The effect of eccentric tension on the corrosion-fatigue resistance of pump rods

Keywords

sucker rod, stress, stress-strain state, fatigue, eccentric tension.

Cite as

Krechkovska H. V., Fedorovych Ya. T., Kopei B. V., and Mykhailiuk V. V. The effect of eccentric tension on the corrosion-fatigue resistance of pump rods. Physicochemical Mechanics of Materials. 2024. 60(4), 121-128.

https://doi.org/10.15407/pcmm2024.04.121

 

Abstract

Complex operating conditions of sucker rods in wells are caused by the action of high alternate loads and corrosive-active technological environments. The most severe load conditions of sucker rods are associated with eccentric tension. In order to predict the performance of operated sucker rods, simulation and calculation modeling of the stresses which will occur in them under real operating conditions is proposed. It is experi­mentally demonstrate that under eccentric tension of rods, their fatigue life decreases, and the fatigue characteristics of rods made of 20N2M and 15N3MA steels become practically the same after their 5 years of operation.

References

1. B. V. Kopei, and I. B. Kopei, Pump Rods of Well Rigs for Oil Extraction, Ivano-Frankivskyi Natsionalnyi Universytet Nafny i Gazy, Ivano-Frankivsk (2009).
2. B. V. Kopei, Ya. T. Fedorovych, and V. V. Mykailyuk, “Oil and gas equipment,” Vol. 15 in: B. D. Kopei (editor) Evaluation of Operating Capacity and Increase of Pump Rods Lifetime [in Ukrainian], Ivano-Frankivskyi Natsionalnyi Universytet Nafny i Gazy, Ivano-Frankivsk (2023).
3. Gabor Takacs, “Ways to decrease production costs for sucker-rod pumping,” Engineering, Environmental Science, 1-10 (2001). https://doi.org/10.1016/B978-0-12-417204-3.00001-7
4. Gabor Takacs, Sucker-Rod Pumping Handbook, Elsevier (2015). https://doi.org/10.1016/B978-0-12-417204-3.00007-8
5. N. K. Kar, Y. Hu, E. Barjasteh, S. R. Nutt, “Tension-tension fatigue of hybrid composite rods,” Composites. Part B: Eng., 43, Is. 5, 2115-2124 (2012). https://doi.org/10.1016/j.compositesb.2012.03.006
6. Y. Lin, D. Zhang, F. Luo, and T. Shi, “Research on fatigue life calculation of sucker rod,” Pet. Drill. Prod. Technol., 27, 66-69 (2005).
7. H. Ding, A. B. Zhang, D. T. Qi, H. B. Li, P. L. Ge, G. Q. Qi, N. Ding, Z. Q. Bai, and L. Fan, “Failure analysis of a sucker rod fracture in an oilfield,” Eng. Failure Analysis, 109 (2020). Article number 104300. https://doi.org/10.1016/j.engfailanal.2019.104300
8. N. V. Kret, L. M. Svirska, and T. P. Venhrynyuk, “Corrosion-fatigue crack propagation in exploited pump rods made of 20N2M steel,” Mater. Sci., 56, No. 2, 279-283 (2020). https://doi.org/10.1007/s11003-020-00426-w
9. Y. Vynnykov, H. Muhlis, M. Kharchenko, A. Aniskin, S. Manhura, and A. Manhura, “Analysis of corrosion fatigue steel strength of pump rods for oil wells,” Mining of Mineral Deposits, 16, Is. 3, 31-37 (2022). https://doi.org/10.33271/mining16.03.031
10. H. Krechkovska, B. Kopey, B. Bakun, and I. Kopey, “Peculiarities of fatigue crack growth in steel and composite sucker rods,” Proc. Struct. Integrity, 42, 1406-1413 (2022). https://doi.org/10.1016/j.prostr.2022.12.179
11. B. V. Kopei, H. V. Krechkovska, I. B. Kopei, and B. M. Bakun, “Specific features of corrosion-fatigue fracture of steel and hybrid pump rods,” Mater. Sci., 58, No. 6, 768-773 (2023). https://doi.org/10.1007/s11003-023-00728-9
12. E. I. Kryzhanivs’kyi, I. M. Hoisan, and O. Z. Student, “Specific features of the growth of fatigue cracks in 36G2S steel of drill pipes after the recovery heat treatment,” Mater. Sci., 50, No. 1, 92-97 (2014). https://doi.org/10.1007/s11003-014-9695-6
13. API SPEC 11B:2010/ERR 2:2011. Specification for Sucker Rods, Polished Rods and Liners, Couplings, Sinker Bars, Polished Rod Clamps, Stuffing Boxes, and Pumping Tees, API Publ. Services, Washington (2010).
14. A. Gheorghe, S. Suditu, and I. Ghetiu, “Sucker rods string design – rods fatigue behavior interpretation using goodman diagram,” Romanian J. of Petroleum and Gas Technol, IV (LXXV), Is. 1, 17-28 (2023). https://doi.org/10.51865/JPGT.2023.01.02
15. I. N. Wasserman, Longitudinal Oscillations of Elastic Rod Systems with Boundary Conditions Determined by Multivalued Relations [in Russian], Author’s Abstract of PhD Degree (Physical and Mathematical Sciences), Perm (1999).