杆柱脱落rod shedding杆柱脱落也是螺杆泵常发生的一种故障现象，表现为运行电流很低，井口也无产液，mono，正反循环油套不连通，通过对扣或下入抽油杆打捞工具就可以进行处理来恢复生产。抽油杆脱落也有两种情况，一是脱扣，一是掳扣。造成脱扣的原因是停机后抽油杆柱扭转变形余能释放引起杆柱反转，可以采取在地面和抽油杆柱上安装防倒装置进行防止。造成杆柱掳扣的原因有三个：一个是稠油井在长时间关井后再启泵时，启动扭矩---大，把螺纹损坏了；一个是油---稠，螺杆泵长期在高扭矩下工作而把螺纹损坏；再有一个原因是定子部分脱胶，转子转不动造成的。
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 ws= 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.
ｅ、抽油杆扶正器e， ---er rod centralizer抽油杆扶正器由心轴和扶正筒组成，它接在两根抽油杆之间，被卡在两个抽油杆接箍之间。心轴也就是一要极短的抽油杆短节。扶正筒是一个内孔比心轴大１ｍｍ左右的空心塑料筒，外部有四个略比油管内径小的扶正翼，采取浇注成型。扶正筒可以围绕心轴转动，防止抽油杆旋转时与内壁接触而磨蚀油管，又可以让流体通过。the ---er rod centralizer is comed of the heart shaft&the upright cylinder， which is connected between the two ---er rods&is stuck between the two ---er rod hoops. the axis of the heart is also an extremely short rod short section. the ws=ing cylinder is a hollow plastic tube inner hole bixin shaft around 1mm， external four slightly smaller than the diameter of the tubing centralizer wing， adopt casting. the centralizer can revolve around the axis to prevent the ---er rod from touching the inner wall when it rotates，&it can also let the fluid pass through.
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