OneSubsea Swivel and Marine Systems
Swivel Stack SySteMS
the swivel stack is the heart of the turret mooring and fluid transfer system (FtS). Reliability, safety and flexibility are key to securing increased uptime for the floating production, storage and offloading (FPSO) / floating storage and offloading (FSO). the swivels ensure that all fluids (liquids and gas), controls and power are transferred safely from the geostationary parts (i.e., wells, flowlines, manifolds and risers) to the rotating vessel and its process plant under any environmental conditions in the field.
OneSubsea is able to engineer, produce and deliver swivel stacks and fluid transfer systems to FPSOs and FSOs worldwide. we provide a safe and reliable production flow year after year. in addition, the OneSubsea FRieND Remote Surveillance and Diagnostic System is offered for the systems.
with the support of its parent companies, OneSubsea provides the oil industry with products that are engineered, manufactured, tested, installed and commissioned as turnkey systems and modules.
tOtal SySteM SuPPlieR
Topside and subsea
Multiphasepumps
Multiphaseflowmeters
Multiportselectormanifolds
Wetgascompressors
Fpso/Fso
Swivelstacksandfluidtransfersystems
Offshorecryogenictransfer(OCT)
Subsealoadingsystem
Maincontractorroleavailableasrequiredbytheproject
OneSubseahastheskillsandexpertise
toprovideengineeringanddeliveryof
completeswivelandmarinesystems.Our
rangeofproductsallowsourcustomers
toimplementcompletefluidtransfer
systemstopsideandsubsea.Allofthese
systemsrelatetofluidandgastransport,
inadditiontocontrolandmonitoringof
theperformance.OneSubseacanprovide
compactandhighlyintegratedsolutions.
swivel sTacks and Fluid
TransFer sysTems For
Fpso/Fso
OneSubseaoffersreliableand
versatileswivelsforthetransfer
ofoilandgasproduction,
chemicals,water,electricpower,
hydraulicsandsignals.Ourfluid
transfersystemcombinesswivel
stackswithcompactmanifolds,
valves,quickdisconnectable
connectors,piglaunchers/
receivers,etc.,inadditionto
varioussystemsassociatedwith
powersupplytosubseapumps.
oFFshore cryogenic
TransFer
OurOCTcapabilitiesprovide
safeandreliabletransferofLNG
fromshiptoshiporfromshipto
offshoreterminals.OneSubsea
providesanOCTsystemthatisa
completeofftakesystemforLNG.
Itconsistsofaflexiblepipeand
usesavacuumtoinsulateagainst
theenvironment.
submerged loading
TheOneSubseasubmergedloadingsystem
hasseveraluniquefeaturesandbenefits:
Robustcapabilitieswithincreasedweatherandoperationalenvelope
Utilizesprovencomponentsthroughoutthesystem
Nomodificationisrequiredfor theexistingdynamicpositioningtankerfleet
Loadinghoseisnotincontact withtheseabed,thusnowearof hoseoccurs
Vesselcollisionsarenotanissue duetosubmersiblelocation
Systemispiggable
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iNtegRateD aND cOMPact FluiD tRaNSFeR SySteM FOR Oil aND gaS PRODuctiON
a ToTal sysTem can consisT
oF The Following:
Riserhangoff
Inletsection
Swivelstack
Emergencyshutdown(ESD)valves
Flexibleconnections
Pigreceiversandlaunchers
Compactcontrolandmonitoringsystemintegrationtohydraulicpowerunit(HPU)
HPU
Integratedmultiphaseflowmeters
Multiportselectormanifold
Structuralconnectionsandtorquearms
Quickconnectanddisconnect
Inletandoutletpigging
Isolationvalves
Procurement of a complete fluid transfer system will limit the number of interfaces and can secure focus on fluid transfer.
Complete stack-up prior to shipment
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what MakeS ONeSubSea Swivel StackS uNique
Verycompactandlightweight,requiringreducedspaceandstructuralsupport
FitsanyturretandFPSO
Extremelyhighpressurecapability:to7542psi(520bar)
Verylargethroughputcapacity
Highsafetyandreliability,withcontinuousconditionmonitoringoftheswivelstacksystem
Greenlightphilosophy,confirmingsystemavailabilitybeforestartup
Completelyindependentofprocessfluidandoperatingpressures
Optimumsealoperatingconditionsindependentofpressureandtemperature
Remotelyoverpressuredbarrierfluid-activatedsealswithcleanhydraulicfluid
Modularizedandstandardizeddesignwithflexibilityfortheoperator
Standardizedsealingandbearingsystemforhighavailabilityofspares
Doublesealingbetweenindividualswivelsandfourdynamicsealsfromtheprocesstowardtheenvironment
Onlyhigh-qualityduplexmaterialsareutilizedintheswivels
Lowtorquewithcontinuouslubricationofsealsandbearings
Nointernalpipingorflanges,butusechannelsinsolidcore
InstalledinasingleliftontoanFPSO
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hOw ONeSubSea SwivelS wORk
the OneSubsea swivel stack assembly consists of several subassemblies stacked on top of each other. the various combinations of standardized subassemblies provides the flexibility to fit your vessel.
inleT/ouTleT
secTion
Fiber-opTic roTary joinT
hydraulic uTiliTy swivel
elecTrical signal slip ring
Torque arms
gas liFT and injecTion
swivel secTion
Fire-waTer swivel
waTer injecTion
swivel secTion
producTion
swivel secTion
ShiP
bO
aR
D StR
uc
tuR
e
hydraulic uTiliTy swivel
4
paThs
Forelectric,signalandhydrauliclines,whichare
distributedaroundtheflowpaths.
inner core
Geostationarywiththerisers,turretandturret-
mountedpiping;consistsofmultipleflowpaths.
Flow paThs
Fortransferanddistributionoftheflowintothering
volume.
ring volume
Madeupbythespacebetweentheintermediatering
andtheoutletring.
inTermediaTe ring
Fixedtotheinnercore.
ouTleT ring
Connectedtotheshipboardprocesspiping;torque
armsareconnectedtotheoutletrings.
radial and axial bearings
Controltherelativemovementbetweenthe
intermediateringandtheoutletring.
dynamic seals
Barrierfluidenergizedandmovetowardeachflow
pathandtheenvironment,preventingtheflowfrom
leakingoutoftheringvolumetootherpathsorthe
environment.Therearefourdynamicsealsfromany
pathtowardtheenvironment.
The basic scope oF The onesubsea
swivel sTack sysTem includes:
Swivelstackassembly
Swiveltorquearms
SwivelbarrierfluidHPU
Swivelcontrolcabinet
The outlet rings and parts of the bearing follow the rotation of the vessel.
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Flexibility aND veRSatility
Eachswiveldesignisindependentoftheflowingmedium
Duplexmaterialallowsforalmostallflowingmedia
AllswivelscanhandleHPHTapplications
Sealingsystemsarenotincontactwithaflowingmediumorsand
Modularizedswivelisdesignedtosuitdifferentpressuresandcapacities
Modulescanbeequippedwithsingleormultiplerings
Eachringcanbefittedwithoneormultipleoutlets
Swivelscanbeaddedtoexistingstacks
the OneSubsea swivel stack and fluid transfer systems provide flexibility and versatility for customers.
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Onlineswivelconditionmonitoringisanimportant
safetyandreliabilityissue.Monitoringpressures,oil
consumptionandtorqueforcesgivestheoperator
indicationsofpossiblefailuremodes.Trending
parameterscanassisttheoperatorinplanned
maintenance,resultinginhigheruptime.All
parameterscanbereadandcontrolledfromthe
FPSOsmaincontrolcenter.
reliabiliTy issues are dependenT upon The
Following elemenTs:
Provendesign
Qualityofpersonnel
Manufacturingcapabilities
Systemapproach
Completesystemtesting
Inaddition,thesafetyofpersonnelandtheenvironment
isfundamentaltoalloperators.Selectingthehighest
qualitymaterialswithprolongedservicelifeisapriority
forOneSubsea.
quality is maintained throughout OneSubseas system engineering and deliveries by performing all critical work within one company, from design to delivery. Our products are thoroughly tested before they are released, providing the required quality. all work is performed in accordance with our iSO 9001-certified quality assurance system.
SaFety aND Reliability
OneSubseas swivel stacks utilize proven technology, innovative design and engineering, and communication with customers. Our unique, standardized and compact swivel design is relevant for several applications and meets industry function requirements.
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aNy aPPlicatiON, aNy tuRRet aND aNy FPSO FOR aNy FielD
Floatingproductionvesselsareflexibleandversatile,makingthem
appropriateforuseonavarietyoffieldtypes.Thesefeaturesalso
applytotheselectionandarrangementoffluidtransferandswivel
stacksystemsforFPSOs.FPSOownersandenduserscanutilize
OneSubseasexpertisefortheirswivelandmarinesystemstoincrease
thevalueofthevesselinmultiplefields.Sincetherewillbean
increasingnumberofvesselsavailableinthemarketplaceoncethe
FPSOsmovefromtheircurrentfields,thevesselsmustbeflexiblein
ordertostaycompetitive.
Itisexpectedthatvesselswillneedtobeabletoeasilyrelocateor
beeasilyconvertedtosuitalternativeproduction,waterinjection,
gasinjectionandotherrequirements.Throughutilizationand
combinationofstandardswivelsections,OneSubseaisabletoprovide
swivelandmarinesystemswiththefeatures,capacitiesandflexibility
requiredforsuchFPSOs.
swivel inTegraTion
FPSO
FPSO
FPSO
Shuttle taNkeR
ExternalTurret
KeelIntegratedTurret(KIT)
InternalTurret
Subsea
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SubMeRgeD lOaDiNg SySteM
TheOneSubseasubmergedloadingsystemconsistsofa
subseaframe,rigidriser,buoyancytankwithswivelsand
loadinghose,andpickupsystemfortheloadinghose.The
subseaframecontainscouplersfortwoflexibleflowlines,
valvesandacontrolsystemtocommunicatewiththe
platform.Theriserhasaflexiblejointatthelowerend
andisheldintensionbythebuoyancytank.
Aswivelsystemisplacedontopofthebuoyancy
tankthatallowstheloadinghoseandshuttletanker
toweathervanefreely.Thebuoyancytanktypicallyis
located246ft(75m)belowtheseasurface.Thepickup
systemisattachedtotheendoftheloadinghoseand
connectedtoabuoyonthesurfacethatcanbepickedup
bythetankerforconnectionoftheloadinghose.
our submerged loading sysTem has The
Following advanTages when compared wiTh
convenTional loading sysTems:
Simpleandbuiltonstandardandprovencomponents
Requiresnomodificationsonexistingtankerfleet
Loadinghosewillneverbeincontactwiththeseabed
Robust,withalargerweatherwindowandawideroperationalenvelope
Locatedsubsea,itissubjectedtolowenvironmentalloadsandmotions
Possibilityoftankercollisioniseliminated
Designedfor25yearsofservicelifeandrequiresalowdegreeofmaintenance
Fullypiggablesystem
Allowsfordiverlessreplacementofallcriticalcomponents
Maybelocatedinclosevicinitytoexistingloadingsystem,thusallowingboththeexistingandnewsystemstooperateinparallel;theoilexportisthereforenotinterruptedduringfieldtestingandcommissioning
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Data MaNageMeNt aND cONDitiON MONitORiNg
onesubsea Friend remoTe surveillance
and diagnosTic sysTem
TheOneSubseaFRIENDRemoteSurveillanceandDiagnostic
Systemprovidesreal-timedatareadings,datamanagementand
conditionmonitoringofOneSubseasuppliedsystems.Adedicated
webportalprovidesthecustomerwithaccesstotheseservices
andrepresentsthefrontendtothereal-timedatabasecontaining
interactivefunctionalitysuchassophisticatedtrending,data
exportandtoolstoenhanceandsecuresystemperformance.One
exampleoftheinteractivetoolsistheSwivelFlowCalculatorfor
productionswivels.Thisinteractiveapplicationmakesitpossible
fortheoperatortoincreaseproductionwithinthepermissible
designlimits.
TheFRIENDsystemsautomatedalertfeaturecontinuously
monitorssystemperformanceandprovidesalertsand/or
alarmstoOneSubseapersonnelondutywhenincomingdata
totheFRIENDdatabaseindicatesabnormalprocessorsystem
conditions.ThisinformationenablesOneSubseatoprovidea
proactiveservicetosecurebestpracticesinequipmentoperation
andmaintenance.
ManycustomerssubscribetotheFRIENDsystemandfullyutilize
thecommunicationfunctionalityofferedbythesystem,i.e.,a24/7
helpdesk,aninquiryanddiscussionforum,FAQsandadocument
library.Statusreportsarequalityassuredbyswivelexpertsandare
publishedonadaily,weeklyand/ormonthlybasis.
condiTion moniToring parameTers
Torquereadingsfromalltorquesensors
Primaryandsecondarybarriersystempressures
Barriertanklevel
Numberofbarrierpumpstartsforbothprimaryandsecondarypumps
FTSvalvemovement
Processparameters(productionandgasliftpressure,temperature,flowratesandsandproduction)
Shipmotionandmovementinformation,includingheading
main cusTomer beneFiTs
Customerandapplication-adaptedsupport
Proactivefailureavoidanceandremoteexpertanalysisaswellasonlineadvice
Improvedoperationofequipment,extendedrunlifeandincreasedmeantimebetweenfailures
Reducedoperatingcostsandincreasedoilproduction
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MaNuFactuRiNg aND teStiNg FacilitieS
OneSubseahasauniquesetupwithmodernmanufacturing,
assemblyandtestingfacilitiesforsystemandintegrationtesting
priortoshipment,bothdryandwet.Beforebeingdelivered,
eachswivelstackpassesthroughatestprogramwhereall
subassembliesandsubsystemsaretestedpriortofullintegration
testinginthetestdockinacontrolledenvironment.
Thecompleteswivelstack,withallauxiliarysystems,istested
atmaximumpressures.Rotationtestsareconductedaspartof
astandardswiveltestprocedure,andthecompleteintegrityof
thestackisdemonstratedandverified.Inaddition,heavyin-
houseliftcapabilityenablesfullyassembledandtestedsystems
tobeliftedontovesselsatthekeyside.
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MaiNteNaNce, iN-Situ Seal RePlaceMeNt
OneSubseaswivelsaremanufacturedwithdouble
dynamicseals.Thedoublesealingarrangementensures
thatoneseal(secondaryseal)isrunningidlewhileone
seal(primaryseal)isperformingtheactivesealingaction.
Iftheactivesealfails,thesecondarysealwilltakeover
thesealingfunction.Thisgivestheoperatortimetoplan
foraswivelsealchangeoutduringthenextscheduled
productionshutdown.
Keyswivelparametersarecontinuouslymonitoredand
trendedinadedicatedswivelcontrolsystem.Afault
developmentcanbeobservedandcorrectiveactions
plannedfor.
Theswivelstackcanbedisassembledin situ.This
requiresaspecialtoolpackagethatcanbeprovided
tothecustomer.Thissequenceisindependentofwhere
oftheswivelstackislocated.
Theswivelstackisamodularizedunitthatcanbe
disassembledbyliftingoffeachsectionatatime.A
specialtoolpackageisusedfordismantlingthefailed
swivelsection.Afterrepairingorchangingtheseals,
theswivelsectionisassembledandotherswivelsections
arereinstalled.
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ReSeaRch aND DevelOPMeNt
OneSubsea is dedicated to quality and reliability of its products and services. continuous R&D is an important part of the OneSubsea philosophy. before releasing any new technical solution or product, we ensure that it meets our high quality standards. extensive and realistic testing is integrated into our R&D programs to continuously improve our products and services.
OneSubseasadvancedsubsea
technologies,suchasourmultiphase
metering,multiphaseboosting,
subseaprocessingsystemsandpower
distributionsystemsofferfurther
flexibilitytoourcustomersfield
developmentsandFPSOinvestments.
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4646 w. Sam houston Pkwy. N.
houston, tx 77041
uSa
tel 1 713 939 2211
5 Mondial way
harlington
hayes, ub3 5aR
england, uk
tel 44 208 990 1800
Sandslikroken 140
PO box 174
Sandsli, N-5862
bergen, Norway
tel 47 55 92 88 00
level 11, 12-14
the esplanade
Perth, western australia
6000
tel 61 8 6389 5000
www.onesubsea.com
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