Análise do comportamento do conjunto broca-alargador durante a técnica reaming while drilling (RWD)

Abstract

Due to the constant need for technological advances in the oil industry in order to meet the demand for exploration in increasingly remote locations, it is necessary to develop research aimed at understanding or improving activities carried out in the field. During the process of drilling oil wells in ultra-deep waters, it is common for axial, torsional and lateral vibration phenomena to occur due to the great depth of the wells in these regions, these problems can generate premature wear of downhole equipment, damage to the casing and the drill string and, consequently, an increase in the cost of the drilling project. Thus, it is common to observe the use of the Reaming While Drilling (RWD) technique as a method to mitigate this problem, through the use of a smaller diameter drill bit and a reamer of the desired diameter coupled to a single BHA. Therefore, for the present study, a mathematical model is elaborated, implemented in MATLAB, with the objective of returning the values of loads and torques in the drill bit and in the reamer, ROP and duration necessary to drill a rock layer through of the RWD technique. Three different scenarios are defined and these are simulated using the developed model, so that their results are exposed through graphs and tables that allow the analysis of the influence of input data on the responses obtained through the aforementioned output variables.