Results 1 to 10 of about 536,798 (189)
Design optimization of a coal seam annular air reverse circulation bit
Energy Science & Engineering, 2023 Reverse circulation (RC) drilling technology enables the rapid acquisition of coal seam samples, which is crucial in accurately measuring gas content. In addition, the design of the drill bit plays a key role in RC sampling. In this study, the turbulence
Demin Chen +3 more
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Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling
Journal of Marine Science and Engineering, 2022 Due to its high mechanical penetration rate and lack of pollution of the environment, air reverse circulation drilling is considered to be a promising method for ice drilling.
Mengke Wang +4 more
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Energy Science & Engineering, 2023 To solve the insufficient energy for reverse circulation fishing tools in complex structure wells, it is necessary to further optimize the design of the tools to improve the impurity salvage efficiency.
Yumei Li +5 more
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Gas reverse circulation drilling technology for large-diameter DTH hammer
Meikuang Anquan, 2023 Large diameter DTH hammer is a drilling tool which has been proved by a lot of engineering practice and can improve the construction efficiency of large diameter drilling on mine surface. However, after drilling into the aquifer, the penetration rate of
ZHAO Jiangpeng
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Meikuang Anquan, 2021 According to the characteristics of shallow depth of collapse column and fault coring borehole in mining face, the hydraulic reverse circulation coring method of horizontal hole is proposed.
ZHAO Jiangpeng
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On-Chip Microwave Quantum Hall Circulator [PDF]
, 2016 Circulators are non-reciprocal circuit elements integral to technologies including radar systems, microwave communication transceivers, and the readout of quantum information devices.
Colless, J. I. +8 more
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Design Method of Center Pipe Embedded in Reverse Circulation Sampling Pipe Used in Coal Mine
Meikuang Anquan, 2020 Based on the classification and principle of pneumatic conveying system, the technical characteristics of reverse circulation fixed-point sampling device in underground coal mine are analyzed.
ZHANG Rui
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Effect of Axial Agitator Configuration (Up-Pumping, Down-Pumping, Reverse Rotation) on Flow Patterns Generated in Stirred Vessels [PDF]
, 2001 Single phase turbulent flow in a tank stirred with two different axial impellers - a pitched blade turbine (PBT) and a Mixel TT (MTT)- has been studied using Laser Doppler Velocimetry. The effect of the agitator configuration, i.e.
C. Xuereb +22 more
core +2 more sources
Reverse Circulation Drilling Method Based on a Supersonic Nozzle for Dust Control
Applied Sciences, 2016 To reduce dust generated from drilling processes, a reverse circulation drilling method based on a supersonic nozzle is proposed. The suction performance is evaluated by the entrainment ratio.
Dongyu Wu +6 more
doaj +1 more source
Geofluids, 2021 A reverse circulation Down-The-Hole (DTH) hammer drill bit in Casing-while-Drilling (CwD) processes is designed and applied to drilling under complicated formation.
Bo Qi +7 more
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