Results 51 to 60 of about 3,418,514 (199)
Advances in Mechanical Engineering, 2019 Stick–slip vibration is common in the oil well drilling process and is detrimental to down-hole equipment and drilling efficiency. In recent years, a new type of drilling technology, torsional impact drilling, has been developed to mitigate the stick ...
Liping Tang, Wei He, Xiaohua Zhu
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Carbon Energy, EarlyView.Replacing the oxygen evolution reaction with the electro‐oxidation of pollutants and waste streams offers an energy‐efficient route for simultaneous hydrogen production and pollutant remediation. This review summarizes the reaction mechanisms, catalyst design principles, and emerging paired‐electrolysis strategies that govern activity, selectivity ...
Safa Al‐Yahyaey +4 more
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Tensions Behind the Trade: How Divergent Service Preferences Shape Peer‐To‐Peer Sharing Choices
Corporate Social Responsibility and Environmental Management, EarlyView.ABSTRACT The landscape of ‘sharing’ services encompasses services ranging from access‐based services (car sharing) to peer‐to‐peer sharing platforms (Couchsurfing). These services differ in the levels of exchange and altruism, creating conflicting consumer motivations.
Vivian S. C. Tunn +2 more
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Chaotic Vibration Analysis of the Bottom Rotating Drill String
Shock and Vibration, 2014 Drill string vibration is a widely studied topic. This paper developed a real-time measurement system near the drilling bit and extracted the lateral vibration, longitudinal vibration time series of bottom rotating drill string.
Qilong Xue +3 more
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Deep Underground Science and Engineering, EarlyView.This paper presents temporal and adaptive‐frequency network with MixStyle (TAMNet), a deep time‐series modeling framework for accurate and robust multi‐well oil productivity forecasting. TAMNet integrates transformer and long short‐term memory architectures to capture both short‐ and long‐term temporal dependencies, enhanced by a temporal gate unit ...
Chunxi Yang +6 more
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Suppression of Drill-String Stick-Slip Vibration
MATEC Web of Conferences, 2018 We investigate experimentally and numerically suppression of drill-string torsional vibration while drilling by using a sliding mode control. The experiments are conducted on the novel experimental drilling rig developed at the University of Aberdeen [1]
Vaziri Vahid +2 more
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Perovskite/silicon tandem solar cells offer efficiencies beyond 30%, yet conventional architectures face trade‐offs between optical performance and current matching. Three‐terminal tandems employing silicon back‐contact bottom cells eliminate the current‐matching constraint while minimizing optical losses, offering superior energy yield under real ...
Yunhao Fan +4 more
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Applied SciencesWith the unconventional energy sector (e.g., shale gas) increasingly focused on precision drilling and cost-effective extraction, slim-hole horizontal well technology is gaining prominence.
Xikun Gao +6 more
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Valence Asymmetries of Traits in Dating Contexts
European Journal of Social Psychology, EarlyView.ABSTRACT Research on traits in dating contexts has typically focused on trait content. We instead examined structural differences in trait frequency and similarity. Prior work suggests that positive information is more frequent, whereas negative information is more diverse and less similar.
Tabea J. Zorn, Christian Unkelbach
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Reaming While Drilling Drillstring Structure Optimization and Application Performance Evaluation
Shiyou jixie, 2016 The reaming tool BHA is the most important controllable factor during reaming while drilling operations,whereas the irrational drill string structure could lead to intensified drill string vibration.In view of this,the drill string-formation finite ...
Zhang Qiang, Fu Jianhong, Li Haoran
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