Author(s)

Celso Kazuyuki Morooka

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

Keywords