Results 1 to 10 of about 213 (157)
Energies, 2021 The rotary-percussion drilling method is a prospective way to decrease drilling costs. It is obvious, based on literature analyses and finished geothermal drilling, that the Lublin Basin can be perceived as the one where rotary-percussion drilling can be
Tomasz Sliwa +2 more
exaly +3 more sources
Mining, 2021 Drill bit failure is a prominent concern in the drilling process of any mine, as it can lead to increased mining costs. Over the years, the detection of drill bit failure has been based on the operator’s skills and experience, which are subjective and ...
Hisatoshi Toriya +2 more
exaly +3 more sources
Discover Applied SciencesRotary percussion drills, specifically top hammer types, are essential in resource extraction and exploration. These drills frequently suffer damage at the drill bit, necessitating effective decision-making to address issues.
Yuna Nakazawa +5 more
doaj +2 more sources
Civil Engineering Dimension, 2023 A dam foundation structure is usually strengthened by grouting, which begins with grout hole drilling. This paper aims to examine a comparison between conventional rotary and rotary-percussion drilling techniques in a drilling case study of the Tugu ...
Dika Prasetyo , Setya Winarno
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Challenges of rock drilling and opportunities from bio-boring
Biogeotechnics, 2023 Drilling plays a significant role in the history of human civilization. The exploration of greater depths, extreme environments, or hazardous areas calls for more energy-efficient and high levels of autonomous drilling technologies with reduced cost and ...
Yumeng Zhao, Sheng Dai
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Identification of Impact Frequency for Down-the-Hole Drills Using Motor Current Signature Analysis
Applied Sciences, 2023 In rotary-percussion drilling, the impact frequency is a crucial variable that is closely linked to operational factors that determine the efficacy of the drilling process, such as the rate of penetration, bit wear, and rock mass characteristics. Typical
Diego Brito +4 more
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Известия высших учебных заведений: Геология и разведка, 2019 Rotary percussion drilling with pneumatic hammers is a promising, high-performance method widely used in the practice of geological exploration, the performance of which is determined mainly by pressure and the amount of cleaning agent supplied by the ...
V. V. Neskoromnykh +2 more
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High Efficiency Drilling Methods for Through Beds Hole in Underground Coal Mine
Meikuang Anquan, 2020 Considering the drilling efficiency problem encountered by crossing holes in underground coal mine, the paper divided roof and floor rock stratum into three grades in order to facilitate the study of technology in underground coal mine: high hard rock (4≤
DOU Xuqian
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Geothermal Energy, 2021 The 3.1- and 3.7-km-deep FFC-1 and DGE-1 geothermal explorations wells drilled into the Precambrian crystalline basement on the southern margin of the Fennoscandian Shield are evaluated regarding experiences from drilling, geological conditions, and ...
Jan-Erik Rosberg, Mikael Erlström
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Influence of Mechanical Rotary Percussion Tool on Bit Feed Friction of Horizontal Well
Shiyou jixie, 2023 Weight-on-bit(WOB)congestion is one of the main factors restricting the penetration rate of sliding drilling in horizontal wells, and the use of vibration friction reduction tools is the most direct and effective way to reduce friction in horizontal ...
Yan Yan +5 more
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