Results 111 to 120 of about 5,119,526 (356)

Intelligent recognition method for drilling conditions of deep formation based on LSTM neural network

Discover Applied Sciences
Deep formation drilling is characterized by high investment and risk. Real-time identification of drilling conditions is fundamental and prerequisite for improving drilling efficiency and reducing complex incidents.
Le Jiao, Ping Du, Yuan Yang, Xinxin Fang
doaj   +1 more source

Some aspects of operational reliability of the drill string and its components in well construction process [PDF]

, 2013
The paper considers operational efficiency of the well deepening procedure based on the probable drilling performance and the state of drill string components.
Hohol, V. I., Ohorodnikov, P. I., Svitlytskyi, V. M.   +2 more
core  

Intrabandgap States Engineering in Functionalized Nanodiamond to Generate Solvated Electrons for Photocatalysis Under Solar Illumination

Advanced Functional Materials, EarlyView.
The negative electron affinity of diamond allows to emit highly reductive electrons. By introducing intra‐bandgap states and an optimized electron transfer mechanism by surface functionalization with Ru(bpy)3, the formation of solvated electrons is achieved upon solar irradiation.
Benjamin Kiendl, Arsène Chemin, Adam H. Day, Rocio B. Rodriguez, Sneha Choudhury, Franziska Buchner, Kaan Atak, Christoph Merschjann, Emina Hadzifejzovic, Tim D. W. Claridge, Karin Larsson, Amélie Venerosy, Mailis M. Lounasvuori, Natalia Zabarska, Boyan Iliev, Thomas J. S. Schubert, Hugues A. Girard, Jean‐Charles Arnault, John S. Foord, Tristan Petit, Anke Krueger   +20 more
wiley   +1 more source

Key Technologies and Efficiency Improvement Analysis of Four-joint Stand Drilling Rig

Shiyou jixie, 2018
Four-joint stand drilling rig adopts four-joint stand drilling modes to improve comprehensive drilling operation efficiency by lengthening the stand, reducing the frequency of tripping, and increasing the stand running speed.
Xu Xiaopeng, Wang Dingya, Deng Yong, Wang Shijun, Zhang Youhui   +4 more
doaj  

Analysis of the efficiency of telemetric systems for drilling wells

IOP Conference Series: Materials Science and Engineering, 2019
For efficient control of well drilling, it is necessary to know actual drilling conditions, parameters of the trajectory of previously drilled wells, to predict the trajectory of a new part of the well bottom, to know technological parameters in the ...
L. Z. Zainagalina, L. V. Petrova, V. Petrov   +2 more
semanticscholar   +1 more source

Cold Quad‐Modal Nanocomplex for Precise and Quantitative In Vivo Stem Cell Tracking

Advanced Functional Materials, EarlyView.
Multimodal albumin–bismuth sulfide–superparamagnetic iron oxide (ABS) nanocomplexes are developed for stem cell tracking across four different imaging modalities: MRI, MPI, MSOT, and CT. Combining its flexibility with high sensitivity, this quad‐modal imaging agent enables a robust quantification of ABS‐labeled stem cells in vivo.
Ali Shakeri‐Zadeh, Chao Wang, Shreyas Kuddannaya, Saleem Yousf, Jeff W. M. Bulte   +4 more
wiley   +1 more source

All‐Aqueous Pullulan Fibers Enabling Visible‐to‐Near‐Infrared Waveguiding with Mechanical and Thermal Resilience

Advanced Functional Materials, EarlyView.
Pullulan, a biomass‐derived polysaccharide, is transformed into transparent optical fibers using a solvent‐free borax hydrogel‐spinning method. The fibers outperform PMMA with ≈200 MPa tensile strength and 200 °C stability, while uniquely guiding visible‐to‐NIR light and enabling additive‐free humidity sensing.
Yuya Fukata, Aayush Kumar Jaiswal, Ari Hokkanen, Hannes Orelma, Tadahisa Iwata   +4 more
wiley   +1 more source

Study of high-frequency impact extrusion bionic drilling technology for soft coal seams

Frontiers in Earth Science
Soft coal seams represent a common geological feature in coal and gas outburst mines. They generate a substantial amount of coal debris during gas extraction drilling, which easily causes hole blockage and leads to drilling hazards such as pipe sticking,
Hongjie Tian, Hongjie Tian, Dongzhuang Tian, Dongzhuang Tian, Zaixu Chen   +4 more
doaj   +1 more source

Coherent Control of Nitrogen Nuclear Spins via the VB−${\rm V}_B^-$‐Center in Hexagonal Boron Nitride

Advanced Functional Materials, EarlyView.
This study demonstrates coherent control of 15N nuclear spins coupled to VB−${\text{V}}_{\text{B}}^{-}$ centers in isotope‐enriched hexagonal boron nitride. Selective addressing via spin‐state mixing enables Rabi driving, quantum gates, and coherence times exceeding 10 μs$\umu{\rm s}$.
Adalbert Tibiássy, Charlie J. Patrickson, Thomas Poirier, James H. Edgar, Bruno Lopez‐Rodriguez, Viktor Ivády, Isaac J. Luxmoore   +6 more
wiley   +1 more source

Transportation patterns of drilling cuttings and application using the internal row drilling cuttings method in rockburst mines

矿业科学学报
This study proposes an internal discharge drilling cuttings method and corresponding drilling tools as a solution to inaccurate collection of drilling cuttings in existing drilling cuttings methods.
LU Fangqing, CUI Lei, PAN Ji'an, GAO Xuepeng, PAN Yishan   +4 more
doaj   +1 more source