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ID:23800346
大小:4.52 MB
页数:104页
时间:2018-11-10
《油井变频电磁防蜡机理与实验分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、~、●’MechanismandExperimentalStudyofOil-WellVariableFrequencyElectromagneticParaffinControlDaiYue(Oil&GasFieldDevelopmentEngineering)DirectedbyProf.ZhangJianguoAbstractVariablefrequencyelectromagneticparaffincontroltechnologyisanewphysicalmethod,whichhaStheadvantageoverot
2、hermethodsofparaffincontrolinlowcost,reservoirprotection,longperiodofvalidity,andconvenientmanagement.Itisalleconomicalandpracticalparaffincontroltechnology,whichalsohasanobviouseffectandbroadprospect·Accordingtothevariablefrequencyelectromagneticparaffincontroltechnolog
3、y,inordertoenhaIlcetheefleetandreducethecostofelectromagneticanti—waxing,laboratoryexperimentisstudied,optimumworkingparametersareobtained,andelectromagneticparaffincontrolmechanismisrevealedinthispaper.Paraffindepositmechanismisanalyzed.Influencingfactorsofparaffindepos
4、itionare吼lmmadzed.Paraffinremovingandinhibitingtechnologiesaresummedup.ParametersofthetwovariablefrequencyelectromagneticparaffincontrolexcitationsourcesaremeaSured·Thecun?entwaveformoftypeIissawtoothwave,thevoltagewaveformoftypeIissquarewave,aIldthevoltagewaveformoftype
5、IIismodulatedtriangularwave·ElectromagneticvibrationofthetwoexcitationSOUrCeSshowsfixedfrequency,namely100Hz.Optimum.!workingparametersareobtainedbymeansofwaxdissolvingexperiment,micro‘observationtecllIlology,aIldmethodsofcoolingcalveandviscosity-temperaturecurve.Theopti
6、malgearofpulsewidthoftypeIisgear3,theoptimalexcitingelectriccurrentoftypeIis2·5八andtheoptimalcyclenumberofknoboftypeIIis3.Theparaffininhibitingeffecttreatedbyeletromagneticfieldunderoptimumparametersisverifiedsignificantlybythemeanoftheelectromagneticparaffincontroldynam
7、icexperiment.TheWaxdissolvingtimeissubStantiallvreducedintheclosecondition,andthefreezingpointisdecreasedby3-5"C.The11‰..瞎relationshipbetweenamplitudeofexcitedmechanicalvibrationandexcitingelectriccurrentisanalyzedintheexperimentofpipelinemechanicalvibrationexcitedbyelec
8、tromagneticfield.Mechanicalvibrationwaveexcitedbyelectromagneticfieldisrelativelyregularsinewave,andnoo
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