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Shell’s Olympus on Its Way to U.S. GoM Mars Field

Shell’s massive Olympus tension leg platform (TLP) set sail from Ingleside, Texas on 14th July, for a 425 mile trek to its final home on the Mars Field in the Gulf of Mexico.

For 10 days, tugboats will transport the over 120,000 ton platform to the location where work will begin to secure the platform in place. The Olympus TLP will be moored to the seafloor by tendons grouped at each of the structure’s corners and will float in approximately 3000 feet of water.

The Olympus TLP is Shell’s sixth and largest tension leg platform and will provide process infrastructure for two of Shell’s deep water discoveries, West Boreas and South Deimos. The project also includes pipelines that will be routed through West Delta 143C, the recently installed shallow water platform.

The Olympus TLP is expected to start production in 2014, producing at a rate of 100k boe.

Source

Heading for Ingleside,TX: Largest Heavy Transport Vessel for Largest Offshore Platform Hull

The Dockwise Vanguard, the world’s largest semisubmersible Heavy Transport Vessel (HTV) to date, safely completed its first ever float-on operation earlier this week.

The vessel, loaded with the World’s largest semisubmersible offshore platform hull, the Jack/St. Malo, is now on her maiden voyage carrying the near 56,000 metric ton hull on her deck.

The Dockwise Vanguard successfully executed the float-on exercise of the Jack/St. Malo platform hull at the Silli-Do deep hole near the Samsung Heavy Industries yard in Geoje, South Korea. “The float-on operation was precisely and safely executed as planned. It took no more than 4 hours before the cargo stood firm on her cribbing,” states Ronald Goetheer, Project Manager at Dockwise. After almost two days of sea fastening, the Dockwise Vanguard departed at sunrise on the 12th of February, and will navigate around Cape of Good Hope heading towards the Kiewit yard in Ingleside, Texas, USA, where it is expected to arrive mid-April.

Dockwise Vanguard

The Dockwise Vanguard is an innovative semisubmersible HTV that is redefining the limits of exceptional heavy marine transport. The vessel has been designed to enable operators and contractors consider opportunities for mega offshore units which were until now considered unthinkable. With the loading capacity of up to 110,000 tons, the vessel is designed to serve the top end market focusing on next generation offshore

Companies in the Oil & Gas industry can now specify much larger and heavier offshore structures, and these can be integrated at a single fabrication site. These mega structures can then be transported onboard the vessel to remote offshore locations, even in harsh climates where no commissioning facilities are available. This feature can help reduce costs and optimize the overall project. In essence, the new vessel will play an important role in the field development philosophy of Oil companies, since it will be capable of transporting fully integrated mega offshore units.

The vessel’s design is also expected to help operators and developers create value. With its capabilities, timely and risky phases of offshore projects can be managed prior to hookup and commissioning. Interface optimization, higher degree of risk mitigation, lower insurance premiums, improved schedule flexibility, and reduced time-to-production – as well as reduced offshore man-hours – are a few examples of opportunities. In addition, the vessel’s advanced technical capabilities enable it to offer a completely new service: offshore dry-docking.

Increasingly, FPSOs are being located in remote areas that lack support infrastructure. In this circumstance, an offshore dry-docking service can be specially valuable. The Dockwise Vanguard’s FPSO dry-docking capacity offers inspection, maintenance, and repair opportunities (amongst others) at different conditional modes. The FPSO could remain connected to its mooring and turret system while keeping the riser systems intact, with the possibility of continuing limited production. In this scenario, the FPSO will still be able to freely weathervane around the turret mooring, with controlled heading made possible by the vessel’s propulsion system. The vessels capabilities completely avoid or significantly reduce downtime.

Innovative Design

The vessel is specifically designed to exceed the Oil & Gas industry’s expectations. “From the drawing board, we decided to engineer a truly exceptional vessel unlike others in the market,” states Michel Seij, Manager Engineering at Dockwise.

The Dockwise Vanguard is engineered to surpass current heavy marine transport limitations. The vessel’s deck covers a surface of 275 m x 70 m (902 ft x 230 ft) and is equipped with movable casings. In addition, the accommodation block and navigation bridge are located on the extreme starboard side. The vessel has no bow, and this, along with other design features, gives the vessel a unique appearance.

In addition, the vessel has a dedicated design for ultra-heavy units weighing up to 110,000 metric tons. Optimized deck strength and extreme wide-load capabilities are at the heart of the design philosophy; as are the vessel’s stability characteristics. It is equipped with a 27 MW redundant propulsion system consisting of two fixed propellers at the aft and two retractable azimuth thrusters at the bow. These can reach a maximum transit speed of 14 knots, which translates to average service speeds of 11-13 knots with cargo. In addition, the vessel allows for 16 m (53 ft) water above deck, accommodating cargoes with a higher draft.

Largest Heavy Transport Vessel for Largest Offshore Platform Hull| Offshore Energy Today.

USA: Helix Sells Its Three Pipelay Vessels

Helix Energy Solutions Group, Inc. has agreed to sell its three pipelay vessels, the Caesar, Express, Intrepid and related equipment in separate transactions for total cash consideration of $252,750,000.

On October 15, 2012, Helix entered into an agreement to sell the Caesar, Express and related equipment to Coastal Trade Limited for a total of $238,250,000. The sale of these assets is expected to close in two stages as each vessel completes its existing contractual backlog. The Express closing is expected to occur in February 2013 and the Caesar closing is expected to occur in July 2013. Helix has received a $50 million deposit in connection with this transaction which is only refundable in limited circumstances. The closing of this transaction is subject to customary closing conditions.

In a separate transaction, on September 26, 2012 Helix sold its pipelay vessel, Intrepid, to Stabbert Maritime Holdings, LLC for $14,500,000.

Helix will retain its Ingleside, Texas spoolbase facility and provide pipelay spooling services to the market.

Owen Kratz, President and Chief Executive Officer of Helix, stated, “As we previously discussed, our strategy is to aggressively invest and grow our Well Intervention and Robotics businesses. We see the divestiture of our pipelay fleet as an important step in accelerating our corporate strategy.”

Subsea World News – USA: Helix Sells Its Three Pipelay Vessels.

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