In the view of dynamics, this article discusses the transient pattern of the dynamic performance of the turbodrill witha decelertor undr the condition of increasing of deeressing load .

• 从动力学角度，导出了带减速器涡轮钻具在突加或突减载荷条件下的动态特性（动态力矩和动态轴向水力载荷）瞬变规律。