Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Fatigue analysis in a drillstring under torsional vibrations
Submission Author:
Sandro Valente , RJ
Co-Authors:
Sandro Valente, Thiago Ritto, DANIEL CASTELLO
Presenter: Sandro Valente
doi://10.26678/ABCM.DINAME2023.DIN2023-0096
Abstract
In oil exploration and production, drilling is one of the most important processes. Undesirable vibrations, intrinsic to the process, can lead to fatigue failure, resulting in loss of efficiency due to downtime and, consequently, loss of productivity and high costs. In this work we present an analysis of the fatigue life of a drillstring subject to torsional vibrations and the influence of operating conditions on the occurrence of Stick-Slip. The mathematical model that describes this movement is presented, the stresses are calculated to determine the fatigue life. The results are presented indicating that the weight on the bit has a great influence on the number of cycles in relation to the angular velocity imposed during the operation.
Keywords
Dill String Dynamics, Torcional Vibration, Bit-Rock Interation, fatigue, stick-slip
