Abstract: For realizing fully rotary steering drilling in modulated drilling system,there should be a stabilized platform in the rotary steering drilling tool to regulate and maintain the angle of tool surface.A prototype of alignment-navigated stabilized platform was designed on the basis of the dual closed loop cascade systems for controlling angular velocity and position.Algorithm and control parameters for the platform were adjusted by the functional test of both the motor powered gear wheel driving and hydro-power driving with full velocity of water flow.When the generator rotate speed was from 500r/min to 800r/min and the rotate speed of lower valve plate was 60 r/min and frictional torque from 0.8 N,m to 7.5 N·m,the system step response time was about three seconds.Reliability and possibility of the system and control method were experimentally proved.

Key words: drilling system, rotary steering drilling tool, navigational control system, stabilized platform, functional test

摘要： 为了实现在全旋转状态下的钻井导向控制,在调制式旋转导向钻井工具内设置了一个可以自动调整和保持工具面角度的稳定平台。设计了基于角速度和角位置串级控制的惯导稳定平台功能的试验样机。通过以电动机为动力的齿轮驱动和全流量清水涡轮驱动的功能试验,对稳定平台的算法和控制参数进行了调试。在发电机转速为500～800r/min、下盘阀转速约为60r/min和摩擦扭矩为0.8～7.5N·m的工作条件下,系统阶跃响应调整时间约为3s,试验结果证明了系统设计和控制方案的可行性和有效性。

关键词: 钻井系统, 旋转导向钻井工具, 导向控制系统, 稳定平台, 功能试验