Measurement of Stress Waves Propagation in Percussive Drilling [PDF]
Sensors, 2021 This work describes the results of a test campaign aimed to measure the propagation of longitudinal, torsional, and flexural stress waves on a drill bit during percussive rock drilling.
Diego Scaccabarozzi, Bortolino Saggin
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Full and half-wavelength ultrasonic percussive drills [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
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Bioinspired Drilling for Extraterrestrial Applications [PDF]
BiomimeticsThis review presents the novel synthesis of nature-inspired drilling strategies specifically tailored for extraterrestrial environments, where conventional technologies fail under the environmental conditions and power and mass constraints.
Gal-Erdene Battsengel +3 more
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Percussive-Rotary Drilling Machine
Наука и техника, 2003 The paper contains description of percussive-rotary drilling machine which is designed for hole sinking in the process of engineering and geological research.
G. T. Shiroky, M. A. Litvin
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Theoretical analysis and design of hydro-hammer with a jet actuator: An engineering application to improve the penetration rate of directional well drilling in hard rock formations. [PDF]
PLoS ONE, 2018 Rapid horizontal directional well drilling in hard or fractured formations requires efficient drilling technology. The penetration rate of conventional hard rock drilling technology in horizontal directional well excavations is relatively low, resulting ...
Jiang-Fu He +3 more
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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 +2 more
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Experimental-numerical method for evaluation of energy consumption in percussive drilling of granite [PDF]
EPJ Web of Conferences, 2021 Most geothermal energy is found in hot and dry rock (HDR), and the total resources distributed at depths of 3-10 km are 20.9×106 EJ. Most HDR projects are developed in granite formations and understanding and control of the energy consumption in ...
Yao Wei, Hokka Mikko
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Research on Impact Stress Transfer Characteristics of Lunar Rock Coring Drill
Shock and Vibration, 2021 In the whole lunar surface drilling and sampling task, it is critical to make the operation of the drilling and sampling impact system efficient and reliable.
Peng Li +4 more
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Evaluation of the energy efficiency of rotary percussive drilling using dimensionless energy index
Journal of Rock Mechanics and Geotechnical Engineering, 2022 This paper sets forth a geomechanics framework for assessing the energy efficiency of rotary percussive drilling using the energy criterion, which has been proposed by Victor Oparin for volumetric destruction of high-stress rocks having nonuniform ...
V.N. Oparin +3 more
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Energy Science & Engineering, 2021 Compound percussive drilling technology is a new method to improve the rock‐breaking efficiency in deep hard formation. In order to study the rock‐breaking mechanism of compound impact drilling, the thermal‐structure coupling simulation of the dynamic ...
Wei Wang +5 more
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