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Validation of Global Riser/Wellhead Analysis Using Data from a Full-Scale Measurement Campaign

机译:使用全面测量活动中的数据验证全球上升管/井口分析

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Fatigue damage predictions of risers and wellhead/casing systems due to drilling operations requirernpredictive modeling techniques for load calculation/estimation. This work attempts to address thernuncertainty as to whether the global riser analyses are overly conservative due to model idealizations,rnanalytical assumptions, the use of time- or frequency-domain techniques, and incorporation of certain linearrnor non-linear behavior. To address these questions, a field measurement program was executed to obtainrnvessel, riser and stack motions data, which were used to validate analytical models and procedures.rnA real-time monitoring system was deployed on a 6th generation semi-submersible mobile offshorerndrilling unit operating in a shallow water, harsh environment region. Accelerations and angular ratesrnwere captured on the Lower Marine Riser Package (LMRP), drilling riser and vessel. The metocean datarnconsisting of measured seastates and full-depth current profiles, as well as riser tensions, mud weights, andrnvessel offsets were also concurrently recorded. The global models of the riser, wellhead, stack, casing andrnsoils were created using two in-house software, DERP (frequency-domain) and RAMS (both frequencyandrntime-domain), using "as-designed" input information.
机译:由于钻井作业引起的立管和井口/套管系统的疲劳损伤预测需要用于负荷计算/估算的预测建模技术。这项工作试图解决由于模型理想化,分析假设,时域或频域技术的使用以及某些线性或非线性行为的合并而导致的整体立管分析是否过于保守的不确定性。为了解决这些问题,执行了现场测量程序以获取容器,立管和堆垛运动数据,这些数据用于验证分析模型和程序。rn在第6代半潜式移动海上钻井平台上部署了实时监控系统浅水,恶劣环境区域。在下部船用立管组件(LMRP),钻探立管和船只上捕获了加速度和角速度。还同时记录了由测得的海况和全深度洋流剖面组成的气象数据,以及立管张力,泥浆重量和容器偏移量。使用两个内部软件,即“设计的”输入信息,使用两个内部软件DERP(频域)和RAMS(频域和时域)创建了上升管,井口,烟囱,套管和土层的全局模型。

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