Análisis y optimización de procesos de producción para la planta Tenaris Ecuador

Abstract

Tenaris Ecuador is dedicated to the machining of threads on pipes for the oil industry. The plant produces multiple thread profiles in different diameters, used for drilling and extraction in oil wells. One of the products, denoted as “Product B” in this work, presents constant deviations from the objectives of productivity established by the organization. The present document details the method used to find the causes and plant solutions for the recurring quality problems in the company's production. The analysis of the historical inspection data revealed that most discards were caused by deviations in the parameters of thread diameter, ovality and separation. These defects are directly related to the diameter of the pipe, and it has been determined that they are attributable to a deficiency in the grip of the piezo. Modifying the grip system resulted in the reduction of the rejection percentage, however, it is not possible to obtain a fully controlled process. For that reason, a continuous improvement method is proposed, using the statistical control of the thread parameters. As a result, a steady reduction in the percentage of rejections due to plant quality is expected.