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Development of Hydraulic Turbodrills for Deep Well Drilling

Arctic Competence Center, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
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Author to whom correspondence should be addressed.
Academic Editor: José A.F.O. Correia
Appl. Sci. 2021, 11(16), 7517; https://doi.org/10.3390/app11167517
Received: 20 July 2021 / Revised: 8 August 2021 / Accepted: 11 August 2021 / Published: 16 August 2021
(This article belongs to the Topic Industrial Engineering and Management)
The article discusses the possibility of improving the design of the turbine of a hydraulic drilling machine for drilling wells in very hard rocks and at considerable depths (5000–12,000 m). The analysis of the results of studies on the technical and technological characteristics of downhole drilling motors showed that it is impossible to ensure stable operation due to the limitation on the operating temperature, while with an increase in the flow rate of the drilling fluid, they do not provide the required power on the spindle shaft, and cannot reach high-speed drilling. In such conditions, turbodrills with a significant change in the profile of the stator and rotor blades and a reinforced support unit are most suitable. The paper presents an invariant mathematical model, which made it possible to determine the optimal geometric parameters based on preselected boundary conditions and the main performance characteristics of the turbine being developed. The results obtained were tested by the finite element method, which showed a convergence of 12.5%. At the same time, zones with the lowest and highest flow rates were identified. Additionally, this paper presents a comparative analysis of the obtained hydraulic turbine with turbodrills of the TSSH-178T and Neyrfor TTT 2 7/8 brands. In comparison with the domestic turbodrill, the developed turbine design shows a 13-fold reduction in its length and a 3-fold reduction in torque, provided that the maximum power is increased by 1.5 times. In comparison with the foreign analog, there is a decrease in length by 8.5 times, an increase in torque by 5 times, and in maximum power by 6.5 times. View Full-Text
Keywords: drilling of wells; high-speed drilling; hydraulic downhole motor; increasing the energy efficiency of drilling; development of a turbodrill; optimization by the trusted region; finite element method drilling of wells; high-speed drilling; hydraulic downhole motor; increasing the energy efficiency of drilling; development of a turbodrill; optimization by the trusted region; finite element method
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MDPI and ACS Style

Dvoynikov, M.V.; Sidorkin, D.I.; Kunshin, A.A.; Kovalev, D.A. Development of Hydraulic Turbodrills for Deep Well Drilling. Appl. Sci. 2021, 11, 7517. https://doi.org/10.3390/app11167517

AMA Style

Dvoynikov MV, Sidorkin DI, Kunshin AA, Kovalev DA. Development of Hydraulic Turbodrills for Deep Well Drilling. Applied Sciences. 2021; 11(16):7517. https://doi.org/10.3390/app11167517

Chicago/Turabian Style

Dvoynikov, Mikhail V., Dmitry I. Sidorkin, Andrey A. Kunshin, and Danil A. Kovalev 2021. "Development of Hydraulic Turbodrills for Deep Well Drilling" Applied Sciences 11, no. 16: 7517. https://doi.org/10.3390/app11167517

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