Results 11 to 20 of about 955 (135)
Forward multi-stage large-diameter reaming technology for directional high-level borehole in roof
Gong-kuang zidonghua, 2020 Directional high-level borehole in roof is an important means to control mining pressure-release gas in coal mine underground. Due to limitation of drilling device, the borehole diameter is small in once-through drilling, and borehole group arrangement ...
JIA Mingqu
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Automation of liquid fertilizer application aystem in a direct drill machine
International Journal of Agriculture Environment and Food Sciences, 2022 An automation system was designed to measure and monitor the amount of liquid fertilizer sprayed on a direct drill machine with the ability to apply liquid fertilizer. The clogging of spray nozzles is a common problem in liquid fertilizer machines. The objective is to detect clogged spray nozzles during the application of liquid fertilizer and to allow
Behice Boran AKTEPE +2 more
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A Random Forest-Based Method for Predicting Borehole Trajectories
Mathematics, 2023 Drilling trajectory control technology for near-horizontal directional drilling in coal mines is mainly determined empirically by manual skew data, and the empirical results are only qualitative and variable, meanwhile possessing great instability and ...
Baoyong Yan +5 more
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Applied Sciences, 2023 Measurement while drilling (MWD) data reflect the drilling rig–rock mass interaction; they are crucial for accurately classifying the rock mass ahead of the tunnel face.
Xu Cheng +4 more
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Energies, 2022 This article is devoted to the development of technology for improving the efficiency of directional well drilling by predicting and adjusting the system of static and dynamic components of the actual weight on the bit, based on the real-time data ...
Andrey Kunshin +3 more
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Design and Preliminary Testing of an Electrified Directional Drilling Machine
, 2022 Paper dealing with smart electrification of a drilling ...
Berzi, Lorenzo +4 more
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A Study on Machining Performances of Micro-Drilling of Multi-Directional Carbon Fiber Reinforced Plastic (MD-CFRP) Based on Nano-Solid Dry Lubrication Using Graphene NanoPlatelets [PDF]
Materials, 2021 The objective of this study is to investigate the tribological behavior of graphene nanoplatelets (xGnPs) as nano-solid lubricants, and to evaluate their applicability to the micro-drilling of multi-directional carbon fiber-reinforced plastic (MD-CFRP). To verify the tribological effect of nano-solid lubricants, three kinds of xGnPs (xGnP C-750, xGnP M-
Kim, Jin Woo +3 more
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Journal of Materials Research and Technology, 2023 Holes are an essential component in achieving the desired function of implants. As the prevalent application of additive manufacturing in the field of implants, the hole-forming quality of additively manufactured parts using conventional machining has become a limitation.
Hao Lu +8 more
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Auxiliary adding and transporting technology of directional drill pipes
Meikuang Anquan, 2022 For the problems of high labor intensity and poor safety of manual way to add and transport the directional drill pipes in underground coal mine, based on the large diameter directional drilling rig structure layout and drilling technology ...
CHEN Zeping
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A Designed Calibration Approach for the Measurement-While-Drilling Instrument
Applied Sciences, 2022 The Measurement-While-Drilling (MWD) system, composed of a tri-axial magnetometer and a tri-axial accelerometer, is widely used in the Horizontal Directional Drilling machine in coal mines.
Zongwei Liu +4 more
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