空气锤钻井英文课件(Air Hammer Drilling)

AirHammerDrilling,OptimumConditionsforUse,Hardrockareaswithassociatedlowdrillability.Areaswhereholedeviationisaconcern.Horizonswherethereisnowaterinfluxorthisinfluxisnegligible.,AirHammerAdvantages,Verylowrequiredbitweights.Highcompressiveforceatthebit.Minimaldeviationtendencies.Excellentbitlife-Bitsoftenreusableonsubsequentwells.Excellenton-bottomtime-Fewertripsimprovesaveragepenetrationrate.,AirHammerAdvantage,AirHammerTechnology,Drillstringrotationindexesthebitinsertstoafreshrocksurfaceduringeachbeatoftheairhammer.Therocksnaturaltendencytopropagatefracturesisusedtomaximizecuttingssize.Rpminthe20to30rangeusuallyprovidesmaximumairhammerpenetrationrates.,TheIngersoll-RandQLSeries,Maximizesefficiencyanddevelopsgreaterpowerthananyotherhammer.Theirusewillresultin15%to30%higherrateofpenetrationovercompetitorshammers.Thisresultsinasignificantcostsavingstotheoperator.,QLAirHammerSpecifications,QL-80:7inchOD,maximumbit10inchesQL-120:11inchOD,maximumbit171/2inches,IntroductiontoAirHammerTechnology,TheIngersoll-RandQLSeriesAirHammerpowercycleisillustratedonthefollowingslides:,Ingersoll-RandQLAirHammer,MajorParts,CheckValveValvePressureClosePortDriveVolumeBlowPortPistonReturnundercutReturnChamber,DistributorGuidePistonExhaustTubeBit,IRQLAirHammerPowerCycle,CirculatingBitOffBottom,AirismeteredthroughblowholesinCylinder.BlowPortsclosed.TailofPistonsealsCylinderfeedportpreventingdrillfromrunningwhileoffbottom.FrontofPistonsealsoffReturnChamberfromhighpressureair,alsopreventingrunningoffbottom.,IRQLAirHammerPowerCycle,CycleStart,Valveclosed.BlowPortsclosed.Cylinderfeedportisopen,allowinghighpressureairtoenterReturnChamber.,IRQLAirHammerPowerCycle,DriveChamberCloses.,PistonTailBoresealswithDistributorGuidetobegincompressingairinDriveChamber.,IRQLAirHammerPowerCycle,FrontPortingCloses.,AirinDriveChambercontinuestocompress.ReturnVolumeportingclosesandairinReturnChamberexpandspushingPistonupward.,IRQLAirHammerPowerCycle,ReturnChamberExhausts,AirinDriveChambercontinuestocompress.InertiaofPistoncontinuesupwardtravelandDriveVolumecompression.PistonclearsExhaustTubeonbitventingremainingairinReturnChamber.,IRQLAirHammerPowerCycle,ValveOpens,PressureinDriveChamberforcesValveopen.DriveChamberpressureincreasesashighpressureairrushesin.ThePistonslowstoastopandreversesdirection.,IRQLAirHammerPowerCycle,PistonReversesDirection,Pistonstartsdownwardtravel.ValveisstillopenandhighpressureairisfillingDriveVolumeacceleratingPistontowardsbit.,IRQLAirHammerPowerCycle,PressureAssistedValveClosure.,PressureClosePortopens,andasignalistransmittedtoassistvalveclosetiming.,PistonsealsonExhaustTubeandReturnChambercompressionbegins.,IRQLAirHammerPowerCycle,DriveChamberExpansion,ValveshutsandDriveChamberairexpands.,PressureinReturnChambercontinuestobuild.,IRQLAirHammerPowerCycle,Drivechambercontinuestoexpand,drivingpistondownward.,Returntimingopens,highpressureairfloodsreturnchamber.,ReturnChamberPortsOpen,IRQLAirHammerPowerCycle,PistonClearsDistributorGuide,PressureVentstoExhaust.,DriveChamberExhausts,IRQLAirHammerPowerCycle,PistonImpactsBitCycleRepeats,PistonImpact,IRQLAirHammerPowerCycle,TheHydrocyclone,TheHydrocycloneAdvantage,Ingersoll-RandHammerBits,BitShankis30%largerthancompetitors.Moresplinesandplasticinsertsreducesfrictionandprolongsbitlife.,WesupplyIRAirHammerBitsfrom215.9mmto444.5mm.Diamondenhancedinsertscanbesubstitutedforstandardtungstencarbidetosuityourspecificdrillingconditions.,12.25PCD1Row,Ingersoll-RandHammerBit,TWOSURFACEHOLEINTERVALSTotalmetersdrilled-1051m.TotalHrs.onBottom-69TotalHrs.Circ.-18.5WOB-.5to2.5daNRPM-20-32AirVol.-