Identification method of shoulder torque of screw-on curve of premium threaded connections for OCTG  

作　　者：PENG Zhiniu WANG Minghua 

机构地区：[1]Tube Pipe&Bar Business Unit,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China [2]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China [3]State Key Laboratory of Oil and Gas Equipment,Shanghai 201999,China

出　　处：《Baosteel Technical Research》2024年第3期29-32,共4页宝钢技术研究（英文版）

摘　　要：The meaning of each part of the screw-on curve,the definition of shoulder torque,and the common characteristics of the screw-on curve are introduced.Moreover,the principle and shortcomings of the commonly used method of curve curvature radius are discussed.A new method of sealing surface deformation is proposed based on the requirements of shoulder torque recognition.The calculation method and principle of PW value are elucidated and the advantages of this method are summarized.The proposed method considers the difference value of tightening torque and calculates the elastic deformation of the sealing surface,accurately reflecting the state of the thread compound and the correlation between torque change and elastic deformation of the sealing surface after compression.

关 键 词：screw-on shoulder torque identification method smooth torque curve 

分 类 号：TH131.3[机械工程—机械制造及自动化] TE973[石油与天然气工程—石油机械设备]