接箍类普通型扶正器
Ordinary Coupling Centralizer

    本结构产品是由经过热锻、墩精、调质，和对抽油杆专用螺纹扣型采用冷挤轧制工艺技术精加式完成的一端为外螺纹，一端为内螺纹，或两端均为内螺纹的一种特殊抽油杆短节，在短节的中间杆上采用特殊工艺技术方法注塑上一个，或楔入上一个可绕轴旋转的多种形状的扶正件组合。

    The product is a special pup joint for sucker rod processed through hot forging, upsetting, hardening and tempering. both ends of the joint are processed through cold extrusion and rolling. One is externally threaded, the other is internally threaded or both are internally threaded. A centralizing element of different shapes is moulded around or wedged in the middle part of  the pup joint with special technique which can revolve round the joint.