Results 151 to 160 of about 4,494 (274)

Drill-string dynamics coupled with the drilling fluid dynamics

, 2009
A drill-string is a slender structure that turns and drills into the rock in search of oil. A numerical model is developed using the Timoshenko beam theory and approximated by means of the Finite Element Method. The aim this work is to investigate the influence of the drilling fluid in the dynamics of the drill-string.
Ritto, T.G., Sampaio, R., Soize, Christian   +2 more
openaire   +1 more source

Experimental Study on Compensation Function of 180 t Drill String Heave Compensation Device

Shiyou jixie, 2018
In order to verify whether the compensation performance of the 180 t main and passive combined drill string heave compensation device meets the design requirements, a compensation function test stand using reverse test method was developed.
Huang Ping, Liu Hongliang, Feng Xuhua, Lei Guangjin, Zhang Caiying   +4 more
doaj  

Involvement in daily life activities from the perspectives of children and young people with childhood‐onset disabilities: A scoping review

Developmental Medicine &Child Neurology, EarlyView.
This scoping review aimed to understand the construct ‘involvement’ in daily life activities from the perspective of children and young people with childhood‐onset disabilities. We identified six conceptual ideas, including a continuum of inner dedication or investment in‐the‐moment, and five others reflecting how children and young people process ...
Vera C Kaelin, Kinga Quaaden, Helena Lindgren, Mats Granlund, Christine Imms   +4 more
wiley   +1 more source

Demonstration of a High‐Resolution Passive Profiler for Characterizing the Distribution of PFAS in Groundwater: A Comparison of Methods in the Field

Groundwater Monitoring &Remediation, EarlyView.
Abstract Characterizing the concentration and mass flux spatial distributions at sites with complex hydrogeologic conditions is critical to evaluate the fate and transport of contaminants, as well as to design effective remediation programs. PFAS (per‐ and polyfluoroalkyl substances)‐contaminated sites are even more complex due to the large number of ...
Morgan Eldridge, Jessica LaFond, Micaela Vavra, Graig Lavorgna, David Lippincott, Paul Hatzinger, Jennifer Guelfo, Todd Anderson, W. Andrew Jackson   +8 more
wiley   +1 more source

Pre‐Task Explicit Instruction, Input Modality, and Working Memory in L2 Oral Self‐Repair

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Despite the central role of tasks in language education and ensuing research documenting how task‐related variables might affect language performance and learning, it remains unclear whether pre‐task explicit instruction, input modality, and working memory (WM) influence how learners monitor and repair grammatical structures in real‐time ...
Reza Yadollahpour, Mostafa Pourhaji, Michael Sadeghi   +2 more
wiley   +1 more source

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

Living in the Mycelial World

Topics in Cognitive Science, EarlyView.
Abstract This manuscript documents a systematic ethnomycological analysis of ethnographic archives. Focusing on texts describing human–fungi interactions, I conduct a global, cross‐cultural review of mushroom use, covering 193 societies worldwide. The study reveals diverse mushroom‐related cultural practices, emphasizing the significance of fungi ...
Roope O. Kaaronen
wiley   +1 more source

An integrated geomechanical-drill string trajectory optimization method for initial wellbore design. [PDF]

Sci Rep
Guo S, Liu Z, Su X, Liu Y, Li Q, Wang L, Qu F.   +6 more
europepmc   +1 more source

Study on a Mechanical Semi-Active Heave Compensation System of Drill String for Use on Floating Drilling Platform. [PDF]

PLoS One, 2015
Liu Q, Tang Y, Huang C, Xie C.
europepmc   +1 more source

Bret/BRAT

Critical Quarterly, EarlyView.
Nicholas Smart
wiley   +1 more source