NDLI: Limit States for Deepwater Flowlines and Risers: Review of the Research Activities at the Submarine Technology Laboratory/COPPE

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Estefen, S. F. Netto, T. A. Pasqualino, I. P.
Copyright Year	2003
Abstract	Research activities related to the limit states of flowlines and risers conducted at the Submarine Technology Laboratory / COPPE in cooperation with PETROBRAS are presented. The motivation for most of the research programs is associated with deepwater challenges arising from the rigid pipe installations at Campos Basin. Initially ultimate strength of intact pipes are investigated together with aspects related to residual strength, buckling propagation and buckle arrestors. Based on the experimental results numerical models have been correlated in order to be used to generate results for full scale steel pipes. Ultimate strength curves have been then produced as well as the analytical equation representative of these curves. Experimental tests of buckling propagation for small and large scale pipes have also been performed to obtain the bias factor for different equations proposed in the literature. Based on this study an equation for propagation pressure has been recommended. In addition, ring and cylinder buckle arrestors have been tested in order to propose an expression relating crossing over pressure with the arrestor geometries. An overview of the studies aiming at establishing the influence of the reeling method of installation on the failure modes of flowlines and steel catenary risers is presented. It is emphasized the influence of cross-section ovality and weld defect amplification due to plastic bending on collapse pressure and fatigue life, respectively. Finally, the development of a new concept of sandwich pipe for ultra deepwater, combining structural resistance and thermal insulation is discussed.
Sponsorship	Ocean, Offshore, and Arctic Engineering Division
Starting Page	801
Ending Page	807
Page Count	7
File Format	PDF
ISBN	0791836827
DOI	10.1115/OMAE2003-37421
e-ISBN	079183672X
Volume Number	Volume 2: Safety and Reliability; Pipeline Technology
Conference Proceedings	ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2003-06-08
Publisher Place	Cancun, Mexico
Access Restriction	Subscribed
Subject Keyword	Collapse Fatigue life Computer simulation Thermal insulation Steel Pressure Underwater vehicles Tensile strength Pipeline risers Steel catenary risers Risers (casting) Pipes Buckling Cylinders Failure mechanisms
Content Type	Text
Resource Type	Article

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