Analysis on the Operation Fatigue of Deepwater Drilling Riser System

The Open Petroleum Engineering Journal Pub Date : 2016-12-14 DOI:10.2174/1874834101609010279

Liu Xiuquan, C. Guoming, Fu Jingjie, Jiang Jingqi, Song Qiang, Chang Yuanjiang

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引用次数: 4

Abstract

Abstract: Fatigue is one of main failure modes of deepwater drilling riser system. Analysis models of wave induced fatigue and vortex induced fatigue of deepwater drilling riser are established according to the riser connection, installation and hang-off operations. Characteristics of wave induced fatigue and vortex induced fatigue of riser system in different operation modes are studied. The influence of each operation fatigue on the combined fatigue is also identified. The results show that wave induced fatigue damage and vortex induced fatigue damage of upper riser are large in installation and hard hang-off modes. The fatigue damage of riser system in soft hang-off mode is less than that in hard hang-off mode. The combined fatigue damage of the upper and lower riser is large. The lower riser is under the influence of wave induced fatigue and vortex induced fatigue, while the upper riser is mainly under the influence of wave induced fatigue, especially that in installation and hang-off modes. The fatigue damages of riser in installation and hang-off modes have a great influence on the combined fatigue of riser and cannot be neglected in riser fatigue analysis.

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深水钻井隔水管系统作业疲劳分析

摘要:疲劳是深水钻井隔水管系统的主要失效形式之一。根据隔水管连接、安装和悬挂作业，建立了深水钻井隔水管波浪疲劳和涡激疲劳分析模型。研究了不同工作模式下立管系统的波致疲劳和涡致疲劳特性。确定了各工序疲劳对组合疲劳的影响。结果表明:在安装和硬悬挂工况下，上隔水管的波致疲劳损伤和涡致疲劳损伤较大;软悬挂下立管系统的疲劳损伤小于硬悬挂下立管系统的疲劳损伤。上下隔水管的复合疲劳损伤较大。下隔水管主要受波致疲劳和涡致疲劳的影响，上隔水管主要受波致疲劳的影响，特别是在安装和悬挂模式下。立管在安装和悬挂模式下的疲劳损伤对立管的综合疲劳有很大的影响，在立管疲劳分析中是不可忽视的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Open Petroleum Engineering Journal

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