... of the survey raw data, pipe-soil interaction update, free-span verification, and confirmation of the lateral buckling initiation strategy reliability. offshore pipeline sleeper displacement engineering floating production systems det norske veritas plet step 5 robustness flowline step...

... at crossing locations and critical free spans on seabed are also discussed and optimised solutions are provided. KEY WORDS: Pipeline crossing, Optimisation, Modal analysis, Fatigue, Free span, Vortex Induced Vibration, Upheaval buckling. INTRODUCTION Pipeline crossing is an integral part of field developments...

... buoyancy module rc orientation span ABSTRACT This paper discusses the design and installation challenges involved in employing Residual Curvature Method (RCM) as engineered buckle triggers in a large diameter reel-laid pipeline. The description provided in this paper is for a generic case study...

... upstream oil & gas pipeline bottom roughness assessment pipeline as-laid embedment pipe vertical load penetration response embedment span route option flowline route roughness analysis assessment as-laid embedment production flowline vertical load penetration response model...

... Abstract The purpose of route roughness analysis is to give a guided idea about rectifying of the roughness seabed for installation contractor. The bottom roughness analysis is performed and considering the seabed profile to establish, the over spans locations along this segment pipeline route...

... to overcome the significant design and installation challenges, which include internal corrosion from the high product temperature and flowrate, large quantities of critical spans that require rectification, and PLET dimension and valve delivery risk for inline installation, extensive detailed engineering...

...Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25, 2021 Copyright © 2021 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-82-1; ISSN 1098-6189 Analysis of the influence of span...

... ABSTRACT Three surveys of an 8km long subsea pipeline laid on a soft clay seabed were performed using side scan sonar profiler. The free span characteristics over the field surveys were examined and compared with the conventional free span design criteria. The comparison results indicate some...

... formula west artificial island wave force elevation span physical model test Experimental Study on Wave Forces Acting on Bridge at the Junction of Island and Bridge in the Shenzhen-Zhongshan Channel West Artificial Island Ge Long-zai Liu Hai-yuan Luan Ying-ni* Chen Han-bao National Engineering...

... reservoir characterization simulation reference system upstream oil & gas monopile calculation numerical simulation relative density loading hysteresis monopile foundation initial stiffness proceedings secant stiffness stiffness foundation stiffness amplitude eigenfrequency span...

... topology behind the catenary riser is strongly influenced by the degree of bending of the catenary. Furthermore, the interference between the convex and concave parts greatly modifies the wake dynamics and correspondingly changes the characteristics of hydrodynamic force coefficients along the span...

... A Method for the Analysis of Multi-Spanning Pipelines Subjected to Currents Morten Slingsby INTECSEA Delft, The Netherlands Ping Liu INTECSEA Delft, The Netherlands Joao de Oliveira Barbosa Delft University of Technology Delft, The Netherlands ABSTRACT This paper describes a method to study multi...

... be performed on S-lay vessels, e.g. by roller or stinger adjustment during laying. Numerical calculations are presented, illustrating the benefits in terms of suppressing free spans, achieving acceptable bending moments and reducing intervention costs. piping design span installation tolerance...

... using 3D visual tools. Even with rigorous optimization, the pipeline route remains extremely rugged compared to normal flowlines. This undulation renders a large number of spans to be assessed and if deemed necessary corrected. In addition, those route undulations form vertical imperfections to trigger...

... assessment scour mechanism scour depth scour hole span pipeline free-span observation scour-induced freespan close proximity touchdown length scour process pipeline freespan freespan span length offshore pipeline survey data theoretical touchdown length integrity pipeline...

... Abstract Modal analyses are carried out for a large number of free spans using three different calculation methodologies. These include comprehensive finite element analyses in which the seabed unevenness is accounted for, a semi-analytical multi-span method based on an idealized flat seabed...

... transverse frame stiffened panel span panel part stiffener strength lateral water pressure longitudinal stiffener joint line ultimate strength in-plane compression type 3 compression deflection deformation Bending and Compressive Strength of Stiffened Panels with Crack Damage...

... Abstract Free span assessments of subsea pipelines are required to predict a pipeline free span's fatigue life under the influence of the vortex shedding phenomenon. Free span responses to vortex shedding are usually predicted by using a modal response technique. This paper gives details...

... of the system to various parameters in terms of hydrostatic stability, resonance periods, and motion amplitudes. absolute acceleration wind turbine characteristic subsea system cylinder-like shape configuration requirement wind energy heave resonance period fpso diameter heave plate span...

... fatigue life subsea pipeline natural frequency span prediction zhao stress ratio steel plate static load Fatigue of Subsea Pipelines under Combined Actions Hong-Bo Liu and Xiao-Ling Zhao Department of Civil Engineering, Monash University Melbourne, Victoria, Australian ABSTRACT Subsea pipelines...