自动垂直钻井工具用涡轮发电机磁力驱动器设计

自动垂直钻井工具测试与控制功能的耗能由井下涡轮发电机提供。为了解决井下涡轮发电机适应泥浆工作环境的问题,将动密封补偿式保护技术和磁力驱动技术结合,取得了增加动密封可靠性、提高高速轴承使用寿命、改善发电机效率、避免发电机线圈和磁钢体直接被泥浆冲蚀的良好效果。该涡轮发电机的设计不仅包括发电机本身性能参数、结构参数设计,还包括磁力驱动器和动密封补偿式保护组件中的补偿弹簧等相关参数设计。给出了井下涡轮发电机磁力驱动器的设计方法,同时也对动密封补偿式保护器的弹簧设计进行了讨论。

Design of the magnetic driver in turbine generators used in automatic vertical drilling

The energy consumption of the test and control system in automatic vertical drilling tools is provided by the downhole turbine generator. In order to make downhole turbine generator adapt to mud working condition, we combined the dynamic sealing compensation protection technology with the magnetic driving technology, and achieved good results in improving the dynamic sealing reliability, increasing the service life of high speed bearings, improving generator efficiency, and avoiding the generator coil and the magnet steel from being eroded by mud. The design of this turbine generator covers not only the design of the performance and structure parameter of the generator itself, but also the related parameter design of the magnetic driver and the compensation spring, one of the dynamic sealing compensation protection components. The paper gives a design method for the magnetic driver of downhole turbine generator, and discusses the spring design of the dynamic sealing compensation protector.