THE INFLUENCE OF THERMOBARIC CONDITIONS ON WELL FLUSHING EFFICIENCY

Abstract

them, a new approach to solving the technological problem of designing a mud pump rate for well flushing is proposed. The practical implementation of its solution was to combine the existing approaches into the method of energy-efficient well flushing for different rheological models of drilling fluids taking into account such factors as the mechanical velocity of drilling, the concentration of cuttings in the drilling mud, its rheological parameters depending on the well depth. A visco-plastic flushing fluid has been applied to study the process of removing cuttings from a well. Based on the developed mathematical approach, the appropriate calculations of the pumping rate have been made. The results of the analytical study helped establish that in order to achieve energy efficiency in the flushing process and to ensure a proper flushing of the cuttings from the bottomhole, the drilling muds of which are exposed to thermobaric conditions, the necessary condition is to adjust the pumping rate. The approach presented in this article helps to provide this.