摘要：In this paper,an experimental device is set up for the hydraulic system of the static offset push-bit rotary steerable drilling tool,and a preferred scheme for the hydraulic system of the static offset push-bit rotary steerable drilling tool is proposed by the experimental method.The bypass throttling speed control circuit has been tested at different temperatures and different throttle groups.Based on the lab test,it is found that the pressure control system,including the bypass speed control circuit and the brushless DC motor,has good rigidity The results shows that the rigidity of the system increases with the fluid resistance,and the displacement and working pressure is closer to linear; the power consumption is less mainly depends on the relationship between the working pressure and the temperature of the hydraulic oil.Hydraulic system wants to obtain the good rigidity at high temperature,the requirements for motors and hydraulic pumps performance are higher. The control of hydraulic systems can be achieved by precise efficient control of DC motors,and its characteristics are more suitable for the control characteristics of hydraulic execution systems of rotary drilling tools,which need to save energy as much as possible.This system could effectively improve the ROP,and has important environmental protection significance.
