The new developments in the oil and gas industry generate an increase demand of reliable threaded connections for the tubular goods. The reliability of such connections is based on the tribological properties of the thread compound used as a lubricant and sealant. A more advanced investigation of friction between the threaded components of tubular goods for the drilling and production operations is requested in order to better describe its behavior. In this context an automated testing facility should be able to apply controlled efforts on the threaded connections and to estimate the influences on the friction coefficient.
This paper describes the development and implementation of a simulator used for automatic control of all the necessary parameters of a dedicated make-up machine. The concept was simulated using MathLab and shows very good results. The focus of the investigations was the dynamic behavior of the system, the interaction of two control loops, and its response to external disturbances.