基于耦合模型的双台肩螺纹钻杆接头台肩力学性能  

Mechanical performances of double-shoulder threaded drilling pipe s joint shoulder based on coupling model

作　　者：张彦廷[1] 曹洪祥 郑志滨 沈东杰 孙巍巍 齐嵩岭 宋继龙 陈敬凯[1] ZHANG Yanting;CAO Hongxiang;ZHENG Zhibin;SHEN Dongjie;SUN Weiwei;QI Songling;SONG Jilong;CHEN Jingkai(College of Mechanical and Electronic Engineering in China University of Petroleum(East China),Qingdao 266580,China;CNPC Greatwall Drilling Company,Beijing 100101,China;PetroChina Qinghai Oilfield Company,Xining 810006,China)

机构地区：[1]中国石油大学(华东)机电工程学院,山东青岛266580 [2]中国石油长城钻探工程公司,北京100101 [3]中国石油青海油田分公司,青海西宁810006

出　　处：《中国石油大学学报（自然科学版）》2022年第4期137-142,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家重点研发计划(2021YFE0111400,2019YFA0708301);中石油重大科技项目(ZD2019-183-005)。

摘　　要：双台肩螺纹钻杆接头的预留副台肩间隙对主副台肩接触应力有重要影响,为保证接头性能,需探究其主副台肩的力学特性。通过对双台肩接头进行力学分析和有限元仿真建立其耦合模型,依据耦合模型进行统计拟合得到主副台肩摩擦力力矩和螺纹处力矩与上扣扭矩的数值关系,进而得到接头完整仿真条件。在此基础上以NC38接头为例,研究其在不同上扣扭矩下副台肩预留间隙与其台肩接触应力的关系。结果表明:双台肩接头的副台肩预留间隙对接头性能起关键作用,在一定的上扣扭矩下,应选择合适的副台肩预留间隙,以保证副台肩的主密封性和可靠性;随上扣扭矩的增大或减小,预留间隙也应随之改变,使主副台肩性能得到更好的配合发挥;该研究方法可以帮助设计者更好的确定双台肩接头最佳的副台肩预留间隙。The reserved secondary shoulder clearance of the double shoulder threaded drilling pipe s joint has an important influence on the contact stress of the primary and secondary shoulders.In order to ensure the joint performances,it is necessary to explore the mechanical properties of the primary and secondary shoulders.Through the mechanical analysis and finite element simulation on the double shoulder joint,the coupling model was established,and the numerical relationship between the frictional torque of the primary and secondary shoulders,the torque at the thread,and the make-up torque was obtained by statistical fitting according to the coupling model,so as to obtain the complete simulation conditions of the joint.On this basis,taking the NC38 joint as an example,the relationship between the reserved clearance of the secondary shoulder and the contact stress of its shoulder under different make-up torques was studied.The results show that the reserved clearance of the secondary shoulder of the double shoulder joint plays a key role in the joint performance.Under a certain make-up torque,the appropriate reserved clearance of the secondary shoulder should be selected to ensure the primary sealing and reliability of the secondary shoulder.With the increase or decrease of the make-up torque,the reserved clearance should also be changed to give a better play to the performance of the primary and secondary shoulders.This method can help designers better determine the best reserved clearance of the secondary shoulder of the double shoulder joint.

关 键 词：双台肩螺纹钻杆接头 耦合模型 有限元仿真 副台肩间隙 主副台肩应力 

分 类 号：TE921[石油与天然气工程—石油机械设备]