煤层气储层特征,开发开采技术和工艺
ApplicationResearch
HighPressureontheDrillingandChamberingTechniquewithWaterJetinUndergroundCoalbed
andNaturalGasMethaneDrainageLinFujin(PetroleumEngineering)
WeidongDirectedbySeniorEngineerZhou
researchprofessorSunDongling
Abstract
Thecoalandgasoutburst,whichis
coalmining,isaakindofseriousprojectdisasterintheprocessofmajorproblemthaturgentlyneedstobesolvedtoguaranteethecoalminesafetyinproduction.Thebasicmeasuretocontrolcoalandgasoutburstisgasdrainage,buttheconstructionofdrillingholesisstillthedifficult
usingthedrillingbitofprojectproblemuntilnOW.However,higllpressurewaterjetto
aCarryouttheconstructionofddll吨holes
newwayandchamberingofgasdrainagehasgreatsuperioritywithwhichthetraditionalmechanicalcandrillingbitisunabletocompare.Thistechnique
technicalapproach.
Fluidbestudiedde印lyasaandMechanics,JetMechanics,ImpactDynamics,andotherrelatedtheoriesandmethodswereusedforanalyzingthedesignvaluesofthedrillingandchamberingtechnique谢廿1lli曲pmssurewaterjet.Inthisdissertation,theauthorexploredthestructuralcharacteristicsofhighpressurewater
referredinthecoal
lawsonjet,pointingoutthejetproblemsofjetdrillingholesflowproblems.Theoftheturbulentbedareessentiallytheturbulentimpactjetofchangingflowarestructureofdrainagearea,velocityandpressureaxesjetexploited,gettingthechanginglawsofflowfieldinboring.'WllendrillingholesinCoalseam,turbulentimpactbasinofhigh-pressurewaterjet
areacailbedividedintofreejetarea,theimpactandthewallarea.Theaxesvelocityofturbulentimpactjethasdifferentattenuationlawsindifferentareas.Takingthetheorystudyofthehighpressurewaterjetand
jetthenumericalsimulationresearchresults锻the
drilling
allfoundation,,threetypesofbitsthatareoptimalforandcharnbefingincoalbedweredeveloped,theseainclude:animpellerrotaryjetbit,offsetauto-rotaryjetbit,andchamberingjetbit.Thedevelopedbitsofjetdrillingweretakenintothetestofdrillinginthecoal—bedofXinzhuangziCoalMine.Theexperimentindicatedthatthedevelopedoffsettypeauto—gyrationbitsandimpellertypegyrationbitshavewe.1labilitiesforbreakingcoalanddrillingefficiency.Thedevelopedhighpressurewaterjetbitswerealsousedforchamberinginthecoal-bedoftheSecondCoalMineofDatong,anda
百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读,免费范文网,提供经典小说教育文库高压水射流钻扩孔技术在井下煤层气开采中的应用研究(3)在线全文阅读。
相关推荐: