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.

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。

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

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。

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The accuracy of thread inspection and quality of threaded connection will be influenced by burrs resulted from the thread cutting process of tubing and casing.

油井管螺纹切削加工中产生的毛刺会直接影响螺纹检验的准确性和螺纹连接质量。

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