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NUMERICAL STUDY OF INFLUENCE OF DEEP CORING PARAMETERS ON TEMPERATURE OF IN-SITU CORE

ABSTRACT
The In-situ coring has a significant effect on the exploration of deep earth. However, in deep hard rock coring, the cutting heat in the process of coring generates high temperature and causes fidelity distortion of the in-situ core. Exploration of the mechanism of heat effect in the coring process is necessary to achieve the continuous control of temperature and obtain in-situ core. Due to the lack of systematic study on the surface and internal temperature rise of core samples during coring process, this paper uses the finite element simulation study the heat effect on the surface of the core under the influence of various cutting parameters. The numerical simulation results show that the surface of the core will not be burned under the cutting speed of 100 mm/s. At the condition of cutting speed 100 mm/s, feed rate 0.03 mm/r, thermal conductivity coefficient 1 W/m°C, the whole temperature rise will not exceed 1°C. The interest results showed that cutting fluid has little effect on the temperature rise in the cutting process. If the requirement of core quality should avoid the pollution by drilling fluid, this study has supported the no drilling fluid for in-situ coring.
KEYWORDS
PAPER SUBMITTED: 2018-08-13
PAPER REVISED: 2018-11-11
PAPER ACCEPTED: 2019-02-01
PUBLISHED ONLINE: 2019-05-26
DOI REFERENCE: https://doi.org/10.2298/TSCI180813209W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 3, PAGES [1441 - 1447]
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© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence