Results 41 to 50 of about 13,384 (264)
A Novel Terpolymer as Fluid Loss Additive for Oil Well Cement
International Journal of Polymer Science, 2017 A terpolymer comprised of sodium styrene sulfonate (SSS), fumaric acid (FA), and acrylamide (AM) was synthesized by aqueous free radical copolymerization and evaluated as fluid loss additive for oil well cement.
Ming Li +4 more
doaj +1 more source
Natural Gas Industry B, 2019 Strength retrogression of cement stone is one of the major challenges in oil well cementing under high temperatures. Nano-SiO2 exhibits the potential to mitigate this problem, but there is lack of reports about the role of nano-SiO2 playing within cement
Chengwen Wang +5 more
doaj +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT This study employs hierarchical regression modelling on a survey of 550 firms from Nigeria and Ghana to examine the impact of sustainability auditing on corporate governance, environmental performance, and financial outcomes of high‐impact industries.
Mandella Osei‐Assibey Bonsu +3 more
wiley +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT Given the growing pressure on companies to achieve high ESG performance while minimising ESG controversies, this study investigates how ESG performance and ESG controversies jointly affect firm financial performance (measured as ROA and ROE), considering the effect of the presence of women directors and of operating in controversial versus non‐
Alice Alosi, Emilia Filippi
wiley +1 more source
Nanorubber-modified cement system for oil and gas well cementing application
Journal of Natural Gas Science and Engineering, 2017 Abstract Flexible cement systems with low shrinkage are more capable than the conventional cement systems to withstand the tensile stresses generated by fluctuation of temperature and pressure in oil and gas wells. In this work nanorubber particles (NR), stable at high temperature and in alkaline environment, were incorporated into a cement system ...
Narjes Jafariesfad +3 more
openaire +2 more sources
Perigraftitis, an independent biologic complication associated with implants placed in grafted bone
Clinical Advances in Periodontics, EarlyView.Abstract Background Perigraftitis is a recently introduced concept describing biologic complications specifically associated with implants placed in grafted bone. It is characterized by inflammation resulting from bacterial colonization of grafted bone and/or residual graft particulates.
Jonathan H. Do +2 more
wiley +1 more source
Synergistic Effect of Latex Powder and Rubber on the Properties of Oil Well Cement-Based Composites
Advances in Materials Science and Engineering, 2018 The brittleness and the poor resistance to external load of oil well cement impede the development of oil and gas wells. To overcome these deficiencies, latex powder or rubber and their hybrid combinations were used to modify the oil well cement.
Jianjian Song +4 more
doaj +1 more source
A Review of Rheological Modeling of Cement Slurry in Oil Well Applications
Energies, 2020 The rheological behavior of cement slurries is important in trying to prevent and eliminate gas-migration related problems in oil well applications. In this paper, we review the constitutive modeling of cement slurries/pastes. Cement slurries, in general,
Chengcheng Tao +3 more
doaj +1 more source
Carbon Energy, EarlyView.Solvent washing of coffee‐ground hydrochars produces activated carbons with tunable pore sizes while maintaining surface area. Removing non‐polar contaminants enhances microporosity, increasing CO2 uptake by 40%. Moderate pore sizes (9–12 Å) yield optimal CO2:N2 selectivity, whereas smaller pores reduce selectivity due to stronger interactions between ...
Muhammad Irfan Maulana Kusdhany +4 more
wiley +1 more source
Materials Research ExpressComplex oil and gas wells often experience complex stresses underground during the extraction process, which can easily cause damage to the cement paste.
Hui Zhang, Chengwen Wang
doaj +1 more source