Results 71 to 80 of about 3,418,514 (199)
Drill-string nonlinear dynamics accounting for the drilling fluid
, 2009 International audienceThe influence of the drilling fluid (or mud) on the drill-string dynamics is analyzed in this paper. Usually the presence of the fluid is not taken into account in the analysis of the nonlinear dynamics of a drill-string. The aim of
Ritto, T.G. +2 more
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Influences of Excitation Force Forms of the Hydraulic Oscillator on Drag Reduction Efficiency
Shiyou jixie, 2023 The excitation force forms of the hydraulic oscillator have been rarely reported.Considering the nonlinear effect of frictional forces, a dynamics model of the drill string equipped with the hydraulic oscillator was built by introducing the initial ...
Shi Xiaolei, Huang Wenjun, Gao Deli
doaj
Sustainable Development, EarlyView.ABSTRACT The idea of “decarbonized oil” has become increasingly visible in climate, energy, and corporate transition debates as oil and gas actors seek to reconcile continued fossil fuel production with net‐zero commitments. This article offers a critical narrative review of the concept, asking what political work the idea of decarbonized oil performs ...
Jacob Kwakye
wiley +1 more source
Study on Fatigue Life of BHA based on Drill String Dynamics
Shiyou jixie, 2022 The bottom hole assembly(BHA)is prone to fatigue failure due to long-term severe vibration in the wellbore.Most studies use the differential equation to calculate the fatigue life of BHA,which has a large difference from the actual working conditions on ...
Mao Liangjie +3 more
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Smart Molecules, EarlyView.A 3D‐bioprinted platform with stem cells activates “nerve‐bone” signaling by enabling the spatiotemporal delivery of Nell‐1. This activation enhances neurovascular and bone regeneration through the CYFIP1 cascade. In rat calvarial defects, the platform doubled bone regeneration and nerve repair and tripled vascular density, resulting in superior ...
Minjia Zhu +11 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT This paper presents a comprehensive review of live‐line work on high‐voltage transmission overhead lines, with a focus on insulation performance, air‐gap breakdown and discharge physics under realistic operating conditions. This review primarily covers journal publications from approximately 2014 to 2026, with emphasis on recent developments ...
Mona Ghassemi, Masoud Farzaneh
wiley +1 more source
Influence of deformation parameters on drill string dynamics [PDF]
, 2020 Purpose. Identifying the causes of additional energy consumption for deformation of the drill string. Methodology. The study was conducted by analyzing the causes of deformations and justifying their impact on the dynamic parameters of the drill ...
Grydzhuk, Jaroslav, Chudyk, Igor
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Integrating large mammalian herbivores into Dynamic Global Vegetation Models: Status and next steps
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Zoogeochemistry, the study of how animals influence elemental cycling within ecosystems, bridges the fields of zoology, ecology and biogeochemistry. Yet, most terrestrial ecosystem models, especially Dynamic Global Vegetation Models (DGVMs), remain largely plant‐centric
Yue Cheng +10 more
wiley +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Food and alcohol indulgence, along with tea‐drinking, gambling, and gossip, are integral to a characteristically Sichuanese ethos of ‘life enjoyment’ (xiangshou shenghuo). Beyond mere pleasure, sensory, ludic, and comic experiences temporarily strip participants of both their formal and subjective qualities.
Angel Nayden
wiley +1 more source
Qualification of a computer program for drill string dynamics
, 1985 A four point plan for the qualification of the GEODYN drill string dynamics computer program is described. The qualification plan investigates both modal response and transient response of a short drill string subjected to simulated cutting loads applied
Carne, T. G. +2 more
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