Results 31 to 40 of about 188,421 (295)
Analysis of development framework of intelligent coal mine underground drilling technology
Gong-kuang zidonghua, 2020 Development and application of intelligent drilling tool and acquisition and analysis of drilling data are outstanding characteristics of intelligent underground drilling.
LI Quanxin, LIU Fei, FANG Ju
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Research and practice of high speed spiral compound drilling technology in complex weak coal seam
Meikuang Anquan, 2022 In view of the difficult problems of drilling and discharging slag and low hole forming rate in complex weak coal seam of Wangpo Coal Mine, the high speed spiral compound drilling technology is studied, and the performance characteristics of ZDY6000LR ...
LI Yingxi
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Thermo-mechanical stresses distribution on bone drilling: numerical and experimental procedures [PDF]
, 2017 In bone drilling, the temperature and the level of stresses at the bone tissue are function of the drilling parameters. If certain thresholds are exceeded, irreversible damages may occur on the bone tissue.
Fernandes, M.G.A. +2 more
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Energy Science & Engineering, 2023 Aiming at the application of hydraulic punching technology in soft, low permeability, and high gas coal seams in Changping Coal Mine, there are problems such as large workload, poor permeability enhancement effect, and the formation of “blank zones” in ...
Rui Min +4 more
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Applied Sciences, 2022 It is generally believed that core discing is a rock failure phenomenon under high in-situ stress, and high stress is closely related to the characteristics of core discing. The core drilling tests of intact granite were conducted on the laboratory servo-
Hua Tang +4 more
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Assessment of zonal isolation risk to changes in design parameters [PDF]
, 2017 The Well Containment Screening Tool (WCST) focuses on well integrity evaluation after well control incident. The WCST favors a greater wall thickness and, hence, a narrower cementing annulus, potentially increasing the risk of cement loss.
Zhang, Huidong, active 21st century
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Multi-objective cellular particle swarm optimization and RBF for drilling parameters optimization
Mathematical Biosciences and Engineering, 2019 Wellbore drilling parameters optimization is one of the most important issue in drilling engineering. Rate of penetration or mechanical specific energy was usually utilized as the optimization objective.
Jun Zheng, Zilong li, Bin Dou, Chao Lu
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Measurement of Nanoparticles Release during Drilling of Polymer Nanocomposites [PDF]
, 2015 Nanomaterials are one of the promising technologies of this century. The Project on Emerging Nanotechnologies [1] reports more than 1600 consumer products based on nanotechnology that are currently on the market and advantages link to the reinforcement ...
Abhyankar, Hrushikesh +4 more
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MachinesAiming at the problem that drilling parameters are difficult to adjust in time for the driller due to the complex geological environment in underground coal mines, a drilling parameter control method based on online identification of drillability and ...
Jianbo Dai +6 more
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Autonomous parameter optimization for femtosecond laser micro-drilling
Optics Express, 2021 There is a strong need for a highly efficient method to find the optimal conditions to achieve a desired result in laser processing, oftentimes from a multidimensional parameter space. In this study, we adopted Bayesian optimization as an efficient statistical optimization method robust to the inherent variations observed in typical laser processing ...
Keiichi Bamoto +3 more
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