Abstract
Generally the oil and gas drill-strings have a big number of threaded connectors between drill pipes. These ones named tool-joints influence the all drill-string operation characteristics, because they have to provide their reliability during the process of make-up, pumping and drilling. The most important parts of the connectors are pin and box tapered thread. The effect of deviations of the flank angle of the pin thread on equivalent stresses, fatigue safety factor and contact pressures in the drilling tool-joints is studded. Axisymmetric finite-element models of drill-string tool joints with threads 2 3/8 REG and 6 5/8 REG API-sizes has been developed for this. In order to reduce contact pressures on thread flanks, negative deviations of the loaded flank angle of the pin thread should be avoided and positive should be preferred (on the condition that fatigue strength is ensured). In this regard, it is recommended to change the tolerance limits of this flank angle from (29.5°, 30.5°) to (30°, 30.5°) for the pin thread, and do not change the tolerance limits for the box thread.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Xu, H., Shi, T., Zhang, Z., Shi, B.: Loading and contact stress analysis on the thread teeth in tubing and casing premium threaded connection. Math. Prob. Eng. 1, 287076 (2014). https://doi.org/10.1155/2014/287076
Cheng, J., Sun, Y., Yongping, Y., Chen, L., Ma, X.: Nonlinear thermo-mechanical coupled analysis of high temperature effect on strength, contact stress and ultimate torque of tool joint. Int. J. Press. Vessels Pip. 188, 104221 (2020). https://doi.org/10.1016/j.ijpvp.2020.104221
Wang, Y., Xia, B., Wang, Z., Chai, C.: Model of a new joint thread for a drilling tool and its stress analysis used in a slim borehole. Mech. Sci. 7(2), 189–200 (2016). https://doi.org/10.5194/ms-7-189-2016
Dong, L., Wang, J., Zhu, X.: Design and mechanical behavior study of ultrahigh-torque variable pitch casing joint. Adv. Mech. Eng. 11(1), 168781401881408 (2019). https://doi.org/10.1177/1687814018814084
Qingmin, Y., Zhou, H., Wang, L.: Finite element analysis of relationship between tightening torque and initial load of bolted connections. Adv. Mech. Eng. 7(5), 168781401558847 (2015). https://doi.org/10.1177/1687814015588477
Dou, Y., Li, Y., Cao, Y., Yang, Y., Zhang, J., Zhang, L.: FE simulation of sealing ability for premium connection based on ISO 13679 CAL IV tests. Int. J. Struct. Integrity 12(1), 138–148 (2020). https://doi.org/10.1108/IJSI-11-2019-0125
Wang, Y., Qian, C., Kong, L., Zhou, Q., Gong, J.: Design optimization for the thin-walled joint thread of a coring tool used for deep boreholes. Appl. Sci. 10(8), 2669 (2020). https://doi.org/10.3390/app10082669
Dong, L., Zhu, X., Yang, D.: Study on mechanical behaviors of double shoulder drill pipe joint thread. Petroleum 5, 102–112 (2018)
Yosuke, O., Masaaki, S., Yoshinori, A., Taizo, M., Ryosuke, K., Daisuke, T., Masanobu, K.: Fretting fatigue on thread root of premium threaded connections. Tribol. Int. 108, 111–120 (2017)
Sorg, A., Utzinger, J., Seufert, B., Oechsner, M.: Fatigue life estimation of screws under multiaxial loading using a local approach. Int. J. Fatigue 104, 43–51 (2017)
Gao, J., Ma, Y., Wang, D., Ji, S.: Fatigue analysis on wire-line coring drill pipe joints in tonghua well-1 based on ansys workbench. Explor. Eng. Rock Soil Drill. Tunn. 44, 70–78 (2017)
Yin, F., Zhang, Y., Xiong, J., Xiong, L.: Simulation analysis on structural mechanism of the thread for wire-line drill pipe. Explor. Eng. Rock Soil Drill. Tunn. 41, 66–69 (2014)
Gao, S., Sun, J., Cai, J., Liu, D.: Calculation analysis on negative angle thread torque of wire-line coring drill pipe and test research. Explor. Eng. Rock Soil Drill. Tunn. 43, 45–49 (2016)
Shats’kyi, I.P., Lyskanych, O.M., Kornuta, V.A.: Combined deformation conditions for fatigue damage indicator and well-drilling tool joint. Strength Mater. 48, 469–472 (2016)
Shatskyi, I., Ropyak, L., Velychkovych, A.: Model of contact interaction in threaded joint equipped with spring-loaded collet. Eng. Solid Mech. 8(4), 301–312 (2020)
Pryhorovska, T., Ropyak, L.: Machining error influnce on stress state of conical thread joint details. In: Proceedings of the International Conference on Advanced Optoelectronics and Lasers, vol. 9019544, pp. 493–497. IEEE (2019)
Shatskyi, I.P., Ropyak, L.Y., Makoviichuk, M.V.: Strength optimization of a two-layer coating for the particular local loading conditions. Strength Mater. 48(5), 726–730 (2016)
Shatskyi, I.P., Perepichka, V.V., Ropyak, L.Y.: On the influence of facing on strength of solids with surface defects. Metallofizikai Noveishie Tekhnologii 42(1), 69–76 (2020)
Onysko, O., Kopei, V., Pituley, L., Medvid, I., Lukan, T.: Influence of the thread profile accuracy on contact pressure in oil and gas pipes connectors. In: Ivanov, V., et al. (eds.) Advances in Design, Simulation and Manufacturing III. DSMIE 2020, Lecture Notes in Mechanical Engineering, pp. 432–441. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-50794-7_42
Onysko, O., Borushchak, L., Kopei, V., Lukan, T., Medvid, I., Vryukalo, V.: Computer studies of the tightness of the drill string connector depending on the profile of its tapered thread. In: Karabegović, I., et al. (eds.) New Technologies, Development and Application III. NT 2020. Lecture Notes in Networks and Systems, vol. 128, pp. 720–729. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-46817-0_82
Onysko, O.R., Kopey, V.B., Panchuk, V.G.: Theoretical investigation of the tapered thread joint surface contact pressure in the dependence on the profile and the geometric parameters of the threading turning tool. IOP Conf. Ser. Mater. Sci. Eng. 749, 012007 (2020). https://doi.org/10.1088/1757-899X/749/1/012007
Kopei, V., Onysko, O., Panchuk, V.: The application of the uncorrected tool with a negative rake angle for tapered thread turning. In: Ivanov, V., et al. (eds.) Advances in Design, Simulation and Manufacturing II. DSMIE 2019, Lecture Notes in Mechanical Engineering, pp. 149–158. Springer, Cham (2019). https://doi.org/10.1007/978-3-030-22365-6_15
vkopey/ThreadsAbaqus: Abaqus/CAE python scripts for modelling threaded connections of oil and gas equipment. https://github.com/vkopey/ThreadsAbaqus
Serensen, S.V., Kogaev, V.P., Shneiderovich, R.M.: Bearing Capacity and Strength Calculations of Machine Parts. Mashinostroenie, Moscow (1975). in Russian
Sines, G., Waisman, J.L. (eds.): Behavior of Metals Under Complex Static and Alternating Stresses Metal Fatigue, pp. 145–169. McGraw-Hill, New York (1959)
Kopey, V.B., Onysko, O.R., Panchuk, V.G.: Computerized system based on Free CAD for geometric simulation of the oil and gas equipment thread turning. IOP Conf. Ser. Mater. Sci. Eng. 477(1), 012032 (2019). https://doi.org/10.1088/1757-899X/477/1/012032
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this paper
Cite this paper
Kopei, V., Onysko, O., Odosii, Z., Pituley, L., Goroshko, A. (2021). Investigation of the Influence of Tapered Thread Profile Accuracy on the Mechanical Stress, Fatigue Safety Factor and Contact Pressure. In: Karabegović, I. (eds) New Technologies, Development and Application IV. NT 2021. Lecture Notes in Networks and Systems, vol 233. Springer, Cham. https://doi.org/10.1007/978-3-030-75275-0_21
Download citation
DOI: https://doi.org/10.1007/978-3-030-75275-0_21
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-75274-3
Online ISBN: 978-3-030-75275-0
eBook Packages: Intelligent Technologies and RoboticsIntelligent Technologies and Robotics (R0)