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***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 he***y, there will also be a thread caption. When the pipe column falls off, 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.
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.
单螺杆泵的使用方法:
单螺杆泵在发达***已广泛使用,德国称“偏心转子泵”。由于其单螺杆泵在发达***已广泛使用,德国称“偏心转子泵”。由于其优良的性能,在国内的应用范围也在迅速扩大。它的特点是对介质的适应性强、流量平稳、压力脉动小、自吸能力高,这是其它任何泵种所不能替代的。
单螺杆泵使用方法,螺杆泵使用注意事项:
1、启动螺杆泵前还得必须先确定螺杆泵的运转方向,单螺杆泵不能反转。
2、螺杆泵严禁在泵腔无液体的情况下空运转,必须在启动前由泵进口把液体注入泵体后再启动螺杆泵,以免空转磨损螺杆泵定子。

由于吸液管道或者轴封的地方有泄漏会导致空气被吸入到单螺杆泵里面,这样单螺杆泵就会处于吸空气的状态,进口管道不能形成负压所以螺杆泵吸不上液体。处理方法是检查、修理管道,排除杂物,调整更换轴封。 单螺杆泵电机反转也会导致螺杆泵吸不上液体的现象出现,调整电机的极性接头就可以了。 抽吸的矿浆太干,或在半干状态下运转也是螺杆泵吸不上液体的原因,这种情况只能稀释或向进料口加入充足的矿浆。 输送的液体粘度太高也会导致螺杆泵吸不上液体,如果是液体粘度太高的问题只能降低螺杆泵的转速然后提高液体的温度后使其粘度降低或者改用立式螺杆泵。