Abstract: It is dangerous to meet shallow gas during deep water drilling. It is an effective method to handle the problems caused by shallow flows with Dynamic Kill Drilling（DKD）method in a safe and successful offshore drilling operation. Basic fundamental, characteristic and key facilities of DKD are introduced. Based on the process of DKD and theoretical analysis, the computation method of hydraulic parameters are obtained that deal with kill fluid density, discharge rate, mixing ratio, total volume of mud, pump pressure, and pump efficiency et al. The results indicate that the key factor of bottomhole pressure is mud density, and pilot hole is important to control shallow flows without too large of mud flow rate.