Results 71 to 80 of about 69,255 (297)

Development of drilling optimization models for autonomous rotary drilling systems

, 2023
The growing global energy demand and strict environmental policies motivate the use of technology and performance improvement techniques in drilling operations. Traditional drilling methods depend on the effectiveness of the human-driller in the management of operating parameters to improve system performance.
openaire   +2 more sources

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

Optimization Drilling Parameters Performance During Drilling in Gas Wells [PDF]

International Journal of Oil, Gas and Coal Engineering, 2017
The objective of the present work is to optimize drilling parameters such as WOB, ROP, RPM, flow rate and drill diameter of hole. The research contribution to investigation and analysis field data. This paper focuses on the optimization of drilling parameters.
openaire   +1 more source

Through Diamond Robust Surface Enhanced Raman Spectroscopy

Advanced Functional Materials, EarlyView.
Thin film diamond growth offers a unique opportunity for Surface Enhanced Raman Spectroscopy (SERS); the encapsulation of plasmonic nanostructures within a transparent, chemically stable, and physically robust coating. The diamond acts as both a window and protective layer, enabling illumination of the plasmonic nanostructures through the diamond ...
Kieran N. Twaddle, Rebecca J. Watkins, Ralph J. Moors, Massimiliano L.A. Ramsay, Richard B. Jackman   +4 more
wiley   +1 more source

Research and application of drilling technology for grouting transformation in coal mine strata——Taking Huainan Zhangji Mine as an example [PDF]

E3S Web of Conferences
In order to solve the problem of water disaster in coal mining and realize the safe mining of working face, the drilling technology of grouting reconstruction in coal mine strata is studied, and the key parameters in grouting construction are optimized ...
Liu Wenwu, Guo Kun, Li Chao, Wang Yuchao
doaj   +1 more source

Integration of Low‐Voltage Nanoscale MoS2 Memristors on CMOS Microchips

Advanced Functional Materials, EarlyView.
This article presents the first monolithic integration of nanoscale MoS2‐based memristors into the back‐end‐of‐line of foundry‐fabricated CMOS microchips in a one‐transistor‐one‐resistor (1T1R) architecture. The MoS2‐based 1T1R cells exhibit forming‐free, nonvolatile resistive switching with ultra‐low operating voltages, low cycle‐to‐cycle variability ...
Jimin Lee, Sofía Cruces, Xiaohua Liu, Yang Chen, Vasilis A. Maroufidis, Janghyun Jo, Lukas Völkel, Dennis Braun, Michael Möller, Leon Brackmann, Holger Kalisch, Michael Heuken, Andrei Vescan, Rafal E. Dunin‐Borkowski, Joachim Mayer, Stefan Wiefels, Max C. Lemme   +16 more
wiley   +1 more source

The Complex Wellbore Trajectory Control Torque Optimization Based on NPSO Algorithm

Shiyou jixie, 2017
Considering the multi-variables and complex constrain conditions of the complex well trajectory optimization, a new particle swarm optimization (NPSO)algorithm is designed to improve the accuracy and optimization speed of complex wellbore trajectory ...
Sha Linxiu, Pan Zhongqi
doaj  

Real-time automatic identification methods for downhole whirling based on mechanical specific energy model of drill bit

Science and Technology for Energy Transition
In the drilling exploitation of hot dry rock for geothermal energy, whirling is one of the main low-efficiency conditions that affect the efficiency of Polycrystalline Diamond Compact (PDC) bit in horizontal well drilling.
Song Weiqiang, Mu Huidong, Yu Haiyang, Zhao Guangzhi, Kong Lulin, Sun Xue, Sun Zhiwei   +6 more
doaj   +1 more source

Sequence Mining and Pattern Analysis in Drilling Reports with Deep Natural Language Processing

, 2017
Drilling activities in the oil and gas industry have been reported over decades for thousands of wells on a daily basis, yet the analysis of this text at large-scale for information retrieval, sequence mining, and pattern analysis is very challenging ...
Hoffimann, Júlio, Mao, Youli, Taylor, Aimee, Wesley, Avinash   +3 more
core   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source