深水柔性立管整体性能分析

摘要/Abstract

摘要：

海洋软管在海洋油气资源开发中起到关键的作用.由于其耐腐蚀性强,地形适应性好,连续长度长,安装方便等优点,逐渐取代了传统的海洋钢管.国际上已在深水油气田开发中大量使用柔性立管来连接浮式结构与海底生产系统,但在国内还没有深水柔性立管的设计和生产技术.主要针对柔性立管在位工况下的整体性能如何分析来进行系统介绍.将立管参数,环境参数,与立管相连的浮式生产储卸油装置(FPSO)参数,立管造型等作为整体分析的输入条件,利用分析软件,进行静态分析,动态分析,规则波分析和不规则波分析.根据分析结果即可判断柔性立管是否符合应用要求.

关键词: 海洋油气管道, 柔性立管, 复合软管, 浮式生产储卸油装置, 系泊分析, 整体分析

Abstract:

Ocean flexible pipe is of great importance in ocean oil resource exploitation. Due to its outstanding capability of erosion resistance, terrain adaptability, long continuous length and convenient installation, flexible pipe is gradually replacing traditional steel pipe. Flexible riser has been widely used among foreign countries to connect the floating structures to underwater production system of deepwater oil/gas field. However, there is no design and manufacturing technology in China for deepwater flexible pipe. Here we focus on the introduction of analysis method on the global performance of flexible pipe in-place condition. Taking riser parameters, environmental conditions, parameters of the floating production, storage and offloading system, and the riser shape as input parameters, static analysis, dynamic analysis, regular wave analysis and irregular wave analysis can be performed using certain software. Based on the analysis results, one can easily judge whether the designed riser can meet the application requirements.

Key words: marine oil and gas pipeline, flexible riser, composite flexible pipe, floating production, storage and offloading, mooring analysis, global analysis

中图分类号:

TE832

鲁成林, 李兰, 宋平娜, 曹静, 沙勇, 周巍伟. 深水柔性立管整体性能分析[J]. 海洋工程装备与技术, 2015, 2(2): 88-92.

Cheng-lin LU, Lan LI, Ping-na SONG, Jing CAO, Yong SHA, Wei-wei ZHOU. Global Performance Analysis for Deepwater Flexible Riser[J]. Ocean Engineering Equipment and Technology, 2015, 2(2): 88-92.

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参考文献 9

[1]	American Petroleum Institute.API SPEC 17J. Specification for unbonded flexible pipe[S]. 2008.
[2]	American Petroleum Institute.API RP 17B. Recommended practice for flexible pipe[S]. 2008.
[3]	International Organization for Standardization. ISO 13628-2. Petroleum and natural gas industries--design and operation of subsea production systems. Part 2: unbonded flexible pipe systems for subsea and marine application[S]. 2006.
[4]	Det Norske Veritas.DNV-OS-F201. Dynamic risers[S]. 2001.
[5]	Det Norske Veritas.DNV-OS-E301. Position mooring[S]. 2008.
[6]	Det Norske Veritas.DNV-RP-C205. Environmental conditions and environmental loads[S]. 2007.
[7]	Det Norske Veritas.DNV-OS-F101. Submarine pipeline systems[S]. 2012.
[8]	Det Norske Veritas.DNV-RP-C103. Column stabilized units[S]. 2005.
[9]	American Petroleum Institute.API RP 2SK. Recommended practice for design and analysis of station-keeping systems for floating structures[S]. 2005.

序号	名称	功能
1	骨架层	支撑内压密封层,防止内压密封层压溃
2	内压密封层(内衬层)	形成输送流体的密封层
3	抗压铠装层	承受内压及外压
4,6,8	耐磨层	固定金属层,防止金属与金属接触磨损
5,7	抗拉铠装层	承受轴向拉力
9	中间包覆层	限制抗拉层钢丝变形,减少磨损,双重保护
10	保温层	防止热量流失
11	外包覆层	抗机械损坏,防止海水进入

参数	取值
内径/mm	203.2
外径/mm	418.2
单重/(kg·m^-1)	218
弯曲刚度/(kN·m²)	472
轴向刚度/(MN)	660
扭转刚度/(kN·m²·rad^-1)	7390
存储弯曲半径/m	2.74
操作弯曲半径/m	4.0
允许操作最大曲率/m^-1	0.25
允许最大拉力/kN	2300
允许最大压缩/kN	100

偏移方向	图示
Near offset (Near) 船的偏移作用方向与立管平面平行,朝向海床连接处.偏移作用与来流方向同向.船头与来流存在一个和工况相关的夹角α
Far offset (Far) 船的偏移作用方向与立管平面平行,朝向远离海床链接处的方向.偏移作用与来流方向同向.船头与来流存在一个和工况相关的夹角α
Cross offset (Cross) 船的偏移作用在与立管平面垂直的方向上.偏移作用与来流方向同向.船头与来流存在一个和工况相关的夹角α.正负号用来区别两个等效的交叉偏移
Quartering near offset (Qnear) 船的偏移作用与立管平面成45°角,朝向海床连接处.船头与来流存在一个和工况相关的夹角α.正负号用来区别两个等效的偏移
Quartering far offset (Qfar) 船的偏移作用与立管平面成45°角,朝向远离海床连接处方向.船头与来流存在一个和工况相关的夹角α.正负号用来区别两个等效的偏移

极端荷载工况	环境方向	偏移方向
EX-01-Re/Ir	共线	Far
EX-02-Re/Ir		Near
EX-03-Re/Ir		Cross
EX-04-Re/Ir		Qfar
EX-05-Re/Ir		Qnear
EX-06-Re/Ir	交叉	Far
EX-07-Re/Ir		Near
EX-08-Re/Ir		Cross
EX-09-Re/Ir		Qfar
EX-10-Re/Ir		Qnear

极端荷载工况	环境方向	偏移方向	有效拉力/kN		最大曲率/m^-1
极端荷载工况	环境方向	偏移方向	最大	最小	最大曲率/m^-1
EX-01-Re	共线	Far	1002.3	-32.3	0.245
EX-02-Re		Near	741.7	-2.9	0.105
EX-03-Re		Cross	986.5	-31.5	0.223
EX-04-Re		Qfar	958.1	-28.2	0.226
EX-05-Re		Qnear	723.8	-3.1	0.121
EX-06-Re	交叉	Far	978.3	-37.0	0.222
EX-07-Re		Near	790.4	-22.5	0.132
EX-08-Re		Cross	748.9	-18.4	0.189
EX-09-Re		Qfar	774.1	-19.3	0.195
EX-10-Re		Qnear	789.0	-15.9	0.116