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EvolutionofOffshoreDrillingUnits,Instructor,22/6/2021,Objectives,AtthecompletionofthistrainingmoduletheengineerwillClearlybeabletodefinearigtypewiththeenvironmentitisbestsuitedtoListpro/consforthemanytypesofrigavailable,32/6/2021,WheredidOffshoreDrillingStart,In1897,38yearsafterCol.Drake’swell,H.L.WilliamsdrilledawelloffapierintheSantaBarbaraChannel.5yearslatertherewere150wells“offshore”California.By1921thereweresteelproductionpiersthatranmileoffshoreatRinconandElwoodCalifornia.In1932asteelpierisland60’x90’with25’airgapwasbuiltoffshoreCaliforniatosupportadrillingrig.In1938afieldwasdiscoveredoffshoreTexasandanotherwellwasdrilledto9,000ft.offawoodenplatin1941.,42/6/2021,Continued–WheredidOffshoreDrillingStart,WorldWarIIstoppedalloffshoreactivity.In1945Louisianahadastateleasesaleinthebaysandnearlandopenwaters.Thiswasfollowedbydrillingoffwoodenpierswithaconsiderableamountofcoringfrombarges.In1955CaliforniapassedtheCunningham-ShellActallowingoilandgasproductionoffshoreinstatewaters.Priortothiscoringwasallowedhowever,nodrillingcouldbedonethroughhydrocarbonations.,52/6/2021,Classesofoffshorerigs,2classesBottomSupportedFloatingBottomMooredDynamicallyPositioned,62/6/2021,BottomSupportedRigs,SubmersiblesBargedesignColumndesignJack-upsMatsupportedIndependentlegSlottypeCantilevertype,PlatsSteeljacketGravitystructureHybridstructureComplianttowerTensionlegplat,72/6/2021,FloatingRigs,BottomMooredDrillingtenderDrillingbargeDrillshipConventionallymooredTurretmooredSemi-submersibleSpar/Truss,DynamicallyPositionedDrillshipSemi-submersible,82/6/2021,SubmersibleBarge,6mwaterSitsonbottomUsedinstillwatersnotriversDerrickcanbelevelledDeckmaysitonpostsabovebargetoallowbargetobefullysubmersed,92/6/2021,SubmersibleIsland,FloatsinBallaststositonseabedInsideisfilledtogiveartificialgroundlevelDesignedforiceconditionsSuppliedbyice-breakershipsi.e.Sakhalin,CaspianSea,102/6/2021,SubmersibleColumndesign,25mwaterCantileveredderrickTriangularorsquaredeck,112/6/2021,“Richmond”SuctionPileConfigurationandLayout,122/6/2021,Jack-upMatsupported,3mminimumwaterdepthCarriesit’sownfoundationNeedsflatseabed,132/6/2021,Jack-upIndependentleg,Upto150mwaterdepthSlotorcantileverdesigns,142/6/2021,Jack-upSlot,WorksaroundajacketLimitedskidpatternReduceddeckspaceforequipmentDimensionofjacketcritical,152/6/2021,Jack-upCantilever,WorksoverjacketsRigfloorelevatestoclearthetopdeckofthejacketWatchinDrillingofficeasin-fillwellswillhavehigherRTE,162/6/2021,Plats,Upto1000mwater,butthatisunusualMadefrommanymaterialsorcombinationsWellsareveryclosetosavecostsFullfacilitiesarepermanentRighastobeabletoskidin2dimensionsMorethan1derrickispossibleRemovableifmodularized,172/6/2021,PlatSteeljacket,Upto400mwaterdepthJacketinstalledbybargeandheavyliftcraneTopsidesinstalledasintegrateddeckFixedderrickLowweatherdowntimecranes,182/6/2021,PlatSteeljacket,Upto400mwaterdepthJacketinstalledbybargeandheavyliftcraneTopsidesinstalledasintegrateddeckFixedderrickLowweatherdowntimecranes,192/6/2021,PlatGravitystructure,Upto400mwaterdepth1,000,000tonFloatedintoposition–ballasteddownCompletefromfloatoutOilstorage,202/6/2021,PlatHybridstructure,Upto400mwaterdepthJack-upontopofaconcretestoragebaseFloatedintoposition–ballasteddownCompletefromfloatoutOilstorage,212/6/2021,PlatComplianttower,Upto1000mwaterdepthSlenderAllowsadegreeoflateralmovementtoadsorbwaveloadingDrytrees,222/6/2021,PlatTensionlegplat,Upto3000mwaterdepthTendonsfixthistotheoceanfloorRigmoveslaterallyNOTverticallyWetorDrytreesarepossible,232/6/2021,Drillingtender,RigisonplatCouldbemodularDrillingservicesonbarge/semiLinkedwithbridgeCouldbeweatherdependentCaptainBSedco704,242/6/2021,Drillingbarge,VerycalmweatherMooredonlocationInlandwatersCouldactastender,252/6/2021,DrillshipConventionallymoored,AnchoredonlocationAnchorsrunforwardandaftHugevariableloadCancarrya‘well’sworth’,262/6/2021,DrillshipTurretmoored,ConventionalanchoringbutfromacentralturretAllowsvesseltofacecurrentweatherLocationkeepingbyanchortensioningPerhapsthrusterassist,272/6/2021,Semi-submersible,AnchormooredChainorwiremooring2-4000tondeckloadManygenerationsofdesignCurrenton6thgenerationVesselmoveswith6degreesoffreedom,282/6/2021,Spar/Truss,MooredonlocationSlenderbuoyantcolumnColumnsufficientlylongtominimiserollWillmovevertically;butsmallenoughmovementtousedrytreesCandrillfromthese,292/6/2021,DynamicallypositionedDrillship,KeepsstationusingtranspondersonseabedMovescontinuallytominimiseangleonriser/BOPShipsarenow300mlong,302/6/2021,DynamicallypositionedSemi,Upto3000mwaterdepthcapable–dependsontheamountofriseravailable8thrusters,360oazimuthing,312/6/2021,Drillinginincreasingwaterdepth,322/6/2021,Producinginincreasingwaterdepth,332/6/2021,Endofthismodule,
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