超深水环境下新概念张力系泊式水中生产平台力学特性研究(第一部分)

文章研究聚焦于一种新概念张力系泊式水中生产平台(STLP),该平台实现了浅水采油设备和技术在超深水环境下的生产作业。STLP位于海面下一定深度处,充分降低了海面灾害性海洋环境要素(巨浪、强流)的影响。文中详细研究了在3 000 m水深环境下STLP的力学特性。其中,该专题的第一部分重点研究刚性立管的力学特性,介绍了STLP的设计原理,给出了STLP的理论模型及数值模拟方法。进一步地,给出了STLP的设计流程与理论。在此基础上,研究并讨论了刚性立管在3 000 m水深环境下的强度、屈曲和疲劳特性。最后,给出了研究结论。特别地,文中研究所得到的结论对于自站式混合立管的工程设计和分析均具有广泛适用性。

Investigations on the Mechanical Behavior of an Innovative Subsurface Tension Leg Platform in Ultra-Deep Water(Part I)

This paper focuses on an innovative technology of the Subsurface Tension Leg Platform (STLP), which is considered as a competitive alternative system to support lower-rated well comple-tion equipment and rigid risers for large ultra-deep water oil field development. STLP is located be-low Mean Water Level (M.W.L) to minimize direct wave loading and mitigate the effect of strong surface currents.This paper investigates in detail the mechanical behavior of the STLP at a depth of 3 000 meters. Part I of this topic here addresses the mechanical behavior of the rigid riser. Firstly, the design philosophy of STLP is introduced. Then, the mathematical models and numerical model-ing approach are presented. After that, the related design process and theory are presented. On this basis, the calculation results of rigid riser's strength, buckling as well as fatigue performance are presented and discussed to ensure the technical feasibility of the STLP. Finally, conclusions and dis-cussions are made for the studied concept.The obtained conclusions also have wide ranging applica-bility in reference to the engineering design and design analysis aspects of deepwater free standing hybrid riser system.