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1、第37卷第1期石油鉆采工藝Vol.37No.12015年1月OILDRILLING&PRODUCTIONTECHNOLOGYJan.2015文章編號:1000–7393(2015)01–0025–05doi:10.13639/j.odpt.2015.01.006海洋鉆井隔水管-鉆井液橫向耦合振動特性王宴濱 高德利 房 軍(中國石油大學(xué)石油工程教育部重點實驗室,北京 102249)引用格式:王宴濱,高德利,房軍.海洋鉆井隔水管-鉆井液橫向耦合振動特性[J].石油鉆采工藝,2015,37(1):25-29.摘
2、要:針對鉆井隔水管與鉆井液在上返流動狀態(tài)下的震動問題,推導(dǎo)了橫向耦合振動的微分方程,通過方程求解得出了耦合振動的動力響應(yīng)表達式及耦合振動下隔水管最大振動位移,并討論了頂張力、隔水管壁厚、鉆井液上返流速、水深、波高、波浪周期對隔水管橫向振動位移的影響。結(jié)果表明:考慮鉆井液流動條件下得到的隔水管橫向最大振動位移要大于不考慮鉆井液流動時計算結(jié)果;最大橫向振動位移隨頂張力及水深的增大而減小,隨環(huán)空鉆井液返速及波高的增大而增大,當隔水管壁厚及波浪周期變化引起隔水管橫向振動固有頻率與波浪橫向振動頻率相接近時,隔水管的
3、橫向振動位移將急劇增大,對隔水管的安全設(shè)計與評估具有一定的參考價值。關(guān)鍵詞:海洋鉆井;隔水管-鉆井液;橫向耦合振動;動力響應(yīng);橫向位移;影響因素中圖分類號:TE21 文獻標識碼:ACharacteristicanalysisontransversecouplingvibrationofoffshoredrillingriser-drillingfluidWANGYanbin,GAODeli,FANGJun(MOEKeyLaboratoryofPetroleumEngineering,ChinaUniv
4、ersityofPetroleum,Beijing102249,China)Abstract:Basedonthevibrationofdrillingriseranddrillingfluidintheupwardreturnflowstate,thedifferentialequationoftransversecouplingvibrationhasbeendeduced.Viatheequationsolving,thedynamicresponseexpressionofcouplingvibr
5、ationandthemaximumvibrationdisplacementofriserinthecouplingvibrationhavebeenfiguredout.Besides,theeffectsoftoptension,riserwallthickness,upwardreturnflowrateofdrillingfluid,waterdepth,waveheightandwaveperiodonthetransversevibrationdisplacementofriserhaveb
6、eendiscussed.Accordingtotheresults,themaximumtransversevibrationdisplacementofriser,whichwascalculatedwithconsiderationofthedrillingfluidflow,isgreaterthanthecalculationresultwhentheflowofdrillingfluidisnotconsidered;themaximumtransversevibrationdisplacem
7、entdecreasesasthetoptensionandwaterdepthincrease,andincreasesasthereturnspeedofannulardrillingfluidandwaveheightincrease;whenthechangesofriserwallthicknessandwaveperiodcausethetransversevibrationinherentfrequencyofrisertobeclosetothetransversevibrationfre
8、quencyofwave,thetransversevibrationdisplacementofriserwillsharplyincrease.Thathascertainreferencevaluetothesafetydesignandassessmentofriser.Keywords:offshoredrilling;riser-drillingfluid;transversecouplingvibration;d