Results 61 to 70 of about 5,423 (259)
Energies, 2018 The lower rate of penetration (ROP) is one of the key technical difficulties during drilling of shale reservoirs. Percussive-rotary drilling (PRD) is crucial for increasing ROP.
Guangjian Dong, Ping Chen
doaj +1 more source
International Forum of Allergy &Rhinology, EarlyView.Key Points Zygomaticotemporal (ZTN) and lacrimal nerves (LN) both carried sympathetics and parasympathetics ZTNs had more parasympathetics than LNs, but markers varied significantly within and between nerves LN parasympathetics to the lacrimal gland may mitigate dry eye after vidian ...
Bushra Rahman +8 more
wiley +1 more source
Exposure-response relationship between hand-arm vibration exposure and vibrotactile thresholds among rock drill operators: a 4-year cohort study. [PDF]
Occup Environ Med, 2022 Clemm T +4 more
europepmc +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Healthcare derived polystyrene waste represents a growing and under addressed fraction of plastic waste streams due to contamination risks and limited recyclability. This study aims to investigate the valorization of waste polystyrene foam through catalytic and noncatalytic pyrolysis pathways to evaluate product yield distribution and identify
Salman Khan +4 more
wiley +1 more source
ModellingThis paper presents a simulation-based artificial neural network (ANN) model to predict bit-rock interaction forces during drilling. Drill string vibration poses a significant challenge in the oil, gas, and geothermal industries, leading to non ...
Sampath Liyanarachchi, Geoff Rideout
doaj +1 more source
Hand-Arm Vibration Exposure in Rock Drill Workers: A Comparison between Measurements with Hand-Attached and Tool-Attached Accelerometers. [PDF]
Ann Work Expo Health, 2021 Clemm T +4 more
europepmc +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT This study carries significant consequences in various engineering applications, such as cooling rotating disk surfaces, improving chemical reactor performance, and designing filtration systems. Considering these main applications in view, the aim of this study is to investigate time‐dependent Casson hybrid nanofluid flow on a permeable ...
Ebrahem A. Algehyne +6 more
wiley +1 more source
Design of cavity drill bit while drilling for gas drainage of crossing borehole
Gong-kuang zidonghua, 2019 In order to improve gas drainage effect of crossing borehole, cavity drilling technology is often used to increase part borehole diameter of coal seam section, which avoids invalid footage of hole section in rock layer.
GAO Xiaoliang +2 more
doaj +1 more source