Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NONLINEAR FINITE-ELEMENT BUCKLING ANALYSIS OF DRILL-STRINGS CONFINED IN VERTICAL WELLS
Submission Author:
Lucas Santos , RJ , Brazil
Co-Authors:
Lucas Santos, Raphael Santana Silva, Thiago Ritto
Presenter: Lucas Passos Volpi
doi://10.26678/ABCM.COBEM2019.COB2019-1096
Abstract
Tubular strings buckling has been for years an important concern on well engineering. Several analytical models have been developed and classical formulations are still used to predict this phenomenon on industrial applications. However, such equations often tend to oversimplify the real phenomenon and thus to produce results that may be distant from reality. This paper proposes a numerical model to perform buckling analysis on drill-string columns confined in vertical wells. Linear and non-linear simulations are conducted using Abaqus Finite Element Analysis (FEA) software. The effect of drilling stabilizers, fluid and pipe to pipe contact is considered to permit a better approach to the real physical phenomenon. Finally, comparison with analytical results and application to practical examples are made to demonstrate the accuracy of the proposed model.
Keywords
Buckling, Drilling, Finite Element Method, Riks Method, post-buckling
