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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&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, 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.
定转子过早磨损premature wear of fixed rotor定转子过早磨损主要是由于定转子的间隙过小引起的。the premature wear of the fixed rotor is mainly caused by the small gap between the fixed rotor&the rotor.油管与抽油杆柱磨损oil pipe&rod string wear油管与抽油杆柱磨损的原因一是因为井斜抽油杆贴在油管壁上引起的，可以通过加抽油杆扶正器使抽油杆柱居中来减轻或消除，另一个原因是定转子不同心及转子的偏心运动造成的，在定子以上加一节内径较大的回转筒即可避免。tubing&-er rod wear reason is because the deviation of -er rod attached to the tubing wall caused by heating, pumping rod centralizer make the rod cct to reduce/eliminate, another reason is caused by the eccentric motion of the rotor&the rotor are not concentric, avoid a day the diameter of rotary cylinder in the stator can be larger than.
ｄ、限位器d, limiting device限位器为一个底部带限位板和流-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&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&lose its function&prevent the rod from falling into the bottom when the rod string falls off.
211g型单螺杆泵可无脉动地工作 g型单螺杆泵工作时,通过螺杆转子与泵套的孔壁间形成的一个个密封腔,平稳地从低压区运送到高压区,在整个运送过程中,介质作纯轴向运动,可完全做到无脉动地运送介质。这一点与齿轮泵不同。齿轮泵工作时,在齿轮的转动下,介质作轴向与径向及其复合方向的运动,产生明显的搅拌现象。其输出压力的表现形式:g型单螺杆泵的输出压力比较稳定,齿轮泵则出口压力会有波动。这一点在输送高粘度的介质(如重油等)时比较-。
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