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|Type:||Artigo de evento|
|Title:||Drill Column-riser-wellbore Contact Forces In A Floating Drilling Rig In Waves|
|Author:||Morooka Celso Kazuyuki|
Bueno Ricardo Cassio Soares
|Abstract:||When the drill column works rotating inside a well and riser during an offshore drilling, contacts between the drill column and riser or, drill column and wellbore is undesirable. Specially, in deepwater the magnification of those forces which arise from the contact, they could provoke damage into the drilling equipment such as BOP, riser and wellbore. The correct evaluation of damage possibilities is very important in order to estimate the safety of the drilling operation. Furthermore, it will be very useful for accurate planning of drilling operations. In the present paper, behavior in waves of the floating drilling rig is evaluated, dynamics and displacements of the riser is considered and, finally contact forces between drill column-riser and drill column-wellbore is calculated. The methodology to calculate the contact forces using finite elements for modeling the drill column is here described. Results for a deepwater drilling case is presented and a interesting result for the contact force dynamics is shown. Finally, the practical application of the methodology here proposed has shown good results and it make possible the overall analysis of the floating rig, drill column and wellbore environments. It is a very important tool for the safety assessment of the drilling operations.|
|Editor:||Computational Mechanics Publ, Ashurst, United Kingdom|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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