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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(dòng)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(diǎn)實(shí)驗(yàn)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(dòng)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(dòng)狀態(tài)下的震動(dòng)問題,推導(dǎo)了橫向耦合振動(dòng)的微分方程,通過方程求解得出了耦合振動(dòng)的動(dòng)力響應(yīng)表達(dá)式及耦合振動(dòng)下隔水管最大振動(dòng)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(dòng)位移的影響。結(jié)果表明:考慮鉆井液流動(dòng)條件下得到的隔水管橫向最大振動(dòng)位移要大于不考慮鉆井液流動(dòng)時(shí)計(jì)算結(jié)果;最大橫向振動(dòng)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(dāng)隔水管壁厚及波浪周期變化引起隔水管橫向振動(dòng)固有頻率與波浪橫向振動(dòng)頻率相接近時(shí),隔水管的
3、橫向振動(dòng)位移將急劇增大,對隔水管的安全設(shè)計(jì)與評估具有一定的參考價(jià)值。關(guān)鍵詞:海洋鉆井;隔水管-鉆井液;橫向耦合振動(dòng);動(dòng)力響應(yīng);橫向位移;影響因素中圖分類號:TE21 文獻(xiàn)標(biāo)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