Results 91 to 100 of about 2,424 (251)
Research on Vibration Reduction and ROP Acceleration for Drilling in KOA Oilfield,Kazakhstan
Shiyou jixie, 2023 The KOA oilfield is located in the eastern margin of the Caspian Basin,Kazakhstan.The shallower Upper Permian of the oilfield is found with severe interbeding between sandstone and mudstone as well as interlayers of mudstone/slate and conglomerate.The ...
Wang Jianning +4 more
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On the group velocity of guided waves in drill strings
The Journal of the Acoustical Society of America, 2001 A key element to verify the drill-bit signal processing is the estimation of the time delay of the guided waves transmitted through the drill string from the bit to the surface. This delay can be measured from drill-bit vibrations or calculated using the mechanical properties of the drill string.
Poletto, Flavio, Carcione, José M.
openaire +3 more sources
And then there was us Et puis nous sommes apparus
Journal of the Royal Anthropological Institute, EarlyView.In 1987, the academic conference ‘Origins and Dispersals of Modern Humans: Behavioural and Biological Perspectives’ was held in Cambridge, UK. Subsequently referred to as the ‘Human Revolution’ conference, this meeting brought together the most prominent academics working in the field of human origins, including archaeologists and palaeoanthropologists,
Emma E. Bird +2 more
wiley +1 more source
History, EarlyView.Abstract In March 1976, around 2000 women from forty countries arrived at the Palais des Congrès in Brussels to participate in the first International Tribunal on Crimes Against Women. Explicitly positioning themselves against the United Nations‐led ‘International Year of the Woman’, the organizers and participants of the tribunal proclaimed a global ...
NIVEDITA JOON
wiley +1 more source
Bound by blood and bloodshed: Sibling ties and participation in genocidal violence
Criminology, EarlyView.Abstract Focusing on the 1994 genocide in Rwanda, we examine how sibling relationships—one of the most salient familial bonds—influence individual engagement in violence during mass atrocity. Drawing on an adaptation of differential association and social learning theories for contexts of mass atrocity, we analyze a novel dataset linking over 300,000 ...
Jack G. R. Wippell +3 more
wiley +1 more source
Analysis on the dynamics of flexible drillstring under different drilling parameters
Frontiers in Earth ScienceDuring the operation of the drill string, it displays a degree of flexibility. Simultaneously, its dynamic properties, influenced by complex stress conditions, manifest nonlinearity and uncertainty.
Jifei Cao +8 more
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Journal for Eighteenth-Century Studies, EarlyView.Abstract The final Stuart monarch, Queen Anne, has often been overlooked in studies of visual and material culture, particularly of fashion and dress. This article is the first to undertake a qualitative and quantitative analysis of the wardrobe accounts of Queen Anne, situating her consumption within the context of the eighteenth‐century fashion ...
Sarah A. Bendall
wiley +1 more source
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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On 3‐MMC: A Cathinone I Have Come to Know and Love
Anthropology of Consciousness, EarlyView.ABSTRACT This article attempts to complicate the mythology of a compound in a state of becoming. I will trace lightly its origins as a cultural disruptor and how I am implicated in this imperative. Introducing you to 3‐MMC will require multiple modes of storytelling and taking of liberties, drawing on literature reviews, practice‐based research, prose,
Carmen Ostrander
wiley +1 more source
Influence of Physical Parameters on Acoustic Transmission Characteristics of Drill String Channel
Shiyou jixie, 2019 The in-depth study of the transmission characteristics of sound waves in the drill string is of great significance for the development of sound transmission systems. The drill string is considered as pipeline composed of different uniform circular tubes.
Huang Mingquan, Zhao Guoshan, Tan Zhe
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