Results 1 to 10 of about 384,829 (203)

Thickening Time and Compressive Strength Correlations for Bentonitic- Class "G" Cement Slurries

open access: yesIraqi Journal of Chemical and Petroleum Engineering, 2012
Empirical equations for estimating thickening time and compressive strength of bentonitic - class "G" cement slurries were derived as a function of water to cement ratio and apparent viscosity (for any ratios).
Riyadh Hazim Fawzi
doaj   +2 more sources

Influence of Metakaolin and nano-clay on compressive strength and thickening time of class G oil well cement [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2021
In this research, the Compressive Strength (CS) and Thickening Time (TT) of oil well cement with different Metakaolin (MK) dosages was evaluated in the presence of Nanoclay (NC). The experiments followed a randomized BoxBehnken Design (BBD) using 5 - 15
Akeem Olatunde Arinkoola   +8 more
doaj   +1 more source

Optimization of Cement–Rubber Composites for Eco-Sustainable Well Completion: Rheological, Mechanical, Petrophysical, and Creep Properties

open access: yesEnergies, 2022
To ensure well integrity, wellbore must be strongly cased using durable cement slurries with essential additives during downhole completion. The rubber materials that come from industrial waste are becoming extremely encouraged in the use as an additive ...
Abdennour C. Seibi   +3 more
doaj   +1 more source

Effects of Hydroxycarboxylic Acid-Based Retarder on the Compressive Strength of Geopolymer Cement under Wellbore Conditions

open access: yesEngineering Proceedings, 2023
In oil well cementing, cement must flow through the casing before reaching the targeted annulus; hence, a retarder must be added to provide the cement with sufficient time to reach the targeted depth before setting.
Nurul Nazmin Zulkarnain   +4 more
doaj   +1 more source

AN IMPROVEMENT TO PHYSICAL PROPERTIES OF HEAVY-WEIGHT OIL WELL CEMENTS USING CARBON NANOTUBES [PDF]

open access: yesJournal of Petroleum Science and Technology, 2014
This study experimentally investigates the effect of multi-walled carbon nanotubes (MWNT’s), as a reinforcing material, on the physical properties of heavy-weight oil well cements. A candidate well is selected and the properties of the cement slurry used
Ali Ghajari   +2 more
doaj   +1 more source

Prognostic value of gallbladder wall thickening in patients with acute hepatitis A [PDF]

open access: yesUltrasonography, 2015
Purpose: To investigate the clinical significance of gallbladder (GB) wall thickening frequently observed in patients with acute hepatitis A. Methods: A total of 328 consecutive patients who were diagnosed with acute hepatitis A and underwent abdominal ...
Jhii-Hyun Ahn   +5 more
doaj   +1 more source

Assessment of relationship between maxillary sinus membrane thickening and the adjacent teeth health by cone-beam computed tomography

open access: yesJournal of Dental Sciences, 2021
Background/purpose: Maxillary posterior teeth have close anatomical proximity to the maxillary sinus floor. The aim of this retrospective study was to evaluate the associations between maxillary sinus membrane thickening and the adjacent teeth health by ...
Yen-Ting Huang   +3 more
doaj   +1 more source

Constitutive Model for Time-Dependent Flows of Shear-Thickening Suspensions [PDF]

open access: yesPhysical Review Letters, 2019
We develop a tensorial constitutive model for dense, shear-thickening particle suspensions subjected to time-dependent flow. Our model combines a recently proposed evolution equation for the suspension microstructure in rate-independent materials with ideas developed previously to explain the steady flow of shear-thickening ones, whereby friction ...
Gillissen, J. J. J.   +4 more
openaire   +6 more sources

Preparation and Performance of Thickened Liquids for Patients with Konjac Glucomannan-Mediated Dysphagia

open access: yesMolecules, 2022
The present study sought to characterize the rheological and thickening properties of Konjac glucomannan (KGM) and prepare thickening components for special medical purposes using KGM and maltodextrin as the primary raw materials and guar gum (GG ...
Wen Zhang   +3 more
doaj   +1 more source

Early Contrast Enhancement: a novel Magnetic Resonance Imaging biomarker of pleural malignancy [PDF]

open access: yes, 2018
Introduction: Pleural Malignancy (PM) is often occult on subjective radiological assessment. We sought to define a novel, semi-objective Magnetic Resonance Imaging (MRI) biomarker of PM, targeted to increased tumour microvessel density (MVD) and ...
Alexander, Laura   +10 more
core   +1 more source

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