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Liuhua 11-1 FPSO FPS Mooring System Life Extension Evaluation and Challenging Issues

机译：流花11-1 FPSO和FPS系泊系统的延寿评估和挑战性问题

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Mooring system life extension for offshore floating production installation has become a hot topic for offshore industry as more and more floating units approach the end of their design lives. Some mooring system life extension projects have already been completed successfully, there are still some issues upon which the mooring industry has not reached consensus, such as field inspection capability/accuracy, uninspected items assessment, component degradation assessment, and acceptance criteria for numerical evaluation. This paper demonstrates two mooring system life extension processes located at Liuhua (LH) 11-1 oil field, following ABS rules as well as industry best practices. It also presents the challenging issues met during this long period of operation, initiated in 2016 and to be completed by end of 2019. Nanhai Shengli (NHSL) FPSO and Nanhai Tiaozhan (NHTZ) FPS are located in Liuhua 11-1 oil field. Both of the mooring systems were installed in 1995 with an originally designed life of 10 years, and already upgraded/replaced partially to extend their lives for continual safety operation. Thus, this is the second life extension for them, and some special challenges are presented. The upgrade of the mooring system is proposed based on inspection, testing, and analysis results for the existing mooring components. This paper focuses on some of the work that has been performed. These experiences may be helpful for the life extension of other similar mooring systems.
机译：随着越来越多的浮式装置接近其设计寿命，用于海上浮式生产装置的系泊系统寿命的延长已成为海上工业的热门话题。一些系泊系统寿命延长项目已经成功完成，但在系泊行业仍存在一些尚未达成共识的问题，例如现场检查能力/准确性，未检查项目评估，部件退化评估以及数值评估的验收标准。本文演示了遵循ABS规则和行业最佳实践的流花（LH）11-1油田的两个系泊系统寿命延长过程。它还介绍了从2016年开始并于2019年底完成的长期运营过程中遇到的挑战性问题。南海胜利（NHSL）FPSO和南海跳湛（NHTZ）FPS位于流花11-1油田。这两个系泊系统均于1995年安装，最初设计的使用寿命为10年，并且已经部分升级/更换，以延长其使用寿命，以实现持续的安全运行。因此，这是他们的第二次延寿，并提出了一些特殊的挑战。根据对现有系泊组件的检查，测试和分析结果，提出了系泊系统的升级方案。本文重点介绍已完成的一些工作。这些经验可能有助于延长其他类似系泊系统的寿命。

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