An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap

Xiao Li; Xiaoli Jiang; Hans Hopman

doi:10.1115/OMAE2019-95642

An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

2 Citations (Scopus)

17 Downloads (Pure)

Abstract

A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects of initial imperfections, e.g., ovality of the carcass, and radial gap between the carcass/liner and pressure armor. These two imperfections may cause a significant reduction in the collapse strength of flexible risers under the flooded annulus condition. However, there are few analytical models available in the public literature that could take those factors into account. In this paper, an analytical approach is presented to predict the critical collapse pressure of the flexible risers with initial imperfections. The analytical results were compared with the numerical simulation, which showed reasonably good agreement.

Original language	English
Title of host publication	Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019)
Subtitle of host publication	Volume 5A: Pipelines, Risers, and Subsea Systems
Place of Publication	New York, NY, USA
Publisher	ASME
Number of pages	8
ISBN (Print)	978-0-7918-5880-6
DOIs	https://doi.org/10.1115/OMAE2019-95642
Publication status	Published - 2019
Event	ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom Duration: 9 Jun 2019 → 14 Jun 2019

Conference

Conference	ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
Country/Territory	United Kingdom
City	Glasgow
Period	9/06/19 → 14/06/19

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

collapse strength
flexible risers
initial ovality
radial gap

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1115/OMAE2019-95642

_Final_paper_OMAE2019_95642Final published version, 689 KB

Cite this

Li, X., Jiang, X., & Hopman, H. (2019). An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap. In Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019): Volume 5A: Pipelines, Risers, and Subsea Systems Article OMAE2019-95642 ASME. https://doi.org/10.1115/OMAE2019-95642

@inproceedings{6f93ffa9489a40529fee09c34a2f2d95,

title = "An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap",

abstract = "A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects of initial imperfections, e.g., ovality of the carcass, and radial gap between the carcass/liner and pressure armor. These two imperfections may cause a significant reduction in the collapse strength of flexible risers under the flooded annulus condition. However, there are few analytical models available in the public literature that could take those factors into account. In this paper, an analytical approach is presented to predict the critical collapse pressure of the flexible risers with initial imperfections. The analytical results were compared with the numerical simulation, which showed reasonably good agreement.",

keywords = "collapse strength, flexible risers, initial ovality, radial gap",

author = "Xiao Li and Xiaoli Jiang and Hans Hopman",

note = "Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 ; Conference date: 09-06-2019 Through 14-06-2019",

year = "2019",

doi = "10.1115/OMAE2019-95642",

language = "English",

isbn = "978-0-7918-5880-6",

booktitle = "Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019)",

publisher = "ASME",

address = "United States",

}

Li, X, Jiang, X & Hopman, H 2019, An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap. in Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019): Volume 5A: Pipelines, Risers, and Subsea Systems., OMAE2019-95642, ASME, New York, NY, USA, ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019, Glasgow, United Kingdom, 9/06/19. https://doi.org/10.1115/OMAE2019-95642

An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap. / Li, Xiao; Jiang, Xiaoli ; Hopman, Hans.
Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019): Volume 5A: Pipelines, Risers, and Subsea Systems. New York, NY, USA: ASME, 2019. OMAE2019-95642.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap

AU - Li, Xiao

AU - Jiang, Xiaoli

AU - Hopman, Hans

N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2019

Y1 - 2019

N2 - A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects of initial imperfections, e.g., ovality of the carcass, and radial gap between the carcass/liner and pressure armor. These two imperfections may cause a significant reduction in the collapse strength of flexible risers under the flooded annulus condition. However, there are few analytical models available in the public literature that could take those factors into account. In this paper, an analytical approach is presented to predict the critical collapse pressure of the flexible risers with initial imperfections. The analytical results were compared with the numerical simulation, which showed reasonably good agreement.

AB - A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects of initial imperfections, e.g., ovality of the carcass, and radial gap between the carcass/liner and pressure armor. These two imperfections may cause a significant reduction in the collapse strength of flexible risers under the flooded annulus condition. However, there are few analytical models available in the public literature that could take those factors into account. In this paper, an analytical approach is presented to predict the critical collapse pressure of the flexible risers with initial imperfections. The analytical results were compared with the numerical simulation, which showed reasonably good agreement.

KW - collapse strength

KW - flexible risers

KW - initial ovality

KW - radial gap

UR - http://www.scopus.com/inward/record.url?scp=85075834695&partnerID=8YFLogxK

U2 - 10.1115/OMAE2019-95642

DO - 10.1115/OMAE2019-95642

M3 - Conference contribution

SN - 978-0-7918-5880-6

BT - Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019)

PB - ASME

CY - New York, NY, USA

T2 - ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019

Y2 - 9 June 2019 through 14 June 2019

ER -

Li X, Jiang X , Hopman H. An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap. In Proceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019): Volume 5A: Pipelines, Risers, and Subsea Systems. New York, NY, USA: ASME. 2019. OMAE2019-95642 doi: 10.1115/OMAE2019-95642

An analytical approach for predicting the collapse pressure of the flexible risers withinitial ovalization and gap

Abstract

Conference

Bibliographical note

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this