National University of Science and Technology “MISiS” (Moscow, Russia):

Yu. B. Sazonov, Cand. Eng., Associate Prof., Dept. of Metallurgy and Strength Physics, e-mail: u-sazonov@yandex.ru
A. A. Komissarov, Cand. Eng., Head of Laboratory, e-mail: Komissarov@misis.ru
D. Yu. Ozherelkov, Cand. Eng., Engineer, e-mail: d.ozherelkov@gmail.com
D. V. Ten, e-mail: teden92@yandex.ru

Drill pipes in the oil-gas industry play a major role in the extraction of petroleum products. These pipes are the main link in the drilling rig, these pipes create the necessary rotation and transfer the load to the cutting element (chisels), and they also serve to lift working tools from the bottom of the well to the surface. The main goal of the drill pipe is to supply the drilling fluid, which performs the function of cooling the bit. The destruction of such pipes leads to large economic losses, therefore, these pipes must have high quality primarily in terms of mechanical properties. Based on the foregoing, this work is aimed at studying the causes of accidental destruction of steel drill pipes during their operation in the presence of an increased level of internal stresses in them. As the main method for assessing the level of residual internal stresses, a method is proposed for measuring the groove width during the longitudinal opening of ring samples cut from the body wall of drill pipes. This method is distinguished by its clarity and high speed of obtaining the result. The increased level of internal residual stresses, combined with external working loads during operation, leads to a significant reduction in the service life of drill pipes under the influence of corrosion cracking mechanism.

1. Chudyk I., Poberezhny L., Hrysachuk A., Poberezhna L. Corrosion of drill pipes in high mineralized produced water. Procedia Structural Integrity. 2019. Vol. 16. pp. 260–264.
2. Zamani S. M., Hassanzadeh-Tabrizi S. A., Sharifi H. Failure analysis of drill pipe: A review. Engineering failure analysis. 2016. Vol. 59. pp. 605–623.
3. Liu Y., Lian Zh., Lin T., Shen Y., Zhang Q. A study on axial cracking failure of drill pipe body. Engineering failure analysis. 2016. Vol. 59. pp. 434–443.
4. Yan H., Xuehu Z., Zhenquan B., Chengxian Y. Failure analysis on fracture of a S135 drill pipe. Procedia materials science. 2014. Vol. 3. pp. 447–453.
5. API Specification 5DP. Specification for drill pipe. 2010 (R2015).
6. Pustov Yu. А., Rakoch А. G. Diagnosis and examination of corrosion damage of metals. Moscow: Izdatelskiy dom MISiS, 2013. 130 p.
7. Makhlouf A. S. H., Aliofkhazraei M. Handbook of materials failure analysis with case studies from the oil and gas industries. Eisevier. 2016. p. 423.
8. Ming Liu, Sheji Luo, Yi Shen, Xiuzhou Lin. Corrosion Fatigue crack propagation behavior of S135 high-strength drill pipe steel in H₂S environment. Engineering Failure Analysis. 2019. Vol. 97. pp. 496–505.
9. Skvortsov V. F., Arlyapov А. Yu., Boznak А. О., Ogol I. I. Application of the N.N. Davidenkov method for estimation of circumferential residual stresses in hollow cylinders treated with plug. Sistemy. Metody. Tekhnologii. 2016. No. 4. pp. 65–70.
10. Rossini N. S. Methods of measuring residual stresses in components. Materials & Design. 2012. Vol. 35. pp. 572–588.
11. Lihong Han, Ming Liu, Sheji Luo, Tian Jian Lu. Fatigue and corrosion fatigue behaviors of G105 and S135 high-strength drill pipe steels in air and H₂S environment. Process safety and environmental protection. 2019. Vol. 124. pp. 63–74.
12. Argirov J., Yankova R., Antonov G. Study fatigue in materials of drill pipes. TEM Journal. 2016. Vol. 5, Iss. 1. pp. 50–55.
13. Shuanlu Lu, Yaorong Feng, Faqian Luo, Changyi Qin, Xinhu Wang. Failure analysis of IEU drill pipe wash out. International journal of fatigue. 2005. Vol. 27, Iss. 10-12. pp. 1360–1365.
14. Li Fangpo, Liu Yonggang, Wang Xinhu, Lu Caihong. Failure analysis of Ø127 mm IEU G105 drill pipe wash out. Engineering failure analysis. 2011. Vol. 18, Iss. 7. pp. 1867–1872.