Application

+ Construction of Offshore Wind Farms (OWFs) – Installation of Jacket Foundations

ExtErnAl JAckEt lifting tool (EJ-lt) Lifting jacket foundations with external lugs

The tool, which can be operated remotely, engages with the external lugs on offshore jacket foundations. It negates the need for human intervention, thus increasing safety and speed of jacket installation.

• Thetooldesignandoperationshouldnotrequiremodificationtothejacketdesign

• Capableofliftinga2000tJackets

• Thedesignalsoaimstominimisetheheightandweightofthetooltomaximiseoperationalflexibilitywithregardstohookheight

• TheHoulderdesignconceptforthisequipmentallowsfortheremoteengagementanddisengagementofthetool,thusremovingtherequirementforpersonnelworkingatheighttoinstallthetoolpriortolifting

• Noumbilicalrequired

bEnEfits rElEvAnt codEs, stAndArds & lEgislAtion

2 /

Thetoolwillcomplywiththefollowingcodes&standards:

• DNVGL-SE-0080ed.2015-12,NobleDentonmarineservices–marinewarrantysurvey

• DNVGL-CG-0127ed.2015-10,FiniteElementAnalysis

• 0001/NDrev.12015,GeneralGuidelinesforMarineProjects

• 0027/NDrev.62015,GuidelinesforMarineLiftingandLoweringOperations

• 0030/NDrev.62015,GuidelinesforMarineTransportations

systEm spEcificAtion

• Toolengages/interfaceswiththeexternallugsonajacket

• Capableofliftingjacketswithamaximumweightof2000t(takingintoaccounttheappropriateliftingfactors)

• Weightoftoolisapproximately40t,notincludingrigging.Thetotalweightoftheentireliftingassemblyisestimatedat50t

• Isdesignedtoensurethatthejacketisnotoverstressedforanytemporaryloadcasesthroughoutitsoperation(i.e.engagement,liftingetc.)–thisistobeconfirmedviaFEAmodellingoftheliftingprocess

• Designedsuchthatitcanberemotelyoperated(wirelesselectroniccontrolsystem)forengagement/disengagementto/fromthejacket

• Willprovidetheremoteoperatorwithconfirmationthatthetoolisengagedandthattheliftingoperationissafetocommence

• Toolwilluse3mountedcamerastoenabletheoperatortopositiontheliftingtoolintojacketlugs

• Guidesandfinsenabletehsystemtofinditsfitonthelugsforengagementofthelockingpins,withoutneedingworkingatheight

• Automaticallyreleasesatseaafterinstallation

• Noumbilicalrequired

• Designedsuchthatitisinherentlysafeinasmuchthatitwouldnotlosetheloadshouldpowerbeterminatedfromthetoolorwhilstthereisanyloadbornbythetool

• Integratedpowersupplyandcontainsasecondarymeansofoperationshouldtheprimarycontrolsandorpowersystemfail

• Providessufficientprotectiononareasthatphysicallyinterfacewiththejacketsuchthatthetoolwillnotcauseanyformofdamagewhichmayaffecttheperformanceofthejacket

/ 3

/ 4

HOulder lImITed22 Witney WayBoldon Business ParkTyne & WearNE35 9PEUKT: +44 (0)191 536 2777

enquiries@houlderltd.comwww.houlderltd.com

contAct us

Houlder is an independent, innovative offshore engineering company. We build on 30 years’ offshore expertise and work closely with clients to design solutions for their technical challenges. We provide complete EPCI services with special equipment, consultancy, project management and engineering solutions for the offshore wind and wider energy sector.