Wellhead Design Slideshow

WellheadDesignLunch&Learn06-Feb-0711:30hrs–13:30hrsPresentedby:GerryBryant,[e-mail]•WellheadEquipmentforExplorationandDevelopment•ConventionalWellheadSystems,UnitizedWellheadSystems,andHorizontalWellheadSystems•EngineeringDesignRequirementsforSurfaceWellheadEquipment•BohaiPhase2DevelopmentWellheadDesign•SubseaWellheadEquipmentWellheadDesign,Lunch&Learn,06-Feb-07•TypicalLandBasedOilwellReprintedfrom:CaliforniaDepartmentofConservationWellheadDesign,Lunch&Learn,06-Feb-07•TypicalLandBasedDrillingRigReprintedfrom:CaliforniaDepartmentofConservationWellheadDesign,Lunch&Learn,06-Feb-07•TypicalOffshorePlatformReprintedfrom:CaliforniaDepartmentofConservationWellheadDesign,Lunch&Learn,06-Feb-07WellheadDesign,Lunch&Learn,06-Feb-07WellheadEquipmentforExplorationandDevelopmentWellheadDesign,Lunch&Learn,06-Feb-07•ConventionalWellheadsusedforExplorationandDevelopmentWells•UnitizedWellheadsusedforDevelopmentWells•MudlineEquipmentusedforDevelopmentWells,butgenerallyruninExplorationWellsascontingency•ProductionEquipmentusedforDevelopmentWellsWellheadDesign,Lunch&Learn,06-Feb-07•ExplorationwellsuseConventionalWellheadsalmostexclusivelybecausetheycanbestackedtoaccommodatemultiplecasingstrings•ConocoPhillipsusedaCameronconventionalwellheadfortheexplorationwellPL25-8-1inOctober2006•Drillingdepthisamajorcriteriaindeterminingcasingprogrambecausecasingisusedtostabilizetheup-holeformations,soconventionalwellheadscanaccommodatefromonetofivecasingstringsWellheadDesign,Lunch&Learn,06-Feb-07•ConventionalWellheadsrequirenippling-upandnippling-downtheBOPstacktoinstalleachsection,whichrequiresalotofrig-time;rig-timeisveryexpensive•Typicallylowtechnologydesignoptions•Afteruse,Convention–alWellheadspoolscanbeeasilyseparated,repaired,inspected,andre-usedWellheadDesign,Lunch&Learn,06-Feb-07•DevelopmentwellscanbecompletedwiththeconventionalwellheadsystemdiscussedearlierorusingtheUnitizedWellheadSystemshownhere•Designedinthe1950’s,themajorbenefitoftheUnitizedWellheadSystemisreducedrig-timeremovingtheBOPstackafterrunningeachcasingstring,thenhavingtore-installit.•ThisisaccomplishedastheUnitizedWellheadSystemsuspendsmultiplestringsofcasingwithintheonewellheadhousingUnitizedWellheadSystemsWellheadDesign,Lunch&Learn,06-Feb-07•CoPCBohaiPhase2UnitizedWellheadwillreceivethe9-5/8”casinghangerandthe4-1/2”tubinghangerWellheadDesign,Lunch&Learn,06-Feb-07•MudlineSystemsareusedinbothexplorationanddevelopmentwellsandaredesignedfortemporaryabandonmentandreconnectatalatertime•Usedifexplorationcampaignsareexpectedtoyieldgoodshowsofoilorifdevelopmentoftheoilfieldmaytakeseveralmoremonthsoryears•Withtheimproveddesignoftoday’sMudlineSystems,theyarealmostuniversallyusedduringexploratorydrillingWellheadDesign,Lunch&Learn,06-Feb-07•MudlineHangersaredesignedtonestoneinsidetheother•EachHangerexceptthelastincludesinternalprofiletosuspendthecasinghangerforthenextcasingstringWellheadDesign,Lunch&Learn,06-Feb-07•TemporaryAbandonment(TA)Capsareinstalledafterdrillingtoisolatetheannuliandholeboreformonthsoryearsuntiltheplatformisinstalledabove•Theupper-mostTACapisspacedoutduringdrillingtobeacouplemetresabovethemudline•Tie-backhangershavesealstore-establishintegritywitheachcasingstringbacktotheplatformWellheadDesign,Lunch&Learn,06-Feb-07seeMudlineEquipmentandTemplateSlideshowWellheadDesign,Lunch&Learn,06-Feb-07•Oncethedrillinghasreacheditstotaldepthandproductioncasingisinplace,theoperationsthatpreparethewellforproductionisreferredtoasCompletion.•Completionincludesdisplacementofdrillingmudwithcompletionfluid,perforatingthecasing,andinstallationoftheproductiontubing.•Finally,theSurfaceProductionEquipmentisinstalledwhichwillcontroltheflowofoilfromthewellduringproduction.•Thisflowcontrolequipmentisanassemblyofvalvesknownasthechristmastree.WellheadDesign,Lunch&Learn,06-Feb-07•Thechristmastreecanincludeactuatedvalves(airorhydraulic),manualvalves,andproductionchokesinordertothecontrolflowofoil.PneumaticActuatedMasterValveManualMasterValveProductionChokeCoPCBohaiWellheadandTreeAssemblyWellheadDesign,Lunch&Learn,06-Feb-07Therearenumerousdesignsandarrangementsfortheproductionequipment.WellheadDesign,Lunch&Learn,06-Feb-07EngineeringDesignRequirementsforSurfaceWellheadEquipmentWellheadDesign,Lunch&Learn,06-Feb-07AmericanPetroleumInstitute(API)•establishedin1919whenAmericanoilcompaniesworkedtogethertostandardizeoilfieldequipmentinordertoprovidemorereliablesupplytothecountry•maintainmorethan500standardsandrecommendedpracticescoveringallsegmentsoftheoilandgasindustrytopromoteuseofinterchangeableequipmentandsoundengineeringpractices•licensefacilitiesthatproduceproductsthatmeetAPIstandards,tomonogramthoseproductswiththeAPIlogo•APISpecification6Acoversthestandardizationofvalvesandwellheadequipmentandfirstappearedin1961.TheNineteenthEditionisthecurrentreferenceformanufactureanduseofsurfacewellheadequipment.•ScopeofAPI6Aincludescriteriaforperformance,design,materialselection,testing,inspection,welding,marking,handling,storage,ship