井控安全阀及远控房

AssociatedWellControlEquipment辅助井控设备刘建斌(1)SafetyValves安全阀SafetyValves当发生溢流时，组织地层流体进入钻柱内FullopenDPSafetyValve全开式钻杆安全阀Alwaysstandbyondrillfloorinopenposition时刻在钻台开位待命ItshouldbeinstalledontopofthestringwhenKellyisnotinuse.方钻杆及顶驱没用时，装在钻柱顶部(4½”IFBOX*PINconnection)Advantage:Minimisingtheeffectofupwardmovingflowbecauseitisstabbedandmadeupinopenposition.优点:降低了流体向上的冲击力，因为在安装时通孔时畅通的.InsideBOP内防喷器sealInsideBOPAlwaysstandbyondrillfloorinopenposition时刻开位待命CannotshowSIDPPunlessbepumpedopen读不到立压，除非开泵顶通Nologgingoperationscanbedone安装后不能下入电测工具InstalledontopofFOSV安装在全开式安全阀上面Cancirculatedown不能反循环Floatvalve浮阀Flapper-typespring-loaded安装：Advantage:•Preventsformationfluidsfromenteringthestringanditstopssuctionofcuttings.阻止地层流体进入钻柱，阻止堵水眼Disadvantage:•Thedrillpipemustbefilledwhenrunin.•Readingofshutindrillpipepressure(SIDPP)ismorecomplicated.•ReverseCirculationisnotpossible.•GreaterstrainontheformationwhenRIH.•Increasestheoveralltrippingtime.KellycocksSafetyvalvesinTDS压力级别选择：大于最大预期地面压力不超过BOP额定工作压力必须进行试压：试压方向压力ThanksBOPCONTROLSYSTEMToprovidepressurizedstoredhydraulicfluidsothatBOPstackfunctioncanbeoperatedpromptlywithinAPIspecifiedtimeandBOPcanbeclosedevenifthereisnopoweravailable.Chapter2BOPCONTROLUNITChapter2BOPCONTROLUNITAccumulatorbottlesChargingNitrogenonlyPre-chargepressure:1000±100psiRatedpressure:3000psiCapacity:10GalStorepressurizedhydraulicfluidReservoirtankCapacity:atleasttwotimestheusablevolumeVolumeupperlimit(notpressurized):oneinchbelowtheinspectionportVolumelowerlimit(fullypressurized):oneinchabovethesuctionvalvesofthepumpElectricpumpElectricstarter(keepinautomode)Auto-Matichydro-electricpressureswitch(2700-3000psi)AirpumpAutomatichydro-pneumaticpressureswitch(2500-2900psi)PressureregulatorManifoldpressureregulatorReducingtheaccumulatorpressuretomanifoldpressure1500psi.pressurePressureregulatorAnnularpressureregulator•Twotypes(AiroperatedandManualoperatedwithairmotor)AiroperatedShouldhaveaunit/remoteselectorPressureregulatorManualoperatedwithairmotorPressureReliefValveAccumulatorreliefvalve:3500psiManifoldreliefvalve:5500psiPneumaticPressureTransmittersAccumulator/Manifold/AnnularpressuretransmitterConvertinghydraulicpressureintoairpressureInputairpressure(3-15psi,18psi)pressurePressuresAccumulator:3000psiManifold:1500psiAnnular:1500psiAirsupply:125psiPre-charging:1000±100psi3-position/4-wayvalve3positionsblock-/ventpositionopenpositioncloseposition4connectionspressureReturntotankOutlettoopeningchamberOutlettoclosingchamber1-Regulatorpressure2-To/Fromclosechamber3-To/Fromopenchamber4-ToreservoirtankBypassvalveAccumulatorcapacitycalculationsUsablefluidvolumeisdefinedasthevolumeoffluidrecoverablefromanaccumulatorbetweentheaccumulatoroperatingpressureand200psiabovethepre-chargepressure.Accumulatoroperatingpressureisthepressuretowhichaccumulatorsarechargedwithhydraulicfluid,3000Psi.Pre-chargepressureisdefinedasthepressureofnitrogenintheaccumulator,1000Psi.Minimumaccumulatoroperatingpressureis200Psiabovethepre-chargepressure,1200Psi.AccumulatorcapacitycalculationsACCUMULATORCALCULATIONP1xV1=P2xV2=P3xV3VOLUMEOFTHEACCUMULATOR.PRECHARGEPRESSURE1000PSI??OPERATINGPRESSURE3000PSIMINIMUMOPERATINGPRESSURE1200PSITHEGASLAW.P1=1000PSIV1=KnownP2=3000PsiV2?P3=1200PsiV3?FluidFluidGASLAW(Boyle`sLaw):P1*V1=P2*V2=P3*V3=CONSTANT------(Tkeepconstant)AccumulatorcapacitycalculationsPrinciplesofaccumulatorcalculations(Boyle`slaw)V1:Actualcapacityofaccumulator=10gallonsV2=(P1V1)/P2=1000*10/3000=3.33galV3=(P1V1)/P3=1000*10/1200=8.33galUsablefluidvolume=V3–V2=5galAccumulatorcapacitycalculationsSizingofaccumulatorTheusablefluidcapacityofaccumulatorbottlesshouldbeequaltothevolumerequiredtoclosealltheBOPsandtoopenallHCRvalvesinBOPstackwithanadditionalsafetyfactorof50%whichisrequiredtocompensateforanyfluidlossincontrolsystemand/orpreventers.Accumulatorbottlesalsoshouldmaintainaminimumoperatingpressureof1200psior200psiabovethepre-chargepressure,whicheverpressureismaximum,whenalltheBOPstacksareoperatedwithpumpsoff(bothpneumaticandelectric)AccumulatorcapacitycalculationsExample:A135/8“BOPstack:5000psiAnnularpreventer–17.98gallonsoilneedtoclose,Three3000psiRams–5.8gallonsoilneedtocloseforeach,OneHCRinchoketoopen–1.1gallonsoilneed.A3000psiworkingpressureBOPcontrolunitisused.Calculatehowmanybladdertypeaccumulatorbottlesof10galcapacityarerequiredintheunit.DrawdowntestShutoffallthepumps,closeallthepreventersandopenallHCRs,tochecktheaccumulatorpressurevaluewhichshouldnotbelessthan1200psi(or200psimorethanchargingpressure)ToensureallthepreventerscancloseandHCRopenoncewithpoweroffRemoteControlPanel•Twotypesofpanel(AirorElectricoperated)•Clearlyshowingopenandclosedposition.•Includingamastershutoffvalve.RemoteControlPanelChapter2BOPCONTROLUNITElectricalBOPControlpanelRemotecontrolpanel(airoperatedmastervalve)Thanks