水力参数计算

Equationforcalculatinghydraulics1.喷嘴压降(pressuredropacrossbitnozzle)B=W.Q2/10858A2B：喷嘴压降(pressuredropacrossbitnozzle)：PSI。W：泥浆密度(mudweight)：PPG。Q：泵排量(flowrate)：GPM。A：喷嘴总面积(totalflowarea)：in22・近似的塑性粘度(estimatedplasticviscosity)PV=0.1W2.16PV:近似的塑性粘度(estimatedplasticviscosity)：CP。(厘泊)W：泥浆密度(mudweight)：PPG。钻头水功率(bithydraulichorsepower)BHP=Q.B/1714BHP:钻头水功率(bithydraulichorsepower):HP。Q：泵排量(flowrate)：GPM。B：喷嘴压降(pressuredropacrossbitnozzle)：PSI。喷嘴喷速(Nozzlevelocity)NV=0.32086Q/ANV:喷嘴喷速(Nozzlevelocity)：FPS。Q：泵排量(flowrate)：GPM。A：喷嘴总面积(totalflowarea)：in2冲击力(impactforce)IF=NV.W.Q/1932IF:冲击力(impactforce):lbs。W：泥浆密度(mudweight)：PPG。Q：泵排量(flowrate)：GPM。管内平均流速(averagevelocityinsidepipe)VP=24.5Q/12I2VP:管内平均流速(averagevelocityinsidepipe):FPM。Q：泵排量(flowrate)：GPM。I:管内径(pipeinsidediameter):in.7・管内临界流速(criticalvelocityinsidepipe)VCP=[1.08PV+1.08(PV2+9.3.RYP.W)o«5]/W.IPlasticfluidmodel(塑性流体)AssumesturbulencewhenREYNOLDSnumber>=2000(雷诺数>=2000为紊流)VCP:管内临界流速(criticalvelocityinsidepipe):FPS。PV:近似的塑性粘度(estimatedplasticviscosity)：CP。(厘泊)W：泥浆密度(mudweight)：PPG。I:管内径(pipeinsidediametei):inoYP：屈服点(yieldpoint):lbs/100in28.管内压力损失(pressurelossinsidepipe).VP<VCP层流(laminarflow)PL=(L.YP/225.I)+(VP.L.PV/1500.I2).VP水利计算公式DPg=l^°ixrxLgxQ很6dg4.86 乂4.32x1C4DP血=1.32：ExrxL血xQ1.864.32x1C4DP»E= 3 xrx应xQ2(D-DE)3x(D+Dg)2DP•鱼= 4.32抑 xrxL鱼xQ2(D-Dm)3x(D+Dm)2rxQ2x1031.78xAX2rx1C31.78xDPXVX=咛--VE(m)=21274Q