepwater operations for which currently larger vessels are frequently used, thus providing the customer with a more cost-efficient solution,” says Håvard Stave, Sales Manager in Ulstein Verft.
“The typical SX121 vessel operates at depths down to 3,000 metres, which comprises most current oil & gas activities. The need to deploy heavier equipment in deep waters such as offshore Brazil and Africa and in the Gulf of Mexico, has spurred market interest in OCV vessels with a 400-tonne crane, which we’ve now incorporated in the SX121 design.”
ULSTEIN has drawn on experiences from its latest SX121 projects, and optimized the utilization of the hull with regards to work from deck as well as crane construction work, resulting in an even more versatile OCV/subsea vessel.
The robust platform is optimized for efficient operations in deep waters with a crane capacity of up to 400 tonnes and a substantial remaining deck loading capacity, and it can be configured for a variety of mission equipment. There is a large deck area of 1,750 m2, and the area around the main moon pool is reinforced in order to sustain a VLS or module handling system. The ROV installation is designed and chosen for operations in significant wave heights of 4.5 metres or more. Two heavy-duty work ROVs are situated in the enclosed hangar, one to be deployed from the starboard side, the other through a dedicated moon pool.
A reliable vessel is key for cost-efficiency, as down-time and aborting on-going operations are costly affairs, particularly when operating far from shore.
The SX121 vessel meets the highest standard for position keeping, DYNPOS-AUTRO, with redundancy on all major components. Featuring the ‘Operation+’ concept, an increase in redundancy in AUTR operations if a single major failure occurs, the vessel will still maintain system redundancy throughout the most critical areas. The typical configuration is diesel electric propulsion powered by six identical medium speed main generator sets. The switchboard system, propellers and diesel motors can be configured in groups of two, three or four. If a major failure occurs, the vessel will only lose one third of its power and propulsion. The combination of system architecture and power stations, three side thrusters and three main thrusters, ensures that the operation can be safely completed using two thirds of its capacity.
Smart and safe
In order to optimize capacities and performance of the vessel, the freeboard has been increased by one metre compared with the previously built vessels of this design. This increase also improves safety and ensures a dry work deck. In addition, the helideck has been moved further back in order to increase the weather window for helicopter landings.
The vessel’s X-BOW provides good motion characteristics for safe operations. It also reduces the vessel’s environmental footprint through lower fuel consumption and reduced emissions. With optimized resolution of the power generation plant, the vessel will have high fuel efficiency in all operational modes.
The vessel accommodates a crew of 130 and complies with all international requirements for comfort and safety.
Norway’s DeepOcean has entered into a contract for long term charter of an offshore support and construction vessel (OSCV) from Rem Ship AS.
“DeepOcean is established as a leading subsea services and installation contractor in the North Sea. In order to maintain and strengthen our leading position in this market, we are currently investing in our fleet of owned and chartered vessels.” says DeepOcean AS President Mads Bardsen.
The new build is a MT6022 design, with length of 108 meters and 22 meters breadth. The vessel is scheduled for delivery in the first quarter of 2014.
In addition to the new build, DeepOcean has already chartered the Rem Forza from Rem Ship AS. The vessel will be fitted with an AHC offshore crane and two work class ROVs and associated Launch and Recovery Systems.
STX OSV Holdings Limited (“STX OSV”), one of the major global designers and shipbuilders of offshore and specialized vessels, has received an order for the design and construction of a large, advanced Offshore Subsea Construction Vessel (OSCV) for Ocean Installer and Solstad Offshore.
The contract value amounts to approximately NOK 1.4 billion. Ocean Installer and Solstad will have joint ownership of the vessel, which is to be operated by Ocean Installer. The vessel is scheduled for delivery from STX OSV in Norway in 2Q 2014. The hull will be delivered from STX OSV in Romania. The contract is subject to board approval by the Norwegian Guarantee Institute for Export Credits (GIEK), expected to be received on or around 20 June 2012.
The vessel, of type OSCV 06L, has been designed by STX OSV and Solstad in close cooperation with Ocean Installer, and is highly advanced in terms of station keeping, efficiency and operational performance. The vessel is designed to operate efficiently under demanding conditions and is well fitted for SURF (Subsea,Umbilicals, Risers, Flowlines) operations.
The vessel is 156.7 meters long, 27 meters wide and has an aft cargo deck area of 2,100 m2. She will be equipped with a 150 t Vertical Lay System (VLS) and a 3,000 t below deck carousel, Remotely Operated Vehicles (ROVs) in hangars launched through moonpools, and two AHC offshore cranes (400 t and 100 t) which both can operate down to depths of 3,000 meters. The accommodation facilities will have a capacity of 140 persons. The vessel is designed according to the latest environmental standards with focus on low fuel consumption.
Steinar Riise, CEO of Ocean Installer said: “We are very satisfied with placing the contract for this new-build, and are looking forward to developing our operations with this vessel, which is built for heavy construction work, and is highly advanced when it comes to station keeping, efficiency and operational performance. This investment is in line with our growth strategy, as the vessel is capable of conducting the full range of subsea construction operations in the global market. Moreover, this joint venture consolidates the strategic cooperation between Solstad and Ocean Installer”
Ocean Installer is a Norwegian subsea entrepreneur headquartered in Stavanger,Norway. Ocean Installer holds strong EPCI expertise within the SURF (Subsea, Umbilicals, Risers, Flowlines) segment and is rapidly expanding its operations andorganization within and beyond the North Sea basin. Solstad Offshore ASA is among the largest shipping companies in Norway, providing advanced vessels and extensive maritime competence for operations related to the offshore petroleum industry. The company has about 1,600 employees, and operates 50 vessels all over the world. Solstad Offshore is headquartered in Skudeneshavn, Norway and has branch offices in Brazil, Singapore, United Kingdom and Australia
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STX OSV Holdings Limited (“STX OSV”), one of the major global designers and shipbuilders of offshore and specialized vessels, has secured new contracts for the design and construction of two Offshore Subsea Construction Vessels (“OSCV”) for Siem Offshore in Norway.
The vessels will be of STX OSV’s OSCV 11 design. The vessels will have an overall length of 121 meters, a beam of 22 meters and will be equipped with a 250t AHC crane.
Deliveries are scheduled from STX OSV Brattvaag in Norway in 3Q and 4Q 2013. The hulls of the vessels will be delivered from STX OSV Tulcea in Romania. STX OSV also has two Platform Supply Vessels under construction in Brazil for the same customer.
Siem Offshore Inc. is an owner and operator of modern support vessels for the global oil and gas service industry. The Company has currently a fleet of 44 vessels, of which 5 are under construction. The fleet includes large Anchor Handling Tug Supply vessels, Platform Supply Vessels, and other support vessels. Siem Offshore is listed on the Oslo Stock Exchange.
- STX OSV Adds to their Backlog, DOF ASA Sends Newbuild Order for Subsea Construction Vessel (mb50.wordpress.com)
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Helix ESG’s reeled pipelay vessel, the Express, recently undertook its deepest work ever during a project in the Gulf of Mexico.
Working in the Lloyd Ridge Area of the Gulf, the Express laid 9,748ft of 6.6in diameter rigid pipeline from a starting depth of 8,960ft (2,731m) to an ending depth of 9,180ft (2,798m).
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