PSI - Issue 22

Yufei Li et al. / Procedia Structural Integrity 22 (2019) 43–50 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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(2) The states of the premium connection are tension on one side and compression on the other side when exerted by bending load. The distribution of Von Mises stress and contact pressure on the sealing surface are similar, both are smaller on the tension side and greater on the compression side. (3) Temperature has a great influence on the stress of premium connections. When designing or selecting premium connections, the influence of temperature should be taken into consideration. (4) After a complete thermal cycle test, the Von Mises stress and contact pressure of the premium connection sealing surface are slightly decreased, and the connection can still maintain good connection and sealing ability, but the integrity of the connection after long-term alternating loads needs to be evaluated seriously. (5) The finite element analysis method can effectively simulate the load conditions in ISO 13679 test, which can be taken as the substitution of physical experiment. Acknowledgements This research was funded by the China National Petroleum Corporation Major Science and Technology Special Project (grant number 2016E-0608) and the Chinese National Natural Science Foundation (grant number Bai, H., He, S., Dang, T., 2011. Analysis of the current status of research on special threaded joints of oil casings in China. Welded Pipe 34 (11),30 34. Cai, X., Gao, L.,2008. Development Status of Special Threaded Joints for Oil Casings in China. Welded Pipe 31(4), 41-44. Cao, Y., Dou, Y.,2013. Finite element method and its application in petroleum engineering, Northwestern Polytechnical University Press, Xi'an. Gabriel E C, Andrea Bufalini, Luis Conde, et al. Low SCF integral premium connections for use in highly demanding casing and tubing drilling operations [C].16566, Offshore technology conference, Houston, 2004. GB/T 21267-2017, Oil and Gas Industry Casing and Tubing Thread Connection Test Procedure [S]. G. R. Murtagian,V.Fanelli, J.A.Villasante., 2004 Seal-ability of stationary metal-to-metal seals. Mechanical Technology Department (126),591-596. Li, L., Wei, X., Dou Y.,2017. Finite element analysis of special threaded oil pipe joints considering temperature effects. Petroleum Machinery 45(11), 105-110. MO, L., TU, L., FU, Q., 2018 Sealing Performance Analysis of Double Primary Sealing Structure for Premium Thread Connection. Lubrication Engineering 43(2),87-93. Petroleum and Natural Gas Industries. Procedures for testing casing and tubing connection: ISO 13679: 2002[S]. Geneva: International Organization for Standardization, 2002 ． Sugino M, Nakamura K, Yamaguchi S, et al. Development of an innovative high performance premium threaded connection for OCTG [C]. 20734, Offshore technology conference, Houston, 2010. SY/T 6268 — 2008, recommended practice for oil casings [S]. Tao G, Xie J. Analytical Evaluation of Casing Connections for Thermal Well Applications[C]. SPE 165493, Calgary, 2013. Xu, Z., Yan, X., Yang, X.,2011. Calculation of casing system reliability in complex well condition. Journal of China Universi ty of Petroleum (Edition of Natural Science) 33(9),1146-1153. Zhang, R., Wei, X., Dou, Y.,2016. Effect of Temperature Load on Sealing Performance of Special Threaded Tubing Joints. Machinery Design and Manufacture Engineering 45(12),78-81. 51674199). References