Investigation of heating of the drilling bits and definition of the energy efficient drilling modes

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.71995

Keywords:

temperature settings, drilling, CFD simulation, energy efficiency, pulse flushing

Abstract

The work deals with the study of processes of heat exchange on a working face of a well when drilling with diamond drilling bits. The urgency of the problem stems from the development of new drilling technologies, where a flushing liquid is supplied in a pulse mode. The aim of the study is the justification of the settings of impulse flushing to enable energy-efficient resource-saving drilling mode. By such modes we understand those with the contact temperature not exceeding 600°C at the specified parameters of drilling.

Experimental study and computer simulation of the processes of heating of drill bits with different modes of flushing were carried out. The task of joint impact of pulse flushing parameters (intervals and pauses) and mode parameters of drilling (flushing fluid consumption and downhole power) on the contact temperature on the working face was solved. On the basis of the obtained data, we designed a nomogram that allows determining the rational values of pause intervals and flushing fluid supply, level of downhole power, flushing fluid consumption, with which energy and resources efficient drilling mode is provided. Thus, the results of this work can be used to control the thermophysical processes on the working face and to select energy-efficient drilling modes.

Author Biographies

Andrii Dreus, Oles Honchar National University Gagarina ave., 72, Dnipropetrovsk, Ukraine, 49010

PhD, Associate professor

Department of fluid mechanics and energy and mass transfer

Anatolii Kozhevnikov, National Mining University K. Marks ave., 19, Dnipropetrovsk, Ukraine, 49005

Doctor of technical science, professor

Department of Mineral Prospecting Technology

Katerina Lysenko, Oles Honchar National University Gagarina ave., 72, Dnipropetrovsk, Ukraine, 49010

PhD, Associate professor

Department of fluid mechanics and energy and mass transfer

Andrii Sudakov, National Mining University K. Marks ave., 19, Dnipropetrovsk, Ukraine, 49005

Doctor of technical science, professor

Department of Mineral Prospecting Technology

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Published

2016-06-30

How to Cite

Dreus, A., Kozhevnikov, A., Lysenko, K., & Sudakov, A. (2016). Investigation of heating of the drilling bits and definition of the energy efficient drilling modes. Eastern-European Journal of Enterprise Technologies, 3(7(81), 41–46. https://doi.org/10.15587/1729-4061.2016.71995

Issue

Section

Applied mechanics