基于新概念水中张力生产平台的柔性跨接管对刚性立管系统整体特性的参数影响研究(英文)

Parametric Study on the Effects of Flexible Jumpers on the Global Behavior of the Rigid Riser based on an Innovative Subsurface Tension Leg Platform

水中张力生产平台(STLP)是一种新概念超深海油气开发装置,实现了浅水采油装备的超深海作业。柔性跨接管解耦了浮动式海洋平台运动与STLP的直接作用。尽管柔性跨接管的解耦效应已在一定程度得到证实,但是其对刚性立管系统的具体影响,仍然有许多问题存在。文章基于新概念水中张力平台,详细地探究了柔性跨接管对刚性立管系统整体特性的参数影响,阐述了STLP的基本工作原理与数值模拟方法。通过对STLP的刚性立管系统在不同海洋环境要素下的响应、干涉、强度、屈曲以及疲劳分析,对比探究了柔性跨接管对刚性立管系统的具体影响。特别地,文中亦探究了浮动式海洋平台的不同偏移参数的影响。该文研究所得的结论对于自站式混合立管的工程设计和分析具有广泛适用性。

The Subsurface Tension Leg Platform（STLP） concept is considered as a competitive alternative system to support lower-rated well completion equipment and rigid risers in ultra-deep water for offshore petroleum production. Flexible jumpers connecting the vessel to the STLP effectively isolates the dynamic vessel motions from the rigid risers. Though the decoupled effect from flexible jumpers was confirmed to some extent, many problems still remain on the detailed influence of flexible jumpers. This paper details the results of a study to investigate the effects of flexible jumpers on the global behavior of the rigid riser based on STLP concept. A general description of STLP/Flexible jumper configuration as well as the numerical modeling methodology is introduced. The comparison results, such as riser global response, riser interference, riser＇s strength, buckling as well as fatigue performance, in relation to STLP with and without flexible jumpers under the excitations of currents, random waves and vessel motions are presented and discussed in detail. The effect of different vessel offset directions on the global behavior of the rigid riser is also considered. The obtained conclusions have wide ranging applicability in reference to the engineering design and analysis aspects of deepwater free standing hybrid riser concepts.