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Proceedings Papers

Proposal for Cyclic Riser Load Methodology Using High-Resolution Current Data

Lasse Moldestad, Lorents Reinås, Stian Sætre, Øistein Johnsen
Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A036, June 5–10, 2022
Paper No: OMAE2022-81078
DOI: https://doi.org/10.1115/OMAE2022-81078
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Topics: Pipeline risers, Resolution (Optics), Risers (Casting), Stress
Proceedings Papers

A Risk-Based Approach to Determine Mobile Offshore Drilling Unit Disconnect Criteria

Stian Garlid, Torfinn Hørte, Lorents Reinås
Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A047, June 5–10, 2022
Paper No: OMAE2022-81122
DOI: https://doi.org/10.1115/OMAE2022-81122
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Topics: Mobile offshore drilling units, Risk, Vessels, Drilling, Dynamic response, Event history analysis, Ocean engineering, Probability, Water
Proceedings Papers

Rationale for NORSOK U-001 5th Edition Revision of Static and Cyclic Subsea Wellhead Loads

Harald Holden, Anthony Muff, Lorents Reinås
Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A038, June 5–10, 2022
Paper No: OMAE2022-81380
DOI: https://doi.org/10.1115/OMAE2022-81380
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Topics: Ocean engineering, Stress
Proceedings Papers

Use of DNVGL-RP-C203 for Determining the Fatigue Capacity of Connectors

Anthony Muff, Anders Wormsen, Torfinn Hørte, Arne Fjeldstad, Per Osen, Finn Kirkemo, Kenneth A. Macdonald, Lorents Reinås
Proc. ASME. OMAE2021, Volume 2: Structures, Safety, and Reliability, V002T02A010, June 21–30, 2021
Paper No: OMAE2021-62880
DOI: https://doi.org/10.1115/OMAE2021-62880
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Topics: Fatigue, Fatigue testing, Finite element analysis
Proceedings Papers

Fatigue Life Extension Procedure for Subsea Wells Based on Pressure Testing

Arne Fjeldstad, Torfinn Hørte, Gudfinnur Sigurdsson, Anders Wormsen, Espen Berg, Kenneth Alasdair Macdonald, Lorents Reinås
Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A045, June 21–30, 2021
Paper No: OMAE2021-63003
DOI: https://doi.org/10.1115/OMAE2021-63003
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Topics: Design, Fatigue, Fatigue life, Ocean engineering, Pressure, Pressure testing, Probability, Wells
Proceedings Papers

Barrier Analysis of Emergency Disconnect on DP Mobile Offshore Drilling Units

Haibo Chen, Tommy Bauge, Lorents Reinås, Paul Landeråen
Proc. ASME. OMAE2020, Volume 2A: Structures, Safety, and Reliability, V02AT02A075, August 3–7, 2020
Paper No: OMAE2020-19184
DOI: https://doi.org/10.1115/OMAE2020-19184
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Topics: Emergencies, Mobile offshore drilling units
Proceedings Papers

Structural Reliability Analysis Method for Assessing the Fatigue Capacity of Subsea Wellhead Connectors

Torfinn Hørte, Lorents Reinås, Anders Wormsen, Andreas Aardal, Per Gustafsson
Proc. ASME. OMAE2020, Volume 2B: Structures, Safety, and Reliability, V02BT02A035, August 3–7, 2020
Paper No: OMAE2020-18498
DOI: https://doi.org/10.1115/OMAE2020-18498
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Topics: Event history analysis, Fatigue, Ocean engineering
Proceedings Papers

Design Considerations of a Subsea Shuttle Tanker System for Liquid Carbon Dioxide Transportation

Yihan Xing, Muk Chen Ong, Tor Hemmingsen, Kjell Einar Ellingsen, Lorents Reinås
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A018, August 3–7, 2020
Paper No: OMAE2020-18070
DOI: https://doi.org/10.1115/OMAE2020-18070
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Topics: Carbon dioxide, Design, Ocean engineering, Pipeline risers, Risers (Casting), Tankers, Transportation systems
Journal Articles

Design Considerations of a Subsea Shuttle Tanker System for Liquid Carbon Dioxide Transportation

Yihan Xing, Muk Chen Ong, Tor Hemmingsen, Kjell Einar Ellingsen, Lorents Reinås
Journal: Journal of Offshore Mechanics and Arctic Engineering
Article Type: Design Innovation Paper
J. Offshore Mech. Arct. Eng. August 2021, 143(4): 045001.
Paper No: OMAE-20-1032
DOI: https://doi.org/10.1115/1.4048926
Published Online: November 25, 2020
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Topics: Carbon dioxide, Collapse, Design, Hull, Ocean engineering, Pressure, Weight (Mass), Water
Proceedings Papers

Wellhead Fatigue: Benefits of Structural Reliability Analysis Applied to Groups of Wells

Torfinn Hørte, Michael Macke, Andreas Buvarp Aardal, Lorents Reinås, Pål Bjønnes, Erik Kristian Frimanslund
Proc. ASME. OMAE2019, Volume 3: Structures, Safety, and Reliability, V003T02A103, June 9–14, 2019
Paper No: OMAE2019-96214
DOI: https://doi.org/10.1115/OMAE2019-96214
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Topics: Event history analysis, Fatigue, Wells
Proceedings Papers

Analysis Approach for Estimating Wellhead Fatigue

Kristoffer H. Aronsen, Sergey Kuzmichev, Guttorm Grytøyr, Kathrine Gregersen, Finn Kirkemo, Lorents Reinås
Proc. ASME. OMAE2018, Volume 3: Structures, Safety, and Reliability, V003T02A092, June 17–22, 2018
Paper No: OMAE2018-77214
DOI: https://doi.org/10.1115/OMAE2018-77214
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Topics: Fatigue, Fatigue analysis, Stress, Waves, Cements (Adhesives), Soil, Uncertainty, Springs, Boundary-value problems, Damage
Proceedings Papers

Wellhead Fatigue: Effect of Directional and Annual Variation in Weather for a Sequence of Drilling Operations

Torfinn Hørte, Guttorm Grytøyr, Massimiliano Russo, Marcus Hofstad, Lorents Reinås
Proc. ASME. OMAE2015, Volume 1: Offshore Technology; Offshore Geotechnics, V001T01A052, May 31–June 5, 2015
Paper No: OMAE2015-41944
DOI: https://doi.org/10.1115/OMAE2015-41944
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Topics: Drilling, Fatigue, Waves, Fatigue damage, Uncertainty, Design, Seas, Statistics, Drilling rigs, Event history analysis
Proceedings Papers

Wellhead Fatigue, Effect of Uncertainty in Directional Variation and Environmental Conditions for Operations of Short Duration

Torfinn Hørte, Guttorm Grytøyr, Massimiliano Russo, Marcus Hofstad, Lorents Reinås
Proc. ASME. OMAE2014, Volume 1B: Offshore Technology, V01BT01A040, June 8–13, 2014
Paper No: OMAE2014-24482
DOI: https://doi.org/10.1115/OMAE2014-24482
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Topics: Fatigue, Uncertainty, Fatigue analysis, Fatigue life, Statistics, Electromagnetic scattering, Waves, Drilling, Seas, Wells
Proceedings Papers

Benefit of Measurements and Structural Reliability Analysis for Wellhead Fatigue

Torfinn Hørte, Massimiliano Russo, Michael Macke, Lorents Reinås
Proc. ASME. OMAE2013, Volume 1: Offshore Technology, V001T01A050, June 9–14, 2013
Paper No: OMAE2013-10932
DOI: https://doi.org/10.1115/OMAE2013-10932
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Topics: Event history analysis, Fatigue, Uncertainty, Probability, Failure, Fatigue life, Life extension, Ocean engineering, Offshore structures, Annulus
Proceedings Papers

Wellhead Fatigue Analysis Method: Benefits of a Structural Reliability Analysis Approach

Torfinn Hørte, Lorents Reinås, Jan Mathisen
Proc. ASME. OMAE2012, Volume 1: Offshore Technology, 113-124, July 1–6, 2012
Paper No: OMAE2012-83141
DOI: https://doi.org/10.1115/OMAE2012-83141
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Topics: Event history analysis, Fatigue analysis, Stress, Failure, Probability, Uncertainty, Life extension, Ocean engineering, Offshore structures, Reliability
Proceedings Papers

Wellhead Fatigue Analysis Method: The Effect of Variation of Lower Boundary Conditions in Global Riser Load Analysis

Lorents Reinås, Massimiliano Russo, Guttorm Grytøyr
Proc. ASME. OMAE2012, Volume 1: Offshore Technology, 283-295, July 1–6, 2012
Paper No: OMAE2012-83314
DOI: https://doi.org/10.1115/OMAE2012-83314
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Topics: Boundary-value problems, Fatigue analysis, Pipeline risers, Risers (Casting), Stress, Fatigue, Modeling, Stiffness, Cycles, North Sea
Proceedings Papers

The Effect of a Fatigue Failure on the Wellhead Ultimate Load Capacity

Lorents Reinås, Morten Sæther, Bernt Sigve Aadnøy
Proc. ASME. OMAE2012, Volume 1: Offshore Technology, 307-314, July 1–6, 2012
Paper No: OMAE2012-83325
DOI: https://doi.org/10.1115/OMAE2012-83325
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Topics: Fatigue failure, Stress, Fatigue, Fracture (Materials), Fracture (Process), String, Ocean engineering, Bearings, North Sea, Structural elements (Construction)
Proceedings Papers

Fatigue Assessment of Subsea Wells for Future and Historical Operations Based on Measured Riser Loads

Massimiliano Russo, Harald Holden, Lorents Reinås, Morten Sæther
Proc. ASME. OMAE2012, Volume 1: Offshore Technology, 139-150, July 1–6, 2012
Paper No: OMAE2012-83162
DOI: https://doi.org/10.1115/OMAE2012-83162
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Topics: Fatigue, Ocean engineering, Pipeline risers, Stress, Wells, Fatigue damage, Cycles, North Sea, Time series, Corrective actions
Proceedings Papers

Wellhead Fatigue Analysis Method: A New Boundary Condition Modelling of Lateral Cement Support in Local Wellhead Models

Lorents Reinås, Morten Sæther, Johan Svensson
Proc. ASME. OMAE2012, Volume 1: Offshore Technology, 47-57, July 1–6, 2012
Paper No: OMAE2012-83049
DOI: https://doi.org/10.1115/OMAE2012-83049
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Topics: Boundary-value problems, Cements (Adhesives), Fatigue analysis, Modeling, Ocean engineering, Fatigue, Finite element methods, Finite element model, Pipeline risers, Stress