Results 51 to 60 of about 584,502 (236)

Small‐Scale Magnetic Peristaltic Soft Robot With Mobility and Transport Capabilities

Advanced Intelligent Systems, EarlyView.
This study introduces a miniature, untethered soft magnetic microrobot with peristaltic capabilities for both locomotion and cargo transport. Eight helically magnetized elastomeric strips deform under rotating fields (10–80 mT, 1–5 Hz), enabling movement across rods and lumina at up to 4.1 body lengths min‐¹.
Mohammad Hasan Dad Ansari, Linda Paternò, Chenjun Wu, Veronica Iacovacci, Arianna Menciassi   +4 more
wiley   +1 more source

Simulation of the Drill String Vibration Signal System

Shiyou jixie, 2015
To understand the signal transmission processes and rules as well as the structure and components of signals inside the drill string,through establishing signal transmission model,a drill string vibration simulation software has been developed based on ...
宋一晨, 吕苗荣, 陆健
doaj  

Mechanical Modelling of Drill‐Strings [PDF]

PAMM, 2003
AbstractVibrations in long torsional strings result in spatio‐temporal dynamics. These vibrations disturb the accuracy of the drilling process and may cause damage due to fatigue. The high costs of drillings are the main motivation for the suppression of vibrations of the drill–string. In this paper a model for the drill string is proposed. In order to
E. Kreuzer, H. Struck
openaire   +1 more source

Quantitative Analysis and Modeling of Transient Cuttings Transport Impact on Drill String Mechanics in Extended Reach Drilling

Processes
Cuttings beds in horizontal wells significantly affect the frictional torque and drag along the drill string; however, their quantification and modeling have been relatively underexplored.
Jianbo Xiang, Xi Wang, Wenqiang Lou, Xueying Wang, Chi Zhao, Feifei Zhang   +5 more
semanticscholar   +1 more source

Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller

Italian National Conference on Sensors, 2022
Hydrocarbon exploration and production activities are guaranteed through various operations including the drilling process, which is realized by using rotary drilling systems. The process involves crushing the rock by rotating the drill bit along a drill
R. Riane, M. Z. Doghmane, M. Kidouche, K. Tee, Sofiane Djezzar   +4 more
semanticscholar   +1 more source

Artificial Intelligence for Advanced Functional Materials: Progress and Emerging Frontiers

Advanced Intelligent Systems, EarlyView.
Artificial intelligence is transforming the discovery of functional materials by linking synthesis, characterization, simulation, and design in unified workflows. Advances in machine learning, autonomous experimentation, and foundation models are accelerating innovation across energy, electronics, and biomedicine, while revealing new frontiers for ...
Cristiano Malica, Kostya S. Novoselov, Seongmin Kim, Yousung Jung, Silvana Botti, Miguel A. L. Marques, Tigany Zarrouk, Miguel A. Caro, Sanggyu Chong, Michele Ceriotti, Marivi Fernandez‐Serra, Sara Navarro‐Rodriguez, Aakash Ashok Naik, Janine George, Ömer Hasan Omar, Victor Trinquet, Gian‐Marco Rignanese, Andrey Ustyuzhanin, Sonia Conesa‐Boj, Juan Rojo, Minh‐Tuan Dau, Simon M.‐M. Dubois, Jean‐Christophe Charlier, Jose H. Garcia, Romain Gautier, Rachid Laref, Junfeng Qiao, Giovanni Pizzi, Nicola Marzari, Camilla Coletti, Antonio Rossi, Jean‐Lucas Uslu, Chiara Zanardi, Vincenzo Palermo, Wide Hogenhout, Natalia Konchakova, Peter Klein, Tejs Vegge, Stephan Roche   +38 more
wiley   +1 more source

Study on Rotor-Bearing System Vibration of Downhole Turbine Generator under Drill-String Excitation

Energies
Downhole turbine generators (DHTG) installed within drill-string are susceptible to internal and external excitation during the drilling process, causing significant dynamic loads on bearings, and thereby reducing the bearing’s service life.
Benchun Yao, Zhen Tian, Xu Zhan, Changyun Li, Hualong Yu   +4 more
semanticscholar   +1 more source

Hybrid Interval Type-2 Fuzzy PID+I Controller for a Multi-DOF Oilwell Drill-String System

IEEE Access, 2022
The control of multibody drill-string systems is not easy and designing such systems is considered challenging because of the difficulty in the dynamic analysis of its nonlinear characteristics and parametric uncertainties.
Abdelbaset Laib, B. Talbi, A. Krama, Mohamed Gharib   +3 more
semanticscholar   +1 more source

Development of Similarity Theory-based Horizontal Well Drill String Test Apparatus

Shiyou jixie, 2016
In order to conduct research on dynamic properties of drill string in the horizontal well,a horizontal well drill string test apparatus is developed based on parameter correspondence between test model and site prototype.The parameter correspondence is ...
Ren Fushen, Liu Jianhua, Li Yang, Wang Baojin   +3 more
doaj  

Investigation of kinetic energy dissipation characteristics of the drill string during rotary drilling in underground coal mines

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
In underground coal mine rotary drilling, rock-breaking energy is transmitted from the drill string to the drill bit. Nonlinear vibrations of the drill string within the borehole result in kinetic energy dissipation.
Shuhan Shi, Qingfeng Wang, Wei Jiang, Peng Chen, Yang Liu, Jingping Yang, Kun Xu, Hang Chen   +7 more
doaj   +1 more source