| Autor: |
Amr Mohamed Azouz, Mohamed Yehia, Mahmoud Abdel Hakim |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Day 3 Wed, November 12, 2014. |
| DOI: |
10.2118/171987-ms |
| Popis: |
Pipeline walking is a phenomenon known to affect ‘short’ high temperature subsea pipelines subject to cyclic loading such as startup / shutdown cycles. Pipeline walking is a form of ratcheting response in the pipeline axial displacement under certain conditions such as seabed slopes and thermal gradients. Unfortunately, the industry's understanding of pipeline walking is still developing due to the complexity of the walking mechanism as well as limited availability of operational verification for the design predictions. Pipeline walking is in many cases overlooked for ‘long’ HPHT pipelines which are typically susceptible to global buckling. Hence, for such lines the global buckling design is carried out without due consideration of pipeline walking. However, global buckles effectively divide a ‘long’ pipeline into a number of ‘short’ pipeline segments which may be susceptible to walking. The interaction between pipeline walking and global buckling may affect the long term development of the global buckles as well as the pipeline end expansions. Therefore, ADMA-OPCO has initiated a detailed assessment of global buckling and pipeline walking interaction on a recent subsea pipelines project. The assessment showed that the interaction between the two phenomena can have a significant effect on the pipeline response in terms of the expansion behavior and buckle growth. The key findings of the assessment are presented along with an overview of the design process and the typical mitigation techniques to be considered for similar subsea pipeline projects. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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