Abstract: The outer covering of original Digitran Company’s simulator is used in developing the first drilling engineering training simulator in SWPI. This paper briefly introduces the mathematical models and main control programs about the simulator. The mathematical models include: major mathematical models, operation models about the effect operating elements & devices and operating process models. The major mathematical models used in the simulator are related to drilling engineering, and are recognized at home and abroad. The operation models demanded in operating elements and devices. The operating technique process models are built in order to control drilling technique process. The models include the mandatory models and the non-mandatory models of operating technique process. Main control programs include: drilling feed, trip up & down operations and well control. This simulator is mainly used for training driller, drilling technician and drilling engineer.

Key words: Drilling, Training, Simulator, Mathematical model, Computer program Assisted Expert System for Mixed