从单牙轮钻头几何结构出发， 利用仿真技术， 建立了钻头运动模型、牙齿几何模型、井底模型和岩石与牙齿作用力模型等。在这些模型的基础上， 编制单牙轮钻头钻进过程仿真程序， 在计算机上模拟钻头破岩过程， 揭示了钻头与岩石互作用的大量细节， 并获得牙齿载荷和机械钻速等许多重要信息。仿真结果与台架试验结果很接近， 从而验证了仿真程序的正确性。采用该仿真程序可对不同钻井条件下不同结构单牙轮钻头的性能作出比较和判定， 也可预计尚未制成钻头的钻进能力。 Based on the single roller cone geometry, the simulation model was used to establish the bit motion model, the tooth geometry model, the bottomhole model and the rock and tooth force model. Based on these models, a simulation program of single-cone bit drilling process is developed to simulate the rock breaking process on a computer, revealing a great deal of detail about the interaction between the bit and the rock and obtaining many important information such as tooth load and ROP . Simulation results and bench test results are very close to verify the correctness of the simulation program. The simulation program can be used to compare and judge the performance of different structure single-cone drill bits under different drilling conditions, and the drilling capability of a drill bit that has not yet been made is also estimated.