The BHA an alvsisprogram thus developed can be run on a micro-computer to compute rapidly BHA deflections,tilt an-gles and internal forces including the bit behavior.

• 该程序可以在普通微机上运行，能迅速模拟计算底部钻具组合任一点的挠度、转角和内力，同时求得钻头对地层的机械作用力和偏转角。