• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Ocean, Offshore and Arctic Engineering >METHODOLOGY FOR ASSESSING WELLHEAD INTEGRITY DURING ITS LIFE CYCLE
【24h】

METHODOLOGY FOR ASSESSING WELLHEAD INTEGRITY DURING ITS LIFE CYCLE

机译：用于评估生命周期中的井口完整性的方法

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The wellhead is an important component in the context of well integrity and operational safety, as it serves as a link between well and riser in offshore oil wells. Wellheads, combined with the BOP and/or the Christmas Tree, act as the final barrier element preventing leakage of oil from the well into the environment. The wellhead must sustain loads from the casings, which are hung into it through the casing hangers, as well as sustain loads from the riser, which is connected at the top of the BOP (right above the wellhead) through the lower flex joint. In this work, we propose a methodology for analyzing the wellhead, considering a mechanical system that couples the vessel, the riser, the wellhead itself the conductor and surface casings, and their interaction with the soil. The simulation of this coupled system provides the loads that are transmitted to the wellhead due to its coupling with riser, vessel, casing, and soil. Then, these loads are converted into stresses and a criterion, such as yield, is applied to verify if they will cause wellhead failure. The objective of this work is to assess wellhead failure due to environmental loads (waves, currents) acting on the riser, by varying parameters such as significant wave height, peak period and current speed, as well as assess wellhead integrity during its lifecycle for operational and survival conditions. Results show that the wellhead may fail under certain environmental conditions, which would compromise well integrity and cause leakage from the well. The analysis performed here, which is deterministic, also provides a basis for a subsequent probabilistic analysis from which the wellhead reliability can be found, based on uncertainties such as the sea state parameters.
机译：井口是在良好的完整性和操作安全性的上下文中的重要组成部分，因为它是海上油井井和立管之间的联系。井口，与BOP和/或圣诞树相结合，充当最终的屏障元件，防止从井中渗漏到环境中。井口必须保持从壳体，其穿过套管悬挂器挂到它的负载，以及承受来自提升管，其在所述BOP（右图上述井口）的通过下部柔性接头顶端连接的负载。在这项工作中，我们提出了分析井口，考虑到机械系统，耦合器，立管，井口本身的导体和表层套管，以及它们与土壤相互作用的方法。该耦合系统的仿真提供了由于其与提升管，容器，壳体和土壤的耦合而传递到井口的负载。然后，将这些负载转换为应力，并且应用诸如产量的标准以验证它们是否会导致井口故障。这项工作的目的是通过不同的参数（如显着波高，峰值周期和电流速度）的环境负荷（波浪，电流）来评估井口故障，如显着的波形高度，峰值周期和电流速度，以及在其生命周期中评估井口完整性和生存条件。结果表明，井口在某些环境条件下可能会失败，这会损害完整性并导致井的泄漏。这里执行的分析是确定性的，还提供了随后的概率分析，其基于诸如海区参数的不确定性来找到井口可靠性的基础。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号