Análise de descida de tubos de revestimento de poços de petróleo considerando um modelo numérico de contato

Abstract

This work presents a computational methodology for simulation of internal contact between elastic pipes, which is denominated pipe in pipe, the identification of the contact regions is performed using the bounding box technic. Based on the technical and scientific literature, technical rules and the state of art elastic, this work describes the background and principal concepts of the drilling risers and special operations for deploy well casing joint inside the drilling riser. In order to establish the structural safety and reliability of the casing running operations, dynamical simulations of the system are performed using numerical method including the pipe in pipe contact effects, between the drilling riser and casing joints. A fully coupled dynamic drilling rig+riser+soil describes more realistically the structural behavior of the system and this methodology is adopted in this research. A contact stiffness is defined in order to compute the contact reaction forces, between the pipes, the energy dissipation due to the contact process is represented using the Rayleigh methodology. The models case studies are presented; the dynamical simulations are performed using the SITUA/PROSIM numerical engine. The results obtained here show clearly the contact regions between the pipes. Moreover, the computation of internal and reaction forces were estimated.