空气锤钻井英文课件(air hammer drilling)

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1、AirHammerDrillingOptimumConditionsforUseHardrockareaswithassociatedlowdrillability.Areaswhereholedeviationisaconcern.Horizonswherethereisnowaterinfluxorthisinfluxisnegligible.AirHammerAdvantagesVerylowrequiredbitweights.Highcompressiveforceatthebit.Minimaldeviationtenden

2、cies.Excellentbitlife--Bitsoftenreusableonsubsequentwells.Excellenton-bottomtime--Fewertripsimprovesaveragepenetrationrate.AirHammerAdvantageAirHammerTechnologyDrillstringrotationindexesthebitinsertstoafreshrocksurfaceduringeachbeatoftheairhammer.Therock’snaturaltendency

3、topropagatefracturesisusedtomaximizecuttingssize.Rpminthe20to30rangeusuallyprovidesmaximumairhammerpenetrationrates.TheIngersoll-RandQLSeriesMaximizesefficiencyanddevelopsgreaterpowerthananyotherhammer.Theirusewillresultin15%to30%higherrateofpenetrationovercompetitors’ha

4、mmers.Thisresultsinasignificantcostsavingstotheoperator.QLAirHammerSpecificationsQL-80:7inchOD,maximumbit10inchesQL-120:11inchOD,maximumbit171/2inchesIntroductiontoAirHammerTechnologyTheIngersoll-RandQLSeriesAirHammerpowercycleisillustratedonthefollowingslides:Ingersoll-

5、RandQLAirHammerMajorPartsCheckValveValvePressureClosePortDriveVolumeBlowPortPistonReturnundercutReturnChamberDistributorGuidePistonExhaustTubeBitIRQLAirHammerPowerCycleCirculatingBitOffBottomAirismeteredthroughblowholesinCylinder.BlowPortsclosed.TailofPistonsealsCylinder

6、feedportpreventingdrillfromrunningwhileoffbottom.FrontofPistonsealsoffReturnChamberfromhighpressureair,alsopreventingrunningoffbottom.IRQLAirHammerPowerCycleCycleStartValveclosed.BlowPortsclosed.Cylinderfeedportisopen,allowinghighpressureairtoenterReturnChamber.IRQLAirHa

7、mmerPowerCycleDriveChamberCloses.PistonTailBoresealswithDistributorGuidetobegincompressingairinDriveChamber.IRQLAirHammerPowerCycleFrontPortingCloses.AirinDriveChambercontinuestocompress.ReturnVolumeportingclosesandairinReturnChamberexpandspushingPistonupward.IRQLAirHamm

8、erPowerCycleReturnChamberExhaustsAirinDriveChambercontinuestocompress.InertiaofPistoncontinuesupwardtra