Results 201 to 210 of about 233,896 (243)
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Critical Investigation of Wear Behaviour of WC Drill Bit Buttons
Rock Mechanics and Rock Engineering, 2012Mining and petroleum drill bits are subjected to highly abrasive rock and high-velocity fluids that cause severe wear and erosion in service. To augment the rate of penetration and minimize the cost per foot, such drill bits are subjected to increasing rotary speeds and weight.
Anurag Gupta +2 more
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WEAR TESTING OF BUTTONS IN BITS FOR BLASTHOLE DRILLING
Tribologia, 2018The article presents the results of the wear testing of buttons in selected types of bits with the diameter of 95 mm used for blast hole drilling in a rock mining. The purpose of the testing was to determine the type of the wear of peripheral and frontal buttons in the actual operating conditions of bits and the impact of selected parameters of the ...
Rafał DUDEK, Krzysztof WŁADZIELCZYK
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Structural Analysis Of Down The Hole Button Bit With Different Materials
Materials Today: Proceedings, 2018Abstract Modeling and analysis of Down the hole button bit deals with evaluate the button bit with multiple button materials like tungsten carbide, titaninium carbide and oil quenched steel. The main aim of this paper is to find out the suitable material for button manufacturing among tungsten carbide, titanium carbide and oil quenched steel.
D. Ravi +4 more
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International Journal for Numerical and Analytical Methods in Geomechanics, 2012
SUMMARYThis paper considers numerical modelling of rock fracture induced by dynamic bit–rock interaction in percussive drilling. The work presented here extends the author's earlier research on the topic from the axisymmetric case to 3D case. The numerical method for modelling rock fracture includes a constitutive model for rock and a contact mechanics‐
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SUMMARYThis paper considers numerical modelling of rock fracture induced by dynamic bit–rock interaction in percussive drilling. The work presented here extends the author's earlier research on the topic from the axisymmetric case to 3D case. The numerical method for modelling rock fracture includes a constitutive model for rock and a contact mechanics‐
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Evaluation of a Drill Bit Button Arrangement for Enhanced Drilling Efficiency
Transactions of the Korean Society of Mechanical Engineers A, 2015The drill bit, which directly transmits percussive forces and torque to the rock, is the core part of a rock drilling machine. For effective drilling, the button arrangement of a drill bit should be optimized because it is the most important design factor in determining drilling efficiency.
Hoon Kang +5 more
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Abrasivity evaluation for wear prediction of button drill bits using geotechnical rock properties
Bulletin of Engineering Geology and the Environment, 2019The current study investigates the wear life of button bits and rate of penetration (ROP) of rotary-percussive drilling machines by employing geotechnical rock properties. According to the research plan, three hydropower projects and six active mining quarries in Pakistan were included. The field work included recording of drill bit consumption (m/bit)
Y. Majeed, M. Z. Abu Bakar, I. A. Butt
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Comparison of Drilling Performance of Chisel and Button Bits on the Electro Hydraulic Driller
Rock Mechanics and Rock Engineering, 2012Electro hydraulic drillers have been widely used in mining for drilling and roof-bolting. In the drilling process, the performance of the machine is predicted by selecting an appropriate bit type prior to drilling operations. In this paper, a series of field drilling studies were conducted in order to examine and compare the performance of chisel and ...
Olgay Yaralı, Nuri Ali Akcin, Okan Su
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Evaluation of drilling efficiency by percussion testing of a drill bit with new button arrangement
International Journal of Precision Engineering and Manufacturing, 2014Rock drilling machines are commonly used for surface drilling, soil nailing reinforcement, tunnel excavation, and underground mining. These machines use drill bits that directly impact into the rock and are operated by percussive force and torque. Drill-bit buttons need to be designed to increase drilling efficiency; here, we present the results of a ...
Ki-Beom Kwon +5 more
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Journal of Energy Resources Technology, 2020
Abstract Percussive drilling is suitable for the fragmentation of rocks and other similar materials with hard and brittle properties. Research on energy transfer efficiency is of great significance to improving the rock-breaking efficiency of percussive drilling.
Hengyu Song +6 more
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Abstract Percussive drilling is suitable for the fragmentation of rocks and other similar materials with hard and brittle properties. Research on energy transfer efficiency is of great significance to improving the rock-breaking efficiency of percussive drilling.
Hengyu Song +6 more
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Numerical and experimental study of percussive drilling with a triple-button bit on Kuru granite
International Journal of Impact Engineering, 2014Abstract This paper deals with numerical and experimental research of percussive drilling. A finite element based modelling approach, developed earlier by the authors, was employed in the simulation of the dynamic bit-rock interaction process. The rock fracture in this approach was modelled with a damage-viscoplasticity model accounting for the main ...
Timo Saksala +3 more
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