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Controlling lateral buckling of subsea pipeline with sinusoidal shape pre-deformation

Controlling lateral buckling of subsea pipeline with sinusoidal shape pre-deformation
Controlling lateral buckling of subsea pipeline with sinusoidal shape pre-deformation

It is common for subsea pipelines to operate at high pressures and high temperatures (HPHT) conditions. The build-up of axial force along the pipeline due to temperature and pressure differences from as-laid conditions coupled with the influence of the seabed soil that restricts free movement of the pipeline can result in the phenomenon called ‘lateral buckling’. The excessive lateral deformation from lateral buckling may risk safe operation of the pipeline due to local axial strains that potentially could be severe enough to cause fracture failure of welds or collapse of the pipeline. Engineered buckles may be initiated reliably during operation by using special subsea structures or lay methods which are expensive. This paper introduces and exemplifies a novel method that involves continuously deforming the pipeline prior to or during installation with prescribed radius and wavelength to control lateral buckling that could be a valuable modification of the practical design of offshore pipelines. Previous published work has shown that installation of a pipeline with such continuous deformations is feasible. The results from an example pipeline case described here show that the pipeline can be installed and operated safely at elevated temperatures without the need for other expensive buckle initiation methods.

High pressure, High temperature (HPHT), Pipeline, Pipeline failure modes, Pipeline lateral buckling, Pre-deformed pipeline (PDP), Soil interaction (PSI), Subsea pipeline novel design
0029-8018
170-190
Chee, Jayden
8c2766e4-6ec5-45ea-8c9b-25b758f9aad0
Walker, Alastair
213f8012-8f78-4f29-b366-866df23e47e0
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Chee, Jayden
8c2766e4-6ec5-45ea-8c9b-25b758f9aad0
Walker, Alastair
213f8012-8f78-4f29-b366-866df23e47e0
White, David
a986033d-d26d-4419-a3f3-20dc54efce93

Chee, Jayden, Walker, Alastair and White, David (2018) Controlling lateral buckling of subsea pipeline with sinusoidal shape pre-deformation. Ocean Engineering, 151, 170-190. (doi:10.1016/j.oceaneng.2018.01.024).

Record type: Article

Abstract

It is common for subsea pipelines to operate at high pressures and high temperatures (HPHT) conditions. The build-up of axial force along the pipeline due to temperature and pressure differences from as-laid conditions coupled with the influence of the seabed soil that restricts free movement of the pipeline can result in the phenomenon called ‘lateral buckling’. The excessive lateral deformation from lateral buckling may risk safe operation of the pipeline due to local axial strains that potentially could be severe enough to cause fracture failure of welds or collapse of the pipeline. Engineered buckles may be initiated reliably during operation by using special subsea structures or lay methods which are expensive. This paper introduces and exemplifies a novel method that involves continuously deforming the pipeline prior to or during installation with prescribed radius and wavelength to control lateral buckling that could be a valuable modification of the practical design of offshore pipelines. Previous published work has shown that installation of a pipeline with such continuous deformations is feasible. The results from an example pipeline case described here show that the pipeline can be installed and operated safely at elevated temperatures without the need for other expensive buckle initiation methods.

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Chee et al 2018 AM - Accepted Manuscript
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More information

Accepted/In Press date: 5 January 2018
e-pub ahead of print date: 13 January 2018
Published date: 1 March 2018
Keywords: High pressure, High temperature (HPHT), Pipeline, Pipeline failure modes, Pipeline lateral buckling, Pre-deformed pipeline (PDP), Soil interaction (PSI), Subsea pipeline novel design

Identifiers

Local EPrints ID: 419503
URI: http://eprints.soton.ac.uk/id/eprint/419503
ISSN: 0029-8018
PURE UUID: de56e213-c98f-434b-a737-a766d031b01c
ORCID for David White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 13 Apr 2018 16:30
Last modified: 18 Feb 2021 17:32

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