牙轮钻头以车代磨加工工艺研究Ξ

X(,637001),;,,,,;;;;TE821.1,,,,,,1,,,,,,181/2XHP20,611,415,196,,20CrNiMo,20Ni4Mo,,,123451,203Vol.20No.319988JournalofSouthwestPetroleumInstituteAug1998X19980324,,1965,,,CAD/CAM©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:(1),,;(2)R,;(3),,2,M21203,,,R3,,,,,,,,,;,,,,,,,3(:)[1],061998©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:311,,,,,[2],,312(R),,,,(:),313,,,,,,,,,4,TiN,n=300400r/min,f=(0.050.1)mm,,,,,,(1):5min,;4min,100,(2),IT5,Ra1.250.2um,(3),,,,5,1PaulKennethWright.ManufacturingInteligence.Addision-wesleyPublishingCompany,INC.NY,USA,19912..:,1995()163:©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3):5254YuZiqing(XianPetroleumInstitute,Shaanxi,710065)Automaticcontrolofboreholetrajectoryisoneofthemostfrontierresearchareasindrillingengi2neering.Thispaperpresentstheresultsofastudyontherealizationofautomatictrajectorycontrolwithcontrollableeccentrictoimprovetheprecisionofcon2trolandreducedrillingcost.Thecontrollableeccen2tricisakindofdownholeguideddrillingtoolconsist2ingofacentralaxle,measuringandcontrollingsys2temunits,eccentricbladesandeccentricshell,whichcanbecontrolledwithinthewellboreandcanbeusedwithrotarydrilling.Automatictrajectorycontrolisrealizedduringdrillingbywayofadjustingtheforceofeccentricbladesagainstwellwallandthelengthofthebladesatalltime.Whencontrollableeccentricisusedindrillingpractice,trajectorycon2trolcanbeperformedwithouttrippingfrequently.Thisfeatureofthemethodhasgreatsignificanceandprospectsinaccomplishingthegoalofhighly-denseclusterdrilling,allkindsofdirectionaldrilling,hori2zontaldrillingandemergencydrilling.Keywords:Borehpletrajectory;Controlsystem;Method;ControllableeccentricMechanisticResearchonSelf-excitedOscil2latingImpulseJetFlow,JSWPI,1998,20(3):5558JiangHaijun(Dept.ofPetroleumEngineering,SW2PI,Sichuan,637001),LiaoRongqingFirstlyabriefreviewofpreviousresearchesonself-excitedoscillatingimpulsejetflow(SEOIJF)ispresentedinthepaper.Basedonthisandaccord2ingtothetheoryoffluidnetwork,wesimplifythephysicalmodelofself-excitedoscillatingimpulsejetflowbyapplyingtheprincipleofelectriccircuitwithloadresistance.Basedonanalog,webuildthemath2ematicalmodel.Indiscussingthesolutionofnonlin2earequations,weanalyzetheformativemechanismofimpulsejetflowbyusingthetheoryofmodernself-organization.Becauseofthesystemscomplexityandthesimulationsapproximation,ifonewantstoknowunderwhichconditionsstabledissipationstructureandstablefrequencycanbeformed,onemayneedtoemploymorecomplexanalogycircuitwithnonlinearanalogandhavemoredependenceondetailedexperimentalstudies.Keywords:Jetdrillingtheory;Nozzle;Oscillator;Pulse;Flowmodel;MechanismTheProcessingofRollerConeBitwithGrind2ingInsteadofCutting,JSWPI,1998,20(3):5961XiaoXiaohua(Dept.ofMechanicalEngineering,SWPI,Sichuan,637001),LiuQingyou,LuoMingdongThestructuralpropertiesandperformancebe2haviorofRollerConeBitusedinoildrillingaredis2cussed.ThemethodsandtechnologicalcharacterofRollerConeBitprocessingareanalyzed,andprob2lemsassociatedwithconventionalgrindingprocessingoftheinternalholeandsecondaryradialplacingarediscussedindetail.Afurtheranalysesismadeonthetechnologicalaspectsofreplacingcuttingbygrind2ing,includingfeatureofthemachinetools,selectionandperformanceofthecuttingtools,selectionofthecuttingregimes,propertyofthecuttingfluid,andmountingandlocating,etc.Thevalidityandvalueofthemethodofprocessingrollerconebitwithgrindinginsteadofcuttingisdemonstratednotonlybythereductioninproductioncost,butalsobypro2longedworkingtimeofthebitasshownbythewellsitestatisticdata.Keywords:Rollerbit;Machining;Technologicalpro2cess;Method;ResearchGeneticAlgorithmsasAppliedtoRegressionAnalysisofCuttingExperimentsData,JSW2PI,1998,20(3):6263ZhouJianxin(Dept.ofMechanicalEngineering,BeijingUniversityofScienceandTechnology,Beijing,100081),LiuYutong,YuQixunInthispaper,GeneticAlgorithms(GA)asusedinregressionanalysisisintroduced.TheGAispro2grammedwithDatabase(FoxPro2.6forWin2dows),inwhichthegeneistransferredintofield,chromosomeintorecord,populationintotable,andgeneticoperatorintodatabasesoperator.WiththeproposedGeneticAlgorithms,regressionanalysisis4Abstract©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.