深海水下采油树下放安装过程分析与研究  

Research on the Running Installment Process of Deep Sea Underwater Christmas Tree

作　　者：龚铭煊[1] 刘再生[1] 段梦兰[1] 王建国[1] 张明辉[1] 

机构地区：[1]中国石油大学(北京)海洋油气研究中心

出　　处：《石油机械》2013年第4期50-54,共5页China Petroleum Machinery

基　　金：国家863计划海洋技术领域重点课题"水下采油树关键技术研究及成套设备研制"(SS2012AA090306);国家973项目"深海工程结构的极端环境作用与全寿命服役安全"之子课题2"深海柔性结构的非线性流固耦合振动与破坏机理"(2011CB013702)

摘　　要：通过对深海水下采油树下放安装工艺流程进行分析,确定了不同安装阶段的载荷情况和边界条件,建立了水下采油树下放安装过程下放钻杆的力学分析模型,对模型进行了有限元计算,分析不同边界条件和载荷作用下下放钻杆的应力、横向位移和变形情况。分析结果表明,深海水下采油树下放安装过程中,下放钻杆在波浪、海流和平台偏移的共同作用下,会产生较大应力,最大应力值达到166.064 MPa;水下采油树还未安装到位与水下井口连接的工况条件下,下放钻杆与平台连接处附近承受的最大总应力为137.841 MPa,下放钻杆下端横向位移最大可达59.64 m;水下采油树安装到位并与井口连接的工况条件下,水深40 m附近总应力达到最大为166.064 MPa。The running installment technological process of deep sea underwater christmas tree was analyzed. The loads and boundary conditions at different installment stages were determined. Then, the mechanical analysis model of drillpipe running in the running and installment process of underwater christmas tree was established. The finite element calculation of the model was conducted. The stress, lateral displacement and deformation of running drillpipe under the effects of different boundary conditions and different loads were analyzed. The findings show that in the running installment process of the christmas tree the maximum stress produced by the running drillpipe will reach 166. 064 MPa due to the combined effect of wave, ocean current and platform migration. The total maximum stress near the running drillpipe and platform connection reaches 137. 841 MPa when christmas tree is not installed in place and not connected with underwater wellhead. The maximum lateral displacement of the lower end of running drillpipe may reach 59.64 m. The total maximum stress in the 40 m-deep place reaches 166. 064 MPa when christmas tree is installed in place and connected with underwater wellhead.

关 键 词：深海 水下采油树 下放安装 有限元计算 偏移量 

分 类 号：TE952[石油与天然气工程—石油机械设备]