Ｄ、限位器D， limiting device限位器为一个底部带限位板和流通通道的短节，接在定子的尾部，其作用是施工作业时给转子限位以防止下入过头而失去作用和杆柱脱落时防止杆柱掉入井底。The limiting device is a short section with bottom limit plate and distribution channel， which is connected to the tail of the stator. Its function is to limit the rotor to the rotor during ctruction1， so as to prevent it from falling into the overhead and lose its function and prevent the rod from falling into the bottom when the rod string falls off.
管柱脱落是自由式管柱结构经常发生的一种现象，这是由于正常运转时转子旋转对定子产生的摩擦扭矩方向实际上是定子及油管的连接螺纹的卸扣方向，如果摩擦力矩大于油管扣的上扣扭矩，油管就脱扣。当尾管很重时，还会出现螺纹掳扣。当管柱脱落时，通过作业重新连接好就能恢复生产。如果未发生螺纹掳扣，可以采取对扣方式打捞，如果发生掳扣，必须下打捞工具进行打捞。Column shedding is a common phenomenon of free tube structure， which is due to the direction of rotation of the friction torque generated by the stator rotor during normal operation is actually a stator and tubing connection1 screw shackle direction， if the friction torque is greater than the pipe le on torque， oil pipe tripping. When the tail pipe is very heavy， there will also be a thread caption. When the pipe column falls off，莫诺转子， the production can be restored by reconnecting the work. If the le is not threaded， it can be salvaged by the way of the le. If the le occurs， the fishing tool must be salvaged.
武汉螺耐斯-莫诺转子由武汉螺耐斯环保设备有限公司提供。武汉螺耐斯环保设备有限公司坚持“以人为本”的企业理念，拥有一支高素质的员工队伍，力求提供更好的产品和服务回馈社会，并欢迎广大新老客户光临惠顾，真诚合作、共创美好未来。螺耐斯——您可信赖的朋友，公司地址：湖北省武汉市蔡甸区奓山街工业园，联系人：尤经理。
