Category Archives: Dynamic positioning

Dynamic positioning (DP) is a computer controlled system to automatically maintain a vessel’s position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors and gyro compasses, provide information to the computer pertaining to the vessel’s position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include, but are not limited to, ships and semi-submersible Mobile Offshore Drilling Units (MODU) and Oceanographic Research Vessels.

Bully I Makes Debut in GOM

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by  Noble Corp. & Shell

Shell and Noble Corp. announced the Gulf of Mexico arrival of the Noble Bully I, a state-of-the-art offshore drilling rig that is designed to raise the bar in terms of safety and performance. The Noble Bully I (UDW Drillship) is the first of two Bully rigs, jointly designed by Shell and Noble, and can be equipped to drill in up to 10,000-feet of water.

The Bully rigs also feature a compact box-type drilling tower, known as a Multi-purpose Tower, instead of a conventional derrick. As the name indicates, a Multi-purpose Tower is designed to maximize productivity and safety, yet it allows for a significantly smaller vessel when compared to other deep water drill ships of similar capacity.

The ships also feature an attention to energy efficiency, use less fuel and are shorter and lighter than comparable drill ships. The Noble Bully I and Noble Bully II (UDW drillship), are dynamically positioned drill ships and can, therefore, be positioned at a favorable angle toward wind, waves, and currents, and feature ice-class hulls. Shell and Noble have increased the automated technology on the Bully rigs, increasing personnel safety on board.

The Noble Bully I has now arrived in the Gulf of Mexico from Singapore and will complete commissioning and acceptance testing this month before beginning operations. The Noble Bully I will first drill in Shell’s Mars B, Olympus, development while the Noble Bully II drill ship is expected to begin operations early next year in Brazil.

Source – RIGZONE

UAE: Drydocks World Wins Tanker-to-MVC Conversion Deal from AET

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Drydocks World has signed a contract with Singapore based AET, for two Tanker-to-Modular Capture Vessel (MCV) conversion projects. AET is converting these vessels as part of the Marine Well Containment Company’s (MWCC) well containment system.

MWCC is a not-for-profit, stand-alone organization with 10 member companies ExxonMobil, Chevron, ConocoPhillips, Shell, BP, Apache Anadarko, BHP Billiton, Statoil and Hess. The conversion will be implemented at the Drydocks World – Dubai facility.

The conversion shall allow the tankers to continue to operate normally as tanker in the US Gulf of Mexico, with capability to be deployed as MCV within shortest possible time. The first vessel is expected to arrive at the yard in December 2011 and the second vessel in February 2012. Each project will be completed within a period of nine months. Each vessel will handle about 100,000 barrels of liquid and about 200 million standard cubic feet of gas per day. The MCVs are capable of operating at depths of 10,000 feet.

The vessels will be equipped with new state-of-the-art containment system provided by Marine Well Containment Company. Conversion scope includes installation of 4 off power generators, 4 off retractable type azimuth thrusters one tunnel thruster, Dynamic Positioning, Pipe racks on deck and supports for Process Module, Flare tower, turret etc..

“We are extremely happy to sign this prestigious Contract with AET, a well-known global service provider, as part of our well-articulated strategy of building our presence in the oil, gas and energy industries. We already have an established reputation and strong expertise in carrying out sophisticated vessel conversion projects for world-leading companies. Our thrust on expanding our knowledge base and creating a technology-driven state-of-the-art facility has borne fruit and we are able to effectively serve the industry,” said Khamis Juma Buamim, Chairman of Drydocks World.

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Ukraine: Zaliv Launches Ulstein Design PSV Hull

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The hull for yno 294 at Ulstein Verft, a platform supply vessel of design type ULSTEIN PX121 for Blue Ship Invest, was launched by Zaliv shipyard in Ukraine on 30. November.

“This hull is hull number 500 from Zaliv, and this special occasion was celebrated with a great many invited persons”, comments project manager Per Svein Brekke from ULSTEIN. He was present along with the ship owner representative Odd Nordam and ULSTEIN´s site team in Ukraine, which consists of Magnar Kvamme, Anders Sundgot, Paul Myrvågnes, Igor Kogan, Yuriy Stoyev and Yuliya Sydorova.

Tow starts around mid-December, and is expected to arrive Ulstein Verft in January. The ship is scheduled for delivery in the third quarter of 2012.

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The Netherlands: Norwind Installer and Ulstein Join Forces on New Offshore Wind Foundation Installation Vessel

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Norwegian based NorWind Installer contracted the ULSTEIN Dutch design offices Ulstein Sea of Solutions and Ulstein IDEA Equipment Solutions as their design partners for a new foundation installation vessel for the offshore wind industry. The vessel is a customized version of the Deepwater Enabler design from ULSTEIN.

The DP vessel is designed for world-wide operations with a focus on pre-piling and jacket/tripod/transition piece installation for the offshore wind industry in North Europe. Different deck layouts, based upon NorWind Installer’s installation experience from Alpha Ventus, have been developed for the various installation modes on top of the generic vessel platform provided by ULSTEIN.

The approach for this design has been unique in the sense that NorWind Installer and ULSTEIN started this project by going through the ULSTEIN Accelerated Business Development process. Technical and operational options from both NorWind Installer and ULSTEIN were discussed in a transparent process resulting in the most viable option, which met NorWind Installer’s business model and requirements.

”We are pleased with the concept as it is definitely in line with our vision of combining state-of-the-art technical solutions with the speed and seakeeping capacity of DP vessels. It gives us the opportunity to provide our installation services all-year around in up to 2.5m Hs, as well as meeting our client’s cost targets”, states Thorbjørn Hansen, VP Product Development at NorWind Installer.

The Netherlands: Norwind Installer and Ulstein Join Forces on New Offshore Wind Foundation Installation Vessel

The vessel is designed aiming for maximum efficiency and cost effectiveness and features an 800t heave compensated offshore crane on starboard side, while a pre-piling template can be located on a support structure at the stern. The vessel can carry four jackets, alternatively at least 24 piles or up to 12 transition pieces on the large open aft deck.

To enhance vessel operability, the anti-heeling system has been designed in such a way that the main crane can revolve over 180o with a full load in its main hook within 5 minutes, which is very favorable having a large jacket in the crane hook.

When operating in the pre-piling mode, the pre-piling template is positioned on the seabed by the main crane, in parallell a pile is picked up by a gantry crane, put in the upending frame on starboard side and upended. The main crane has been modified by ULSTEIN in such a way that it can first pick-up the piling hammer with its main hook and then connect to the upended pile with its auxiliary hook. When the hammer is working on driving the pile into the seabed, the next pile is upended by the upending frame and made ready for crane lift out.

The large aft deck and AHC crane provide flexibility for serving alternative subsea and offshore markets in the future, which is further increased by the two large holds suitable for carroussels located below main deck. A deck layout version of the vessel has also been developed for tidal turbine installations.

Voith Schneider propellers of 3,900 kW each will allow for a cruising speed of 13 knots and enhance the DP capabilities of the vessel. To minimize the environmental footprint an NOx reduction system is installed in the exhaust lines.

“After working closely with NorWind Installer in the ABD process, ULSTEIN started developing the integrated concept for mission equipment and vessel. This project shows the combined strength we can offer to support our clients in realizing their visions”, says Edwin van Leeuwen, project manager at ULSTEIN.

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Norway: Subsea 7 Charters Island Intervention Vessel

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Island Offshore has secured contract for its  subsea construction vessel Island Intervention. The vessel has begun the charter with Subsea 7 , the international provider of Subsea, Umbilical, Riser and Flowline  (SURF) services.

The operations are expected to take up to three weeks.

The vessels duties involve light construction, crane, ROV, survey and positioning operations related to the tow out and positioning of two bundle tows of respective 7 and 5 km’s in length.

Island Intervention will be used as a command and control vessel and the whole operation involves in total 6-7 vessels.

“Island Offshore is pleased to be awarded this work by Subsea 7.” said the company on its website.

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