低压高能长寿命水力振荡器研制与试验

Development and Test of Low-pressure High Energy and Long Life Hydraulic Oscillator

水力振荡器是缓解定向托压最有效的工具之一。针对传统的单头螺杆、偏心盘阀式水力振荡器难以满足深井、超深井、长水平井对低压耗、长寿命、高能效的需求等问题,研发了低压高能长寿命水力振荡器。设计了同心盘阀结构,扩大了钻井液的过流面积,降低了工具压耗;设计了7/8头螺杆和挠轴结构,保障螺杆转子稳定转动,使定子橡胶均匀受力;设计了多级活塞结构,振荡力在压力波动降低的前提下,保持不变;优化设计碟簧组、活塞密封结构、表面处理工艺,提供工具的强度、耐磨性和寿命。该水力振荡器现场试验25口井,平均机械钻速提高23.9%,工具最低压耗2.1 MPa,最长工作寿命可达312 h,使用最高温度161℃,验证了其低压高能长寿命的工作性能。可在深井、超深井、长水平井作业中推广应用。

The hydraulic oscillator is an effective tool for relieving directional pressure.It is challenging to meet the specifications for low-pressure consumption,extended operational lifespan,and high energy efficiency in the context of deep,ultra-deep,and extended horizontal wells.A low-pressure,high-energy,and long-life hydraulic oscillator was developed,and a concentric disc valve was designed to enlarge the flow area of drilling fluid and reduce the pressure loss of the tool.The multi-stage piston structure was designed with the objective of maintaining a constant oscillating force while reducing pressure fluctuations.The design of the disc spring group and piston seal structure were optimized to enhance tool strength,wear resistance,and lifespan.The hydraulic oscillator has been tested in 25 wells,demonstrating an average penetration rate increase of 23.9%,a lowest pressure loss of 2.1 MPa,a longest working life of 312 hours,and a highest temperature of 161℃.These results verify the performance of low pressure,high energy,and long life,making it suitable for use in deep wells,ultradeep wells,and long horizontal wells.