【7A文】钻井工程英文课件14.1 Pressures.ppt

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1、114.1-1Pressures2APIPowerLawModelK=consistencyindexn=flowbehaviourindex0APIRP13D3RotatingSleeveViscometerVISCOMETERRPM3100300600(RPM*1.703)SHEARRATEsec-15.11170.35111022BOBSLEEVEANNULUSDRILLSTRING4PressureDropCalculationsExampleCalculatethepumppress

2、ureinthewellboreshownonthenextpage,usingtheAPImethod.Therelevantrotationalviscometerreadingsareasfollows:R3=3(at3RPM)R100=20(at100RPM)R300=39(at300RPM)R600=65(at600RPM)5PPUMP=DPDP+DPDC+DPBITNOZZLES+DPDC/ANN+DPDP/ANN+DPHYDQ=280gal/minr=12.5lb/galPress

3、ureDropCalculationsPPUMP6Power-LawConstant(n):PressureDropInDrillPipeFluidConsistencyIndex(K):AverageBulkVelocityinPipe(V):OD=4.5inID=3.78inL=11,400ft7EffectiveViscosityinPipe(me):PressureDropInDrillPipeReynoldsNumberinPipe(NRe):OD=4.5inID=3.78inL=1

4、1,400ft8NOTE:NRe>2,100,soFrictionFactorinPipe(f):PressureDropInDrillPipeOD=4.5inID=3.78inL=11,400ftSo,9FrictionPressureGradient(dP/dL):PressureDropInDrillPipeOD=4.5inID=3.78inL=11,400ftFrictionPressureDropinDrillPipe:DPdp=665psi10Power-LawConstant(n)

5、:PressureDropInDrillCollarsFluidConsistencyIndex(K):AverageBulkVelocityinsideDrillCollars(V):OD=6.5inID=2.5inL=600ft11EffectiveViscosityinCollars(me):ReynoldsNumberinCollars(NRe):OD=6.5inID=2.5inL=600ftPressureDropInDrillCollars12OD=6.5inID=2.5inL=60

6、0ftPressureDropInDrillCollarsNOTE:NRe>2,100,soFrictionFactorinDC(f):So,13FrictionPressureGradient(dP/dL):FrictionPressureDropinDrillCollars:OD=6.5inID=2.5inL=600ftPressureDropInDrillCollarsDPdc=227psi14PressureDropacrossNozzlesDN1=1132nds(in)DN2=1132

7、nds(in)DN3=1232nds(in)DPNozzles=1,026psi15PressureDropinDC/HOLEAnnulusDHOLE=8.5inODDC=6.5inL=600ftQ=280gal/minr=12.5lb/gal8.5in16Power-LawConstant(n):FluidConsistencyIndex(K):AverageBulkVelocityinDC/HOLEAnnulus(V):DHOLE=8.5inODDC=6.5inL=600ftPressur

8、eDropinDC/HOLEAnnulus17EffectiveViscosityinAnnulus(me):ReynoldsNumberinAnnulus(NRe):DHOLE=8.5inODDC=6.5inL=600ftPressureDropinDC/HOLEAnnulus18So,DHOLE=8.5inODDC=6.5inL=600ftNOTE:NRe<2,100FrictionFactorinAnnulus(f):DPdc/hole=31.6psiPressureDropinDC