Análise do comportamento dinâmico de uma coluna de haste de bombeio mecânico de poços de petróleo

Abstract

It was observed that the sucker rods pumping, mechanical components used in the method of artificial lift by mechanical pump of petroleum are subject to great cyclical efforts and they have suffered failures that have led to successive ruptures causing physical damage to the production company. Determining and analyzing these causes are important to avoid future rod breaks. One way is to use an analogy with the dynamic of multiple pendulums to model the transverse displacements in the system and find the rods most susceptible to failure. The transverse displacements can cause beating/shocks of the rod string with the inner wall of the production tubing, these beats can cause damage to the rod column, damaging the system operation, and consequently the production stops and increase intervention in the wells. In this dissertation, looking through an experiment (analogy with multiple pendulums) where a bicycle chain is used to simulate the dynamics of the sucker rod’s string through the vertical movement of the pump, obtaining the transverse displacements to compare numerical analysis. Numerical and experimental results shows the rod’s region in relation to the well’s length with majors displacements. In the work two simulations are carried out, one of a sucker rod’s string in petroleum well and another one experiment with bicycle chain and shows that is possible simulate dynamical behavior of a sucker rod pumped vertical petroleum wells.