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软管铺设中外包覆层损伤处理
A preliminary study on the management of external polymer layer damage during flexible pipe installation
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- DOI:
- 10.3969/j.issn.1001-2206.2025.S.026
- 作者:
- 张翊飞
ZHANG Yifei
- 作者单位:
- 中国船级社天津分社, 天津 300450
Tianjin Branch of China Classification Society, Tianjin 300450, China
- 关键词:
- 复合柔性软管; 外包覆层; 高密度聚乙烯（HDPE）; 结晶度
composite flexible pipe;external polymer layer;high-density polyethylene (HDPE);crystallinity
- 摘要:
- 以复合柔性软管外包覆层损伤作为切入点，结合软管相关标准，梳理外包覆层技术要求，并针对某油田开发项目软管铺设过程中出现的软管外包覆层损伤现象，深入分析其原因和处理过程。研究发现，施工环节导致外包覆层损伤的主要因素涵盖软管的材料质量、铺设施工工艺、施工人员操作及机械损伤4个方面。针对倒驳过程中造成的软管外包覆层损伤，通过对倒驳最小操作半径的论证，将其由原来的4.5 m调整为5.0 m。对于海上铺设过程中出现的软管外包覆层开裂和褶皱问题，在分析产生原因的基础上，结合理论分析与实验对比，验证了软管外包覆层材料的结晶度及低温韧性能够满足使用要求。此外，还分析了海上施工过程中埋设犁造成软管损伤的原因，并提出相应的改进措施。研究结果可为同类工程中软管外包覆层相关标准理解和质量控制提供借鉴。
With the damage to the external polymer layer of composite flexible pipe as the entry point, this paper established clear technical specifications for the external polymer layer by referencing relevant API standards. It further analyzed a case of external polymer layer damage that occurred during the flexible pipe installation process in a specific oilfield development project, identifying the root causes and detailing the remedial actions taken. The study reveals that construction-related quality issues leading to external polymer layer damage can be categorized into four key factors: flexible pipe material quality, installation procedures, personnel operations during construction, and mechanical damage. In response to damage caused during the reverse connection process, the minimum operational bending radius was revised from 4.5 m to 5.0 m. Regarding the cracking and wrinkling observed during offshore installation, the study confirms through cause analysis, theoretical analysis, and experimental comparison that the crystallinity and lowtemperature toughness of the external polymer layer material meet the required performance standards. Furthermore, the research investigated the causes of damage resulting from the plough burial process during offshore installation and proposed corresponding mitigation measures. The findings of this study serve as a reference for understanding relevant standards and enhancing quality control of external polymer layers in similar engineering projects.