Results 21 to 30 of about 80,069 (363)

Soluble pozzolanic materials from coal bottom ash as cement replacement material [PDF]

open access: yes, 2021
Nowadays, intensive research in production of highly reactive pozzolanic materials from industrial waste to replace cement is crucial. This action expected to increase industrial waste recycling rate and at the same time reduce extraction of non ...
Abd Wahab, Azrina   +3 more
core   +1 more source

Systematic experimental study of the temperature dependence of viscosity and rheological behavior of water-based drilling fluids with nano-additives

open access: yesPetroleum, 2023
The paper presents the results of a systematic study of the influence of nano-additives of various concentrations, average sizes and composition on the temperature dependence of the viscosity and rheological behavior of water-based drilling fluids ...
A.V. Minakov   +3 more
doaj   +1 more source

Synthesis of Oligomeric Silicone Surfactant and its Interfacial Properties

open access: yesApplied Sciences, 2019
During the exploitation of low permeability gas-condensate reservoirs, the mud filtrate, acidizing liquid, and fracturing fluid invade the reservoir and condensate gas, severely reducing the permeability of the reservoirs due to increased capillary ...
Da Yin   +6 more
doaj   +1 more source

Mechanical properties and damage constitutive model of mud shale under different drilling fluids immersion

open access: yesMeitan kexue jishu, 2023
In the process of shale oil and gas drilling, the long-term erosion and weakening of drilling fluids promotes the extension and expansion of micro-fractures on mud shale, which leads to the reduction of rock mass strength and seriously threatens the ...
Diandong GENG   +4 more
doaj   +1 more source

Experimental investigation of new additive to optimize the properties of synthetic-based drilling fluid [PDF]

open access: yesJournal of Mining and Metallurgy. Section A: Mining, 2016
This paper focus on the design, development and testing two type of synthetic based drilling fluid include of amine-treated Quebracho agent and Polymeric Fluid Loss agent.
Daya Ali Akbar   +2 more
doaj   +1 more source

Rapid RAFT Polymerization of Acrylamide with High Conversion

open access: yesMolecules, 2023
Rapid RAFT polymerization can significantly improve production efficiency of PAM with designed molecular structure. This study shows that ideal Reversible Addition–Fragmentation Chain Transfer (RAFT) polymerization of acrylamide is achieved in dimethyl ...
Xuejing Liu   +4 more
doaj   +1 more source

Sea-floor tectonics and submarine hydrothermal systems [PDF]

open access: yes, 2005
The discovery of metal-depositing hot springs on the sea floor, and especially their link to chemosynthetic life, was among the most compelling and significant scientific advances of the twentieth century. More than 300 sites of hydrothermal activity and
de Ronde, Cornell D. J.   +2 more
core   +1 more source

Applicability of Fe3O4 nanoparticles for improving rheological and filtration properties of bentonite-water drilling fluids in the presence of sodium, calcium, and magnesium chlorides

open access: yesJournal of Petroleum Exploration and Production Technology, 2020
There are impressive efforts in conjunction with improving rheological and filtration properties of Water-Based Drilling Fluids (WBDFs) employing Nano-Particles (NPs).
Alireza Rezaei   +2 more
doaj   +1 more source

Assessment of Cutting and Drilling Mud Heavy Metals and Organic Matter Contamination Using Limit Learning Regression Algorithm Technique of Artificial Intelligence in one of the Oil Fields of Southern Iran [PDF]

open access: yesعلوم محیطی, 2023
Introduction: The process of extraction and exploitation of oil and gas resources requires the cycle of production, sending, and recycling of drilling mud or drilling fluid, so achieving the right combination of drilling mud and its recycling is an ...
Saeid Ahadi   +4 more
doaj   +1 more source

Modelling of deep wells thermal modes [PDF]

open access: yes, 2019
Purpose. Investigation of various heat-exchange conditions influence of the tower liquid on the deep wells thermal conditions. Methods. Methods of heat-exchange processes mathematical modeling are used.
Blyuss, B   +4 more
core   +1 more source

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