Embed Size (px)
Citation preview
Application
+ Jacket Foundations Installation
SubSeA Pile TemPlATe (SPT) Fixing the position of the pin piles on the seabed for driving
The Subsea Pile Template tool shall be used to fix the relative positions and verticality of the piles on the seabed to ensure that the jacket legs will fit into the pre-installed piles. It is also capable of providing a corrective moment to the pile to resolve any misalignment.The template will be deployed to the seabed and shall be used to guide and secure the pile during hammering and/or drilling operations.
• Designedfor2.5mdiameter,butcanbeusedforsmallerpilesthroughminoradjustment
• CanallowforrangeofhammersizesandastheJawscanopenfullyandafollowerisnotnecessary
• Mudmatdesigncanbeamendedtomeetwithprojectspecifics,tobeagreedduringdetaileddesignanddependingonJettingOptions
• Designkeepsvesselintegrationrequirementstoaminimum
• Asthejawscanretractthiskeepsdeckspacetoaminimum
• Thesystemhasaclampingmechanismmeaningthatitcansupport3or4pilesontheseabedatonetimeandstillmaintainonbottomstability
• Thejawshavedeeppadsincontactwiththepinpilereducingtheloadsonthepiletowithinthepile’scapacity
benefiTS
2 /
OPerATiOnAl feATureS
• Quicktodeployandrecover
• Canaccommodate5°soillevelchanges
• Canbedeployed/recoveredutilisingasingleordualpointlift
• Opendesignmeanspassingthroughwaterwillallowforeaseofflow
• Themudmatcanbesetat5°angleduringloweringthroughthesplashzonemeaninglessforcesduringthetransition
• Mudmatwillbedesignedtoalloweasyreleasefromseabed,dependinguponsoilconditionsajettingsystemcanbeaddedtoeasetherelease
• Fullyopeningjawsallowsforfullretractionavoidingriskofpilejamminginthestructure
• Fullyopeningjawsallowpilestobehammeredtoverylowstick-upheightsifrequired,asthehammercanpassthroughtheopenjaw
• Doesnotrequireafollower
• Useofalljawsallowsrelativepilepositiontobemaintained
• Canholdpileduringchangesfromvibrotohydraulichammers
• Integratedinclinometersandcamerascanbefittedtoallowtomaintainandmonitorverticalityofpile
• HasanROVinterfacepanelforinterventionifrequired
HeAlTH & SAfeTy
Throughoutthedevelopment,wehaveconsideredtheabilitytoincreasesafetybyreducingmanualintervention
relevAnT COdeS, STAndArdS & legiSlATiOn
GoodswillconformtoallrelevantdesigncodeswithinDNVOffshoreStandards.
/ 3
equiPmenT OPerATiOnAl durATiOnS
Themainactuationelementsoftheequipmentareasfollows:
CylinderFunction Time
JawOpening 4mins
JawClosing 6mins
JawLock/Unlock 1min
Pilelevellingcylinder(each) 5mins
Templatelevelingprocess 10mins
Thebelowtolerancesanddetailsaretypicalofcurrentdesignsonly.Thesecanbeextendedoradjustedtomeetproject-specificrequirements.
Pin Pile dimenSiOnS
Requirement
Outsidepilediameter 2.5m
Pilelength Upto65m
Pileweight Upto250t
Finalheightofpiletopaboveseabed Nolimits
Pile inSTAllATiOn TOlerAnCeS
Themaintolerancestobeadheredtoarepresentedbelow:
Requirement
Piletopelevationrelativetothenominalpilepositioninanydirectionmeasuredatthetopofthepile
+/-50mm
Distancebetweenanypileandthetwoadjacentpilesfromthetheoreticaldesigndistancemeasuredatthetopofthepile
+/-50mm
VerticalityofpilesrelativetotrueverticalAccuracyof+/-0.25°ispossiblebutrequiresextrajawheight
+/-0.5°
Elevationattopofpilerelativetodesignlevel
+/-100mm
Maximumdifferencebetweenthehighestandlowestpile
+/-100mm
TemPlATe POSiTiOning TOlerAnCeS
Themaintolerancestobeadheredtoarepresentedbelow:
Requirement
Templatehorizontallocationrelativetotargetposition
+/-2minanydirection
Templatebearing(heading)
+/-5°
OPerATiOnAl limiTS
Requirement
PilingOperationsseastate(Hs) 2m
Templatepositioningandlevelling 2m
Launch&Recoveryoftemplateseastate(Hs)Dependentonwaveperiod
2m
Launch&RecoveryoftemplateCurrent(Cs)
1.5m/s
Insertingandstabbingpilesseastate(Hs)Dependentonwaveperiod
2m
Windspeed(U10) 12m/s
4 /
TeCHniCAl deTAilS
/ 5
SySTem COmPOnenTS
• JettingSystem
• OutfittingwithSurveyEquipmentandMonitoring
• CameraMonitoringSystem
• FrondMatDeploymentSystem
• Deck-mountedorSubseaHPU
• ModularLegSystem
Houlderhasaversionofthedesignconfiguredwithacentralstructureand3or4removablelegsections.Thisfeatureprovidedthefollowingadditionalbenefits:
• Forfutureprojectswith4legstructures,thelegsectionscanbere-usedwithmodificationstothecentralstructureandmudmattosuit.
• Forfutureprojects,ifdifferentpositionsareneeded(i.e.>27m)spacersectionscouldbeintroducedtoextendthereach.Thiswouldbesubjecttooverallsizeandstructurallimitsofthemainbody.
• Eachlegwillbeself-containedwithallthecylindersandmeasurementsystemsmounted.Thismeansthatifrequired,onefulllegcouldbecomeaspare.
vAriATiOnS
6 /
/ 7
Houlder lImIted22 Witney WayBoldon Business ParkTyne & WearNE35 9PEUKT: +44 (0)191 536 2777
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.
