Abstract: In this paper, the system simulation techniques are applied to the drilling hydraulic circulating and penetrating system with reciprocation pumps as the kernel. Taking the system as an example, we discuss the modeling method of complex engineering system and developing method of the simulator based on mixed models. The simulating exprimental results of the simulator coincide with the actual experimental results of objective system under the same conditions, thus proving the method and the results to be right.

Key words: Reciprocating pump, Circulating system, Model design, System simulation