提出了一种新型的石油钻井用水力振荡器，可有效降低管柱摩阻，提高钻井效率．该水力振荡器采用涡轮驱动，并使用双偏心动定阀作为压力脉冲发生机构．通过建立双偏心动定阀的运动特性方程，结合实际工况得出阀盘的最优尺寸．通过选定阀型的水力振荡器性能测试实验，得出在模拟钻压为30 kN ，流量为28 L／s ，工作介质为清水时的振动冲击力约为15859 N ，振动位移约为4.1 mm ，振动频率约为11.4 Hz ．该分析与实验结果对水力振荡器的设计与应用具有指导意义．%A new type of hydraulic oscillator for oil drilling is presented ,w hich can effectively re‐duce the frictional resistance and increase the drilling efficiency . The hydraulic oscillator was driven by a turbine ,and double eccentric valve was used as the pressure pulse generating mecha‐nism .By establishing the motion characteristic equation of the double eccentric valve ,the optimal size of the valve disc was obtained based on the actual working conditions .The performance test experiment of the hydraulic oscillator with selected valve was carried out ,the experimental re‐sults showed that the vibration impact force of the hydraulic oscillator was about 15 859 N ,the vibration displacement was about 4.1 mm ,and the vibration frequency was about 11.4 Hz when the drilling pressure was 30 kN ,the flow rate was 28 L/s ,and the working medium was water . The analysis and experimental results have guiding significance for the design and application of the hydraulic oscillator .
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