In-service shear check of heated cased insulated flowlines

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.Alth...

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Bibliographic Details
Published inPetroleum science Vol. 9; no. 4; pp. 527 - 531
Main Authors Zhao, Tianfeng, Duan, Menglan, Jia, Xu, Jiao, Bintian
Format Journal Article
LanguageEnglish
Published Beijing China University of Petroleum (Beijing) 01.12.2012
Offshore Oil/Gas Research Center, China University of Petroleum, Beijing 102249, China%CNOOC Research Institute, Beijing 100027, China
Subjects
Coating
Crude oil
Earth and Environmental Science
Earth Sciences
Economics and Management
Energy Policy
Friction
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Marine
Mineral Resources
Petroleum pipelines
Pipe
Shear
Sleeves
Sliding
剪切力
服务
检查
油管线
海底管道
热套管
管土相互作用
绝缘
shear failure
Cased insulated flowlines
thermal expansion
starting friction
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Summary: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.
Bibliography:Cased insulated flowlines; starting friction; thermal expansion; shear failure
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.
11-4995/TE
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1672-5107
1995-8226
DOI:10.1007/s12182-012-0238-1