Results 1 to 10 of about 177 (131)

Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells

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, Aneta Sapińska-Śliwa, Marek Jaszczur   +2 more
exaly   +3 more sources

Drilling Processes with Hydraulic Percussion Rock Drills

Journal of MMIJ, 2017
Rock drills were developed about two hundred years ago, and hydraulic percussion rock drills are about half-century old. Performance and efficiency of rock drills have been increased by a number of researchers and engineers.
Kimihiro HASHIBA, Katsunori FUKUI, Masahiro KOIZUMI   +2 more
doaj   +3 more sources

Design of a Femtosecond Laser Percussion Drilling Process for Ni-Based Superalloys Based on Machine Learning and the Genetic Algorithm

Micromachines, 2023
Femtosecond laser drilling is extensively used to create film-cooling holes in aero-engine turbine blade processing. Investigating and exploring the impact of laser processing parameters on achieving high-quality holes is crucial.
Chenchong Wang
exaly   +3 more sources

A multi-dimensional percussion method for efficient drilling in HDR formations: Rock fragmentation mechanism, drilling energy analysis, and performance optimization

International Journal of Mining Science and Technology
Percussion drilling is a promising approach for hot dry rock (HDR) fragmentation. However, understanding of HDR fragmentation mechanism under multi-dimensional percussion remains limited and hinders the corresponding drilling performance.
Huai Zhong, Zhongwei Huang, Wenhao He
exaly   +3 more sources

One-Dimensional Convolutional Neural Network for Drill Bit Failure Detection in Rotary Percussion Drilling

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, Lesego Senjoba, Kawamura Youhei   +2 more
exaly   +3 more sources

Comparative Study of Conventional Rotary and Rotary-Percussion Techniques in Grout Hole Drilling from the Perspectives of Time, Cost, and Quality

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
doaj   +1 more source

Advances on Percussion Drilling with Femtosecond Laser in GHz-burst Mode [PDF]

EPJ Web of Conferences, 2023
Micromachining of various materials with femtosecond lasers operating in the GHz-burst regime has recently attracted great attention. In this contribution, we show our latest results on top-down percussion drilling in different dielectrics in this new ...
Balage Pierre, Guilberteau Théo, Lafargue Manon, Bonamis Guillaume, Hönninger Clemens, Qiao Jie, Lopez John, Manek-Hönninger Inka   +7 more
doaj   +1 more source

Modernization of rock-cutting tool for rotary-percussion drilling that implements eccentric application of impact pulses

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, A. E. Golovchenko, M. S. Popova   +2 more
doaj   +1 more source

Crack-free high-aspect ratio holes in glasses by top–down percussion drilling with infrared femtosecond laser GHz-bursts

International Journal of Extreme Manufacturing, 2022
We report novel results on top-down percussion drilling in different glasses with femtosecond laser GHz-bursts. Thanks to this particular regime of light – matter interaction, combining non-linear absorption and thermal cumulative effects, we obtained ...
Pierre Balage, John Lopez, Guillaume Bonamis, Clemens Hönninger, Inka Manek-Hönninger   +4 more
doaj   +1 more source

A New Mechanical Specific Energy Model for Composite Impact Drilling

Applied Sciences, 2022
Composite impact drilling technology is one of the important techniques to increase drilling speeds in deep hard formations. In order to evaluate the efficiency of drilling with a composite impactor in real time and effectively, and to further improve ...
Jianyu Qin, Siyuan Yin, Naitong Yang, Xuyue Chen, Bo Tian, Liang Xue, Yi Ma   +6 more
doaj   +1 more source