Petroleum Science >2012,??Issue 4:??527-531 DOI: https://doi.org/10.1007/s12182-012-0238-1
In-service shear check of heated cased insulatedflowlines Open?Access
文章信息
作者：Zhao Tianfeng,Duan Menglan,Jia Xu and Jiao Bintian1
作者单位：
Offshore Oil/Gas Research Center, China University of Petroleum, Beijing 102249, China;1 Offshore Oil/Gas Research Center, China University of Petroleum, Beijing 102249, China;2 CNOOC Research Institute, Beijing 100027, China;2 CNOOC Research Institute, Beijing 100027, China
投稿时间：2011-10-10
引用方式：Zhao, T., Duan, M., Jia, X. et al. Pet. Sci. (2012) 9: 527. https://doi.org/10.1007/s12182-012-0238-1
文章摘要
Starting friction would be induced and preserved somewhere along the seabed route of
cased insulated flowlines (CIF) when the pipe carries service loads. The axial pipe-soil interaction can
be divided into three pipe sections: the sliding section, the fixed section and the starting friction section.
Although limited to a relatively small length of the pipe, the pipe coats of the starting friction section
would suffer much higher shear force caused by thermal expansion than those of the sliding section or
the fixed section. Based on the axial equilibrium equation of this kind of insulated pipeline, we developed
a method for checking the shear force on CIF coats and their interfaces. The typical example shows
that starting friction effect should be taken into account when checking the lap shear strength of heatshrinkable
sleeves on CIF field joints.
cased insulated flowlines (CIF) when the pipe carries service loads. The axial pipe-soil interaction can
be divided into three pipe sections: the sliding section, the fixed section and the starting friction section.
Although limited to a relatively small length of the pipe, the pipe coats of the starting friction section
would suffer much higher shear force caused by thermal expansion than those of the sliding section or
the fixed section. Based on the axial equilibrium equation of this kind of insulated pipeline, we developed
a method for checking the shear force on CIF coats and their interfaces. The typical example shows
that starting friction effect should be taken into account when checking the lap shear strength of heatshrinkable
sleeves on CIF field joints.
关键词
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Cased insulated flowlines, starting friction, thermal expansion, shear failure