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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


Aker Kvaerner to Deliver Pusnes Mooring Equipment

Aker Kvaerner has been awarded a contract for delivery of mooring winches and fairleads for Statoil's Gjøa Semi. The total contract value for Aker Kvaerner. The work will be undertaken by the Aker Kvaerner subsidiary, Aker Kvaerner Pusnes in Arendal. The contract involves supply of on-vessel mooring equipment for Statoils Gjøa Semi to be installed at the Gjøa field in the North Sea. The equipment, Roller Ram Winches and Fairleads for chain are to be delivered and installed at Aker


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


Wightlink Installs New Mooring System

Wightlink’s Head of Business Operations Sean Millward with the MoorMaster units. Photo: Wightlink Ferries

 Work will start shortly to install a sophisticated state-of-the-art mooring system at Wightlink’s car ferry terminals in Fishbourne and Portsmouth.    This is part of the company’s £45million investment in a new hybrid battery ship for the route and improvements


Glosten Promotes FitzGerald to Principal

Ken FitzGerald (Photo: Glosten)

Seattle-based naval architecture and marine engineering consultancy Glosten has promoted Ken FitzGerald to Principal.   FitzGerald is a graduate of Louisiana State University (BS, Petroleum Engineering, 1992), and joined Glosten in 2003 after 13 years working in commercial oceanography


Ship Design and Construction Matters

Photo: International Maritime Organization (IMO)

 ​The Sub-Committee on Ship Design and Construction (SDC) meets for its fourth session this week (13-17 February).    Key topics on the agenda include the expected finalization of draft explanatory notes to the SOLAS chapter II-1 subdivision and damage stability regulations and


Russian Frigate Heads to Med on Syria Mission

File Image (CREDIT: AdobeStock)

The Russian frigate Admiral Grigorovich left the port of Sevastopol in Crimea on Monday for the Mediterranean where it will join the country's naval forces deployed near the Syrian coast, a Russian source told Reuters.   The source did not provide further details


Palfinger Wins Deck Equipment Package

Illustration of Havyard 832 MPV, where Palfinger Marine will deliver and extensive deck equipment package of cranes, winches and offshore equipment. (Copyright: Palfinger Marine GmbH, Havyard Group)

Palfinger Marine signed a contract with Turkish shipyard Cemre to supply a deck equipment package to a Havyard 832 MPV vessel being built for Esvagt. The package from Palfinger consists of cranes, winches and offshore equipment. The MPV will measure 81.9 x 17.16 m, with a  deck area of 620 sq


Why Do Accidents Happen in Oil Industry?

Photo: DNV GL

 As the oil and gas industry strives for cost effective execution in projects and operations while maintaining a high focus on safety and environmental footprint, innovative and smart solutions are needed more than ever.    By extracting data and knowledge from all the detailed


ACE Winches Introduces New 500te Linear Winch

Photo: ACE Winches

At this year’s Offshore Energy exhibition, global deck machinery specialist ACE Winches announced a new 500te Linear Winch to its range of specialized deck equipment. The company will showcase its range of products and services supplied to European clients operating within marine


Edison Chouest to Build 13 Damen Tugs

Image: Damen

Marine transportation provider and the United States’ largest operator of OSVs, Edison Chouest Offshore (ECO), has teamed up with Damen to build 13 heavy duty mooring assistance and escort tugs. The vessels will be built in the U.S. using ECO’s network of five shipyards with support


Keppel to deliver third FPSO for Shapoorji Pallonji, Bumi Armada JV

Bumi Armada Courtesy Bumi Armada

Keppel Offshore & Marine's (Keppel O&M) wholly-owned subsidiary Keppel Shipyard Ltd (Keppel Shipyard) is on track to deliver a Floating Production Storage and Offloading (FPSO) vessel to Armada Madura EPC Limited (Armada Madura), a joint venture between Shapoorji Pallonji Group (Shapoorji


Tech File: BoomVane - A Powerful Boom Deployment System

Photo: Elastec

The BoomVane is one of the most useful and interesting tools available to oil spill responders for shoreline and single vessel boom deployment. Maintaining an effective oil containment boom configuration with two vessels is difficult to coordinate. The Elastec BoomVane solves that problem


Repeat Order for Damen from Ivory Coast

Client with Damen Sales Manager at the shipyard Photo Damen

Following the contract signing between Damen Shipyards Group and Société de Transport Lagunaire (STL) for 16 shallow-draught ferries for the Ivory Coast city of Abidjan, the two companies have announced a supplementary contract for eight Damen Pontoons 2404


Yaroslavsky Rolls Out Lead Seagoing Tug

Pic: Yaroslavsky shipbuilding plant

 Yaroslavsky Shipbuilding Plant says it has launched the seagoing tug of project 23470.    The vessel named Sergei Bulk is the lead tug in the series of five vessels ordered to the shipyard by RF Defence Ministry. The vessel designed by Baltsudoproekt bureau was launched on


Cortland Australia Bags Singapore Contract

Photo: Cortland Australia

Engineered rope specialist Cortland Australia said it has secured a contract to supply Singapore’s ASL Shipyards with high performance Plasma 12x12 towlines for BHP Billiton Towage Services’s new fleet of six RAstar85 ASD escort tugs.  


First TTS Shipset Delivered to COSCO Shanghai Shipyard

Photo: TTS Group

 TTS Group announced the delivery of the first of four shipset of TTS deck equipment to COSCO Shanghai Shipyard.   In April 2015, Shanghai Shipyard Co. Ltd., part of the China State Shipbuilding Corporation (CSSC), ordered various TTS deck equipment for four 28


Heerema Sleipnir Contract to TMC

Heerema Sleipnir (Photo: Heerema Marine Contractors)

Compressor supplier Tamrotor Marine Compressors (TMC) has been awarded a contract by Sembcorp Marine to supply compressed air systems to the new build Heerema Sleipnir crane vessel.      The scope of work includes manufacturing and delivery of a complete marine compressed air






 
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