Issues of Modeling Drilling Rigs and the Drilling Process

Among modern technical means of industrial use, an important role is given to electromechanical objects. Electromechanical objects are marked by a constant increase in complexity, which is due to such factors as the development of their structure, increasing requirements for accuracy and speed, the need to take into account various modes and the choice of effective control laws for them, the complexity of the control laws themselves, taking into account nonlinear dependencies and distribution of the parameters of the system components. To cover a wider range of practical tasks, modern controlled electromechanical objects are equipped with digital control systems, which must work out various algorithms implemented by microprograms. Saturation of electromechanical systems with built-in computer tools allows solving a complex of tasks related not only to control, but also to control, adaptation, diagnostics, joint work with other systems, and support for intelligent functions. The article is devoted to the problem of modeling the dynamics of the drill string during drilling and tripping. The issues of creating adequate mathematical and computer models of both individual elements and the entire system as a whole are considered. The use of a computer model of the drill string in the management of the drilling process will allow solving a number of important tasks: to increase the technical and economic indicators of drilling by taking into account the dynamic component in determining and maintaining the optimal weight on bit; exercise control over the process of lifting the drill string, taking into account its interaction with the flushing fluid and the walls of the well in order to reduce the time of tripping; exercise control over the supply of flushing fluid during drilling and tripping; to control the operating modes of the ground system in order to reduce energy costs.