论保证API油管螺纹连接密封性能的控制措施  

Measures for ensuring the sealing property of threaded connection of API tubing.

作　　者：冯德渝 

机构地区：[1]湖北国营第388厂

出　　处：《石油机械》1999年第5期11-15,57-58,共5页China Petroleum Machinery

摘　　要：根据多年从事油管螺纹加工和质量控制的经验体会，阐述了在油管螺纹梳刀的重磨及安装、油管螺纹的锥度误差、螺距误差、牙型误差及质量检测等方面所采取的保证API油管螺纹连接密封性能的控制措施。重点分析了直接用梳刀粗车和精车或用普通螺纹车刀粗车和梳刀精车油管螺纹的优缺点及牙型误差，指出正确的油管螺纹加工方法应是先用普通螺纹车刀粗车，再用梳刀精车。建议把油管螺纹梳刀牙顶及牙底削平高度参数的制造公差由±0．02mm提高到±0．01mm，并把油管螺纹的累积螺距公差控制在±0．02mm范围内，以提高API油管螺纹连接的密封性能。Based on the experience of tubing thread machining and quality control for many years, the measures for ensuring the sealing property of threaded connection of API tubing are expounded. The advantages and disadvantages of machining and fine turning by screw chaser or machining by conventional thread lathe and fine turning by screw turning and the error of the thread profile are analyzed,and it is pointed out that the correct method for tubing thread machining is machining by conventional thread lathe first and fine turning then by screw chaser. It is suggested that, to improve the sealing property of threaded connection of API tubing, the manufacturing tolerance of the root and top of the thread should be improved from ± 0.02mm to ± 0.01mm, and the accumulative thread pitch tolerance be controlled within ±0.02mm.

关 键 词：油管 螺纹连接 密封性能 质量控制 API 

分 类 号：TE973.06[石油与天然气工程—石油机械设备]