Results 111 to 120 of about 4,494 (274)
Drill Pipe Dynamic Measurements Provide Valuable Insight Into Drill String Dysfunctions
, 2011 Recently the oil and gas drilling industry has become increasingly interested in drilling dynamics and vibration as a cause of reduced drilling performance, downhole tool and drill string failures. Historically, vibration data has been captured by an MWD
Ryan Graham +2 more
core +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello +2 more
wiley +1 more source
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
doaj
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
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
doaj +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 Drill String Vibration Signal of Stick Slip and Bit Bouncing
, 2014 In drilling engineering, drill string premature damage are frequently observed, resulting in drilling cost and cycle prolonged. Researches show that, the common phenomenon of drill string vibration is the main cause of premature damage, thus more and ...
Huaigang, FU, Weiqing, QIU, Peili, LI
core +2 more sources
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