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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Adaptive control method for drilling robot based on coal and rock drillability
Gong-kuang zidonghua, 2023 Due to the complex geological and mechanical environment of coal-bearing strata, the feed resistance of the drilling rig feed system and the load torque of the rotary system are complex and diverse.
LI Wangnian +4 more
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Efficient Removal of Magnetic Contamination From Drilling Fluids: The Effect on Directional Drilling [PDF]
Journal of Energy Resources Technology, 2021 Abstract Magnetic debris in a drilling fluid have a significant influence on the ability of the drilling fluid to maintain its function. Down hole logging can suffer from poor signal to noise ratios. Directional drilling in areas close to the magnetic North Pole, such as in the Barents Sea, Northern Canada, or Russia, can suffer because ...
Saasen, Arild +3 more
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Clean subglacial access: prospects for future deep hot-water drilling [PDF]
, 2015 Accessing and sampling subglacial environments deep beneath the Antarctic Ice Sheet presents several challenges to existing drilling technologies. With over half of the ice sheet believed to be resting on a wet bed, drilling down to this environment must
Smith, Andrew +38 more
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New Dual-Side Derrick and Supporting System Based on Fixed Drilling Platform
Shiyou jixieDue to limited internal space， the arrangement of automated equipment on conventional derrick of traditional offshore platform becomes difficult. The nippling up and down of casing and tribble needs to be carried out on the same monkey board， resulting ...
Yang Xiangqian +3 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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Structural Design and Experimental Study of Multi-Orifice Nozzle Cluster Deep Penetration Microbit
Shiyou jixieAs oilfield exploitation gradually enters middle-late stage， the rapid rock breaking of tight oil and gas formations by bit becomes the key to increasing oil and gas production.
Gao Kai +6 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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Сomparative analysis of efficiency of use a screw drill on frozen soil
Вестник СибАДИ, 2021 Introduction. Drilling of frozen and permafrost soils is one of the complex and energy-intensive processes of earthworks. Drilling tools used on frozen soils implement the process of drilling the soil by deformation of cutting or crushing action. Current
I. G. Martiuchenko, M. I. Zenin
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The rotational motion simulation of AIST small spacecraft prototype based on current values and on a hardware-software stand [PDF]
E3S Web of Conferences, 2023 Improving the quality and volume of drilling is the main condition for advancing the growth of reserves of raw materials of the national economy and industry. Rock-breaking tools are the main and busiest part of drilling equipment.
Khnyryova Ekaterina
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