Results 31 to 40 of about 22,977 (217)

Dynamic Characteristics of Horizontal Drilling with Flexible Drill String Based on ABAQUS Explicit Dynamics

Shiyou jixie
During the drilling of ultrashort-radius radial horizontal well with flexible drill string， the vertical shift of wellbore trajectory affects the encountering rate of target points.
Liu Xin Huang Zhongwei Wu Xiaoguang Li Gensheng Shi Huaizhong Wang Jiarui Wang Minghao, Huang Zhongwei, Wu Xiaoguang, Li Gensheng, Shi Huaizhong, Wang Jiarui, Wang Minghao   +6 more
doaj   +3 more sources

A REVIEW OF DRILL STRING DYNAMICS AND MODELING TECHNIQUES

Facta Universitatis Series Automatic Control and Robotics
The complex dynamics of drill strings under various vibration modes during drilling operations present significant challenges to the oil and gas industry due to the high costs associated with oil well drilling.
Nora Benmir
semanticscholar   +1 more source

AI‐Assisted Engineering of Glycyrrhizic Acid/Simvastatin Nanocrystals for Multifunctional Treatment of Bacterial Osteomyelitis

Advanced Science, EarlyView.
Through AI‐assisted screening from FDA‐approved API to overcome the limitations of bacterial osteomyelitis treatment, glycyrrhizic acid and simvastatin are identified as a multifunctional combination capable of self‐assembling into mechanism‐targeting nanocrystals that effectively neutralize reactive oxygen species, suppress M1 macrophage polarization,
Yu Han, Yao Zhao, Chengbo Yang, Miao Niu, Jun Dai, Quanxin Ning, Kai Xiao, Jinzheng Liang, Wensheng Zhang, Liang Wang, Dan Shao, Dongsong Li   +11 more
wiley   +1 more source

Development of fully coupled deviated well drill string dynamics simulation model for fatigue and vibration analysis

Simulation (San Diego, Calif.)
Drilling is an expensive but necessary part of mining, geothermal and oil operations. The cost of drilling can be reduced using simulation models to optimize parameters and perform fatigue prognoses, expanding the useful life of downhole equipment ...
Sampath Liyanarachchi, Geoff Rideout
semanticscholar   +1 more source

Two‐Dimensional Materials for Flexible Neuromorphic Devices: Materials, Engineering Strategies, Architectures, and Emerging Applications

Advanced Electronic Materials, EarlyView.
This review explains how atomically thin materials can combine information storage, processing, and mechanical flexibility in neuromorphic devices. It connects material properties and engineering strategies with device architecture, synaptic behavior, and performance under bending.
Junzhe Tang, Letian Dai
wiley   +1 more source

LQR Control of Axial-Torsional Bidirectional Vibration of Drill String in Oil and Gas Wells

Shiyou jixie
To effectively solve the failure problem induced by axial-torsional bidirectional vibration of drill string， with the help of the 3-DOF dynamics model of drill pipe， a simulation study was performed on the suppression of linear quadratic regulator （LQR ...
Li Xinye, Zhang Wenbo, Guo Xiaoqiang, Zhang Wenxue, Ye Chengyang   +4 more
doaj   +3 more sources

Analysis on the dynamics of flexible drillstring under different drilling parameters

Frontiers in Earth Science
During 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, Jifei Cao, Deyong Zou, Qilong Xue, Jin Wang, Leilei Huang, Feng Guo, Chong Wang, Jun Qu   +8 more
doaj   +1 more source

Drill string dynamic characteristics simulation for the ultra-deep well drilling on the south margins of Junggar Basin

Petroleum, 2023
Improper drilling parameters may cause severe vibration of drill string which leads to reduce the rate of penetration and drilling tool premature failure accidents in the drilling process of ultra-deep well.
Yuan Li, Jianggang Shi, Minghu Nie, Chi Peng, Yingjie Wang   +4 more
doaj   +1 more source

Multiaxial fatigue with parametric uncertainties in axial-torsional drill-string dynamics

Journal of the Brazilian Society of Mechanical Sciences and Engineering
Uncontrolled drill-string vibrations can lead to loss of productivity, with fatigue failure being a major factor that can lead to the rupture of these structures.
Sandro C. Valente, Yuri B. S. Moralles, J. R. Brígido, R. Tobisawa, D. Castello, Thiago G. Ritto   +5 more
semanticscholar   +1 more source

A verification of the Cosserat rod implementation for drill-string dynamics under large displacement conditions

, 2020
A cantilever beam modelled as a Cosserat rod, subjected to an external eccentric load is studied as a means to verify the capability of the current implementation to handle large displacement conditions. It is shown that the present strategy based on the
H. Goicoechea, R. Lima, R. Sampaio, F. Buezas   +3 more
semanticscholar   +1 more source