ｆ、抽油杆f， ---er rod所使用的抽油杆是常用的普通抽油杆、空心抽油杆和连续抽油杆，莫诺，可根据油井确定。the ---er rod used is commonly used as a common 1---er rod， hollow ---er rod&continuous ---er rod， which can be determined according to the oil well.ｇ、定子扶正器g， stator centralizer定子扶正器为有一定弹性的笼形装罩，每一对由两半构成，中间大、两端小。作用是使定子居中和减小定子的摆动。the stator centralizer is a cage shaped cover with a certain elasticity. each pair is made up of two halves， large in the middle&small at both ends. the function is to make the stator middle&reduce the stator wobble.ｈ、锚定装置h， anchoring device对于没有封隔器的井和泵挂---浅的井，用于固定定子、消除摆动和防止定子脱扣。采用普通的锚定装置即可。for wells without packers&shallow wells with deep pumps， it is used to fix the stator， eliminate the swinging&prevent the tripping of the stator. a common anchoring device can be used.
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.
管柱脱落的故障现象是：运行电流很低，基本上是电机的空载电流，除了有一股一股的气外，井口基本上无产液，正发循环时油套连通。the failure phenomenon of the string is: the running current is very low， basically the motors no load current. besides the gas with a single strand of gas， the wellhead basically has no liquid production，&the oil sleeve is connected when circulating.减少管柱脱落的措施有：将油管上扣扭矩由原来的值提高到值；采用油管螺纹垫片；定子上的装卸短节采用防松螺纹连接；采用油管锚或张力封隔器固定螺杆泵。the measures to reduce the falling off of the pipe string are as follows: increase the torque from the original value to the maximum value; use the oil pipe screw gasket; the loading&unloading joint on the stator is connected by loosening screw thread;&use the oil pipe anchor/tension packer to fix the screw pump.
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