Results 51 to 60 of about 19,345 (302)
Mechanism of Well Deviation in Air Drilling and Its Control
, 2010 Combined with actual air drilling practices and data in western China, mechanical behavior of three different BHA used in actual air drilling was investigated.
Zengxin Zhao, Deli Gao, Deshuai Zheng
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Numerical simulation of dust distribution and influencing factors in slope drilling
工程科学学报, 2015 To improve the situation of dust concentration exceeding during side slope drilling in an open-pit mine, according to the theories of gas-solid two-phase flow and gradient transportation, the dust movement, diffusion and sedimentation equations were ...
CHEN Ju-shi, JIANG Lan, JIANG Zhong-an
doaj +1 more source
Advanced Engineering Materials, EarlyView.This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele +2 more
wiley +1 more source
Measurement-while-drilling (MWD) development for air drilling [PDF]
, 1992 The objective of this program is to tool-harden and make commercially available an existing wireless MWD tool to reliably operate in an air, air-mist, or air-foam environment during Appalachian Basin oil and gas directional drilling operations in ...
Harrison, W. H. +2 more
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Compressed air operated drilling
, 2022 Date scanned: 2002-6-20.USBM #73571; Compressed air operated drilling platform for roof bolting.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Two miners operate a compressed air drill while ...
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Characterization and Performance of Minimum Quantity Lubricants in Through-Tool Drilling
International Journal of Engineering Materials and Manufacture, 2020 This study characterized airborne microdroplet diameters and size distribution from two commercially available lubricants A and B for internal minimum quantity lubrication (MQL).
Amla Patil +7 more
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A Dislocation Perspective on Strength and Toughness in Ceramics
Advanced Engineering Materials, EarlyView.Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
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Advanced Functional Materials, EarlyView.Multiscale experiments and modeling reveal how Ti3C2Tx MXene nanosheets reinforce PVDF nanocomposites. An optimal MXene loading (∼1 wt.%) nearly doubles tensile strength through efficient stress transfer, flake alignment, and crack‐deflection mechanisms, transforming ductile polymer behavior into a controlled multi‐stage fracture pathway which aligns ...
Bita Soltan Mohammadlou +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A compostable PGS soft surgical robot with interchangeable modules integrates transient Mo tactile and Si thermal sensors for dual feedback. The device preserves its function after clinical‐grade sterilization, demonstrates stable actuation and cardiac tissue grasping with real‐time in vivo pulsatile monitoring, and biodegrades post‐use with soil‐safe,
Minseong Chae +27 more
wiley +1 more source
Steerable percussion air drilling system [PDF]
, 1995 In the Steerable Percussion Air Drilling System (SPADS), air percussion is used to drill directionally in hard formations. Compared to mud or air powered PDM motors, SPADS offers directional drilling at high penetration rate, reduced mud costs ...
Gray, M.A., Oliver, M.S., Bui, H.D.
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