Results 11 to 20 of about 287,346 (143)
Aspects of energy requirements for rock drilling [PDF]
, 1974 Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
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Use of the Rotary-Percussion Drilling Technology in the OKR Mining Conditions and by Drilling the Wells for Purposes of Heating Pump Installation [PDF]
Acta Montanistica Slovaca, 2004 Sedimentary rocks in the Ostrava-Karviná Coalfield (OKR) especially the Saddle Seams of the Karviná Formation are marked with considerable abrasive property following from the high content of siliceous component in these rocks.
Koníèek Jiøí, Mazáè Josef
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Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]
, 2008 Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu +3 more
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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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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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Design and Application of a Rock Breaking Experimental Device With Rotary Percussion [PDF]
, 2016 The rotary impact drilling technology is one of the effective speed-up methods in drilling deep well. The dynamics model of the impact process and rock breaking shows that the peak value of the impact load is affected by the spring compression, and the ...
XUAN, Lingchao +2 more
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Shock and Vibration, 2017 Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the ...
Peng Li +3 more
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Investigation of delamination mechanisms during a laser drilling on a cobalt-base superalloy [PDF]
, 2013 Temperatures in the high pressure chamber of aircraft engines are continuously increasing to improve the engine efficiency. As a result, constitutive materials such as cobalt and nickel-base superalloys need to be thermally protected.
SCHNEIDER, Matthieu +8 more
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Structural Design and Test of Mechanical Rotary Percussion Drilling Tool
Shiyou jixie, 2020 Rotary percussion drilling technology can greatly increase the ROP of hard formations, but for plastic rocks, rock fragmentation is poor. For this reason, this paper proposes a technical plan for mechanical rotary percussion drilling tool prototype ...
Zhang Haiping
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Shiyou jixieThe compatibility of percussion tools， PDC cutter types and hard rock formations is a key factor in extending the service life of percussion tools and drill bits and achieve the best rock breaking effect， but it has been rarely studied.
Leng Youheng +4 more
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