Results 51 to 60 of about 80,069 (363)

An Improvement in Thermal and Rheological Properties of Water-based Drilling Fluids Using Multiwall Carbon Nanotube (MWCNT) [PDF]

Iranian Journal of Oil & Gas Science and Technology, 2012
Designing drilling fluids for drilling in deep gas reservoirs and geothermal wells is a major challenge. Cooling drilling fluids and preparing stable mud with high thermal conductivity are of great concern. Drilling nanofluids, i.e.
Mostafa Sedaghatzadeh, Abbasali Khodadadi, Mohammad reza Tahmasebi birgani   +2 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Змащувальні добавки та їх вплив на функціональні властивості бурових рідин [PDF]

, 2011
Наведена коротка характеристика різного виду змащувальних добавок до бурових рідин, описано їх властивості, вплив на фізико-хімічні та функціональні властивості бурових рідин, шляхи їх розвитку та області використання.
Бакулін, Є. М., Драганчук, О. Т., Процишин, В. Т.   +2 more
core  

Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]

, 2020
© The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M., Marschall, Horst R., Walters, Jesse B.   +2 more
core   +1 more source

Preparation and Properties of Reversible Emulsion Drilling Fluid Stabilized by Modified Nanocrystalline Cellulose

Molecules
Reversible emulsion drilling fluids can concentrate the advantages of water-based drilling fluids and oil-based drilling fluids. Most of the existing reversible emulsion drilling fluid systems are surfactant-based emulsifier systems, which have the ...
Fei Liu, Yongfei Li, Xuewu Wang, Zhizeng Xia   +3 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Enhancing pyrolysis efficiency of oil sludge with coconut shell insights into hydrocarbon recovery and heavy metal stabilization

Scientific Reports
This study investigates the effect of coconut shell (CS) addition on the pyrolysis behavior of oil sludge (OS) through co-pyrolysis experiments using bottom sludge from an oil refinery in Sichuan Province, China.
Mao-Ren Wang, Mao-Qi Liao, Xin Bai, Yu-Cheng Liu   +3 more
doaj   +1 more source

Developing a complex of high-alkaline of drilling process fluids formulations to well construction under conditions of hydrogen sulfide aggression

Известия высших учебных заведений: Нефть и газ, 2022
Drilling and fastening of wells in hydrogen sulfide-containing highly permeable rocks is often accompanied by concomitant complications, such as absorptions of various intensities and differential sticking of the drilling tool, and with a decrease in ...
S. V. Kamenskikh
doaj   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source