特别适用于中空管状螺纹加工，如油管接头、自行车、汽机车零件、散热管、牙管等滚牙加工。

Especially for tubular thread processing, such as pipe fittings, bicycle, motorcycle parts, heat pipes, tubes and other dental rolling processing.

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粘扣是套管接头的失效形式之一，它发生在套管上扣操作过程中的螺纹处。

Gluing is one of the failure forms for casing connection, and it is occurred in the thread during casing makeup.

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传统的套管接头不能满足连接与密封要求，并设计出了一种新型的膨胀连接螺纹结构。

Conventional connector for casing string can't meet the demand of seal and connection in solid expandable tubular and presented a new thread structure for an expandable casing connector.

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