管柱脫落是自由式管柱結(jié)構(gòu)經(jīng)常發(fā)生的一種現(xiàn)象，這是由于正常運(yùn)轉(zhuǎn)時(shí)轉(zhuǎn)子旋轉(zhuǎn)對(duì)定子產(chǎn)生的摩擦扭矩方向?qū)嶋H上是定子及油管的連接螺紋的卸扣方向，如果摩擦力矩大于油管扣的上扣扭矩，油管就脫扣。當(dāng)尾管很重時(shí)，還會(huì)出現(xiàn)螺紋擄扣。當(dāng)管柱脫落時(shí)，通過作業(yè)重新連接好就能恢復(fù)生產(chǎn)。如果未發(fā)生螺紋擄扣，可以采取對(duì)扣方式打撈，如果發(fā)生擄扣，必須下打撈工具進(jìn)行打撈。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, 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.