Marine Link
Monday, October 23, 2017

Mooring

Lifetime Assessment for Deepwater Moorings

Photo: SBM Offshore

Mooring integrity is an important concern in the offshore industry [1]. Mooring leg failures can have  significant consequences, such as temporary shutdowns and require unplanned, thus expensive, repairs. On the other hand, an over dimensioned design leads to higher loads acting on the floating facilities and a large investment.   Meanwhile, the development of deepwater projects has led to the discovery of the new fatigue mechanism of ‘Out of Plane Bending’ [2]. This means that the design of moorings requires more detailed analysis to ensure the integrity of the mooring system.   Mooring lines very much behave in a non-linear way. This is the result of, for example, the lifting of the mooring line from the seabed and the loads from the flow around the mooring line. A spectral fatigue assessment is not capable of fully incorporating these effects. A time-domain approach is a more accurate methodology to assess fatigue lifetime.   At MARIN the in-house developed tool aNySIM XMF is used for the time-domain fatigue assessment of deepwater floaters. aNySIM defines mooring lines as a combination of chains, wire ropes and/or synthetic ropes The mooring lines are described using a lumped-mass model, which includes the inertia of the mooring lines, as well as local forces, such as drag acting on the moorings

MTNW Supports Frontier Drilling

Photo courtesy Measurement Technology NW

Measurement Technology NW (MTNW) has recently completed a contract to provide installation, calibration and commissioning on an eight-point mooring monitoring system for Frontier’s drill ship, Duchess, off the coast of Nigeria. The new running line tensiometer and LCI-90 mooring monitoring system provides visibility into line tensions which will support mooring and rig movement monitoring. The Duchess is a 475 ft by 75 ft vessel which needs to stay centered over an offshore oil-well

BP, CSO Aker Marine Team For Unique GOM Installation

CSO Aker Marine Contractors, Inc. (CAMC), one of the Houston-based entities of the Coflexip Stena Offshore Group, announced the successful mooring of Diamond Offshore's rig the Ocean Confidence using a preset taut leg mooring with polyester rope and CAMC's SEPLA anchoring system while under contract to BP. The mooring location is in the Gulf of Mexico in 6,385 ft. (1,946 m). The project represents a significant advancement in deepwater mooring.

Cargotec Secures Vietnamese Pipelayer with Mooring Solutions

A contract for mooring equipment for a pipelaying barge marks Cargotec’s successful entry to the Vietnamese offshore market. In July this year, Cargotec won a contract from the joint stock company Vinh Nam (VAM JSC)/TECMACH  to supply mooring equipment outfits for Vietsovpetro’s 110m-long by 30.5m-breadth pipelaying crane barge, Con Son. The 1969-built vessel is currently undergoing a conversion at Dung Quat Shipbuilding Industry Co Ltd.

Lankhorst Ropes Announces Cut-Resistant Jacket Research Project

Lankhorst Cut-Resistant Jacket (Photo: Lankhorst)

Lankhorst Ropes Offshore Division is undertaking a research project into the development of cut resistant jackets for mooring ropes in the Norwegian and Barents Seas. The project will be used to assess materials needed to reduce the effects of fishing trawler lines on synthetic fiber mooring lines. Deepwater moorings, beyond 800m, in the Norwegian and Barents Seas are subject to extreme weather and wave conditions. The synthetic mooring ropes must provide high abrasion resistance and be

Automated Mooring Systems Order for Cavotec

Cavotec wins order to supply 18 MoorMaster automated mooring units for a Mediterranean Sea port. MoorMaster is a vacuum-based automated mooring technology that eliminates the need for conventional mooring lines. Remote controlled vacuum pads recessed in, or mounted on, the quayside, moor and release vessels in seconds. Under the terms of the contract, Cavotec will engineer, manufacture, install and commission 18 MoorMaster MM200C units

New Offshore Equipment Contracts for Maritime Pusnes

The Aker Kvaerner subsidiary, Maritime Pusnes, has had a busy start to the new year winning contracts for over NOK 180 million. The contracts involve both marine and offshore equipment demonstrating MP's strength in both these market sectors. The contract awards comprise: Two contracts to supply mooring and riser pull-in equipment for a Floating Production, Storage and Offloading (FPSO) vessel that will be located off the coast of Angola

InterMoor Opens New Mooring Equipment Yard

InterMoor Singapore Yard.jpg

InterMoor, an Acteon company, has opened its new mooring equipment yard at Loyang offshore supply base in Singapore.   The new facility provides mooring equipment storage and an ideal support location for maintenance, preparation and mobilization. Allowing easier access, this purpose-built yard will meet customers’ needs better and will provide a safer working environment for InterMoor staff. It will play a pivotal role in the company’s development plans for South East

GM Deep Sea Mooring Secures Det Norske Oljeselskap Contract

Deep Sea Mooring Will Supply Mooring Equipment Services To Safe Zephyrus Semi-Submersible Accommodation Vessel (Photo: Global Maritime)

Global Maritime Deep Sea Mooring, a provider of offshore mooring services in Norway, has signed a contract with Norwegian operator Det norske oljeselskap to support Prosafe’s semi-submersible Safe Zephyrus accommodation rig in the Ivar Aasen North Sea field. The contract also includes support to the Maersk Interceptor ultra-harsh environment jack-up rig.   Deep Sea Mooring, which has already installed the pre-lay system

Ichthys Explorer Moored off Western Australia

The world’s largest semi-submersible platform, the Ichthys Explorer, has been safely moored in the Ichthys Field, 220 kilometers off the north coast of Western Australia, where it will be located for 40 years, as part of the INPEX-operated Ichthys LNG Project.   Bardex Corporation supplied four moveable Chain Jacks and 28 underwater Barlatches to support the handling of 28 mooring lines. The mooring operation was completed ahead of schedule with the assistance of Bardex lifecycle

Trelleborg Suite Supplied to Prelude FLNG

Prelude FLNG (Photo: Trelleborg)

Trelleborg’s marine systems operation has supplied a suite of products to Shell’s Prelude FLNG facility, the largest offshore facility ever constructed. Prelude, which is 488 meters long, 74 meters wide, and made with more than 260,000 tons of steel, will extract and liquefy natural gas from a site in North West Australia.   Trelleborg supplied its gas transfer technology and SafePilot navigational and piloting systems for Prelude.  

MacGregor Inks Deal to Service Teekay Vessels

MacGregor has signed a five-year frame agreement with Teekay Shipping Ltd to provide spare parts, maintenance, training and project support for approximately 115 of Teekay's vessels.   The agreement was signed during the second quarter of 2017, and will see MacGregor, part of Cargotec, provide spare parts, maintenance, training and project support for hatch covers, hose-handling cranes, general-purpose cranes, offshore mooring/loading systems, deck machinery winches

Keppel Wins SBM FPSO Conversion Deal

As energy markets start to rebound, Keppel Shipyard Ltd. secured a Floating Production Storage and Offloading vessel (FPSO) conversion contract from  SBM Offshore N.V. (SBM Offshore). The contract calls for a VLCC to be converted into an FPSO, to be deployed to the Liza field, located approximately 193km offshore Guyana in the Stabroek block. The shipyard's work scope includes refurbishment and life extension works, such as the upgrading of living quarters

Operations Partially Resume at Port of Durban

Marine functions at South Africa’s largest port have partially resumed after severe weather halted operations and caused heavy damages at the port earlier this week.   The Transnet National Ports Authority (TNPA) said the storm blew containers into the bay, broke mooring lines in the channel and caused three vessels to run aground in the Port of Durban on Monday.   Sounding surveys indicate that there is some obstruction on the seabed that could pose a risk to navigation

WSS: Digital Solution Focus @ Norshipping

(Image: Wilhelmsen Ships Service)

Wilhelmsen Ships Service (WSS) are bringing the maritime digital solutions of the future to life at Nor-Shipping. Unveiling their augmented reality (AR) project at the world’s biggest maritime show, this immersive, interactive tool enables visitors to view the company’s very latest products and systems, inside and out.   Developed in conjunction with Austrian technology company Imagination Computer Serv

Rapp Marine Deck Equipment Rounds out New Harley Barges

Photo: Rapp Marine

Rapp’s workboat market offerings span the full range of operator requirements. Their latest contract provides a turnkey package.   Long known for delivering innovative and custom deck machinery solutions to a wide range of marine stakeholders, Rapp Marine recently was tasked with providing not one, but two complete equipment package for West coast-based Harley Marine Services (HMS). The Rapp portfolio spans the full gamut of machinery

Cavotec Automated Mooring and Charging for E-Ferries

MoorMaster MM400E15 units (Photo: Cavotec)

Cavotec's MoorMaster automated mooring and Automatic Plug-in System (APS) are set to enter service with a hybrid battery-powered ferry in Finland, delivering substantial operational efficiencies and reducing environmental impact. The Electra, operated by FinFerries, is 90m long, 16m wide, and carries up to 90 vehicles. It makes crossings at 15-minute intervals during the day, and one round trip per hour at night, year-round and in all weather conditions between Parainen and Nauvo in

Vryhof Makes Two Senior Appointments

Evan Zimmerman and Clément Mochet (Photo: Vryhof)

Anchoring and mooring solutions provider Vryhof has made two senior appointments: Evan Zimmerman as Vryhof’s new Vice President and Chief Technology Officer and Clément Mochet as new Commercial Director for Vryhof’s business unit, Vryhof Anchors.   Based in Houston, Zimmerman has been tasked with pushing improvement within Vryhof’s technology, management systems and engineering capabilities

Shell's FLNG Facility Sets Sail for Australia

The Shell FLNG underway (CREDIT: Shell)

Royal Dutch Shell's Prelude floating liquefied natural gas (FLNG) ship has left a shipyard in South Korea for its destination offshore northwest Australia, the company said on Thursday.   Shell's $12.6 billion Prelude project is expected to start operating next year, the company said, after long delays since the oil major first decided to go ahead with the project in 2011.   Once the facility arrives in Australia

Load Cells for Offshore Mooring Project

TSM Molène and TSM Penzer. (Image: Iroise Mer/Straightpoint)

French maritime engineering specialist Iroise Mer used a 50 ton Straightpoint Radiolink plus (RLP) load cell during a refit of a tanker mooring system located 500m off the Corsica coast, recently. Iroise Mer's job was to update the site, comprising four different mooring lines, complete with anchors, chains and concrete deadweights, and all existing components had to be removed and new ones installed. The RLP was used to measure pre-tension up to 30 ton to check new anchors were properly

Marsol Signs Two-Year OOCEP Contract

Photo: Marsol International

Marsol International, a UAE-based global marine solutions provider focused on the offshore oil terminal market and related infrastructure, has signed a two years contract with Oman Oil Company Exploration & Production LLC (OOCEP) for the provision and management of the marine and offshore activities related to the tanker loading, via the single point mooring (SPM) offshore marine terminal including maintenance works, vessels, equipment and manpower.

Chandrasekharan Joins Viking SeaTech

Kiran Chandrasekharan (Photo: Viking SeaTech)

Viking SeaTech said it has appointed Kiran Chandrasekharan to a newly created post of naval architect at its base in Aberdeen.   Chandrasekharan, who has more than seven years’ experience, specializes in permanent mooring design. Prior to joining Viking SeaTech he worked as naval architect and mooring engineer for London Marine Consultants Ltd.   The new position was created to provide technical support and to assist in the commercial evaluation of tenders and proposals

Simulated Maneuver of Shell’s Prelude FLNG Facility

HR Wallingford simulation (left) and photograph by Shell (right) of the Prelude tow with POSH tugs (Photo: Shell)

At 488m in length, and longer than four football pitches, Shell’s Prelude FLNG facility was always going to represent a formidable challenge even for the skilled tug masters who were charged with towing the facility from the shipyard in South Korea where it was constructed, and delivering it to its final destination, a remote gas field 475 kilometers off the coast of Western Australia. But practice makes perfect, and HR Wallingford, using its Australia Ship Simulation Center in Fremantle

2017 IMO Award for Exceptional Bravery at Sea

Image: International Maritime Organization (IMO)

 Two members of the Houston Pilots in the United States are to receive the 2017 International Maritime Organization (IMO)  Award for Exceptional Bravery at Sea.    The pair will be recognized for their role in averting a major tragedy when the ship they were piloting broke down and burst into flames after colliding with mooring dolphins.   Despite being surrounded by a towering wall of burning fuel for nearly 90 minutes, pilots Captain Michael G

Vryhof Expands Its Global Footprint

Mo Tafazzoly (Photo: Vryhof)

Vryhof, a provider of anchoring and mooring solutions, said it is expanding its global footprint with its companies Deep Sea Mooring (DSM) opening a new office in Aberdeen and Vryhof Anchors appointing Singapore-based Franklin Offshore as its exclusive representative for selling Vryhof solutions in a number of Asia Pacific countries.   “In an industry that has seen considerable negativity over the past year

Maritime Reporter Magazine Cover Oct 2017 - The Marine Design Annual

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