Results 191 to 200 of about 28,514,986 (248)

Arthroscopic Technique for Anterior Calcaneal Process Avulsion Fractures and Bifurcate Ligament Injuries Using Suture Tape Augmentation

Arthroscopy Techniques, EarlyView.
Abstract Avulsion fractures of the anterior process of the calcaneus are frequently associated with injury to the bifurcate ligament and may result in persistent lateral midfoot pain and instability. Although open fixation or fragment excision has traditionally been used, these approaches may fail to restore ligamentous function and joint stability ...
Rodrigo Díaz‐Fernández
wiley   +1 more source

Arthroscopic Diagnosis and All‐Inside Repair of Meniscofibular Ligament Tear

Arthroscopy Techniques, EarlyView.
Abstract Meniscofibular ligament (MFL) tears are an under‐recognized source of lateral meniscal instability, frequently encountered in association with anterior cruciate ligament injury. Failure to identify and address MFL insufficiency may result in persistent posterolateral pain and meniscal hypermobility despite successful anterior cruciate ligament
Alberto Grassi, Tosca Cerasoli, Vito Gaetano Rinaldi, Claudio Rossi, Giulio Maria Marcheggiani Muccioli, Stefano Zaffagnini   +5 more
wiley   +1 more source

String Figuring young children's perspectives of quality in English early childhood education and care

British Educational Research Journal, EarlyView.
Abstract Quality in early childhood education and care (ECEC) is a contested concept and has generally been conceptualised by inter‐related indicators such as staff qualifications, educational environment, policy or child‐to‐staff ratios. There has been a more limited emphasis on how young children might perceive and experience quality.
Nikki Fairchild, Éva Mikuska
wiley   +1 more source

A Method for Optical Quantification of Local Oxygen Limitations in Multiphase Bioreactors

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Spatial oxygen limitation is a major source of physiological stress and metabolic, scale‐dependent heterogeneity in aerobic bioprocesses. In gas‐liquid stirred tank reactors, oxygen availability is governed by hydrodynamics and mass transfer and is therefore inherently non‐uniform.
Ryan Rautenbach, Katharina Zörner, Jonas Barczyk, Marko Hoffmann, Ralf Takors, Michael Schlüter   +5 more
wiley   +1 more source

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Polyoxyalkyleneamine as Shale Inhibitor in Water-Based Drilling Fluids

Applied Clay Science, 2009
According to the conventional evaluation methods of drilling fluids, the inhibitive property of polyoxyalkyleneamine (POAM), which was prepared in the laboratory, to sodium montmorillonite (Na-MMT) was investigated, and the shale cuttings recovery ratio and the rheological properties of drilling fluids were measured before and after adding POAM in ...
Yuanzhi Qu, Xiaoqing Lai, Laifang Zou, Yi'nao Su   +3 more
exaly   +2 more sources

Nanoparticles Performance as Fluid Loss Additives in Water Based Drilling Fluids

Materials Science Forum, 2016
Nanoparticles are used to study the rheological characteristics of drilling fluids. Nanoparticles have high surface to volume ratio, therefore only small quantity is required to blend in the drilling fluid. This research evaluates the performance of nanosilica and multi walled carbon nanotubes (MWCNT) as fluid loss additives in water based drilling ...
Abdul Razak Ismail, Wan Rosli Wan Sulaiman, Mohd Zaidi Jaafar, Issham Ismail, Elisabet Sabu Hera   +4 more
openaire   +2 more sources

Effect of pH on Rheological and Filtration Properties of Water-Based Drilling Fluid Based on Bentonite

Sustainability, 2019
The design of drilling fluids is very important for the drilling operation success. The rheological properties play a key role in the performance of the drilling fluid.
Abdulaziz Al-Majed, Salem Basfar, Salaheldin Elkatatny   +2 more
exaly   +2 more sources

Water-Based Drilling Fluid for HT/HP Applications

International Symposium on Oilfield Chemistry, 2007
Abstract The superior performance of invert emulsion fluids in challenging drilling operations such as HT/HP wells makes them the preferred fluid for such applications. However, there are instances such as drilling in environmentally sensitive areas, or where costs and logistics become prohibitive, where their use is undesirable. In such
Mostafa Tehrani, Andrew Popplestone, Alberto Guarneri, Stefano Carminati   +3 more
openaire   +1 more source

Novel Lubricants for Water-Based Drilling Fluids

Proceedings of SPE International Symposium on Oilfield Chemistry, 1999
Abstract As drilling in directional and extended-reach wells continues to gain popularity, high torque and drag become increasingly important issues. This is particularly true for water-based muds (WBM), which generally give rise to high coefficients of friction (COF) between the drillstring and the wellbore and, therefore, high torque ...
F. B. Growcock, T. P. Frederick, A. R. Reece, G. W. Green, M. D. Ruffin   +4 more
openaire   +1 more source

Xanthan behaviour in water-based drilling fluids

Polymer Degradation and Stability, 1992
Abstract As there is a need for drilling fluid stability under high salinity conditions, the rigid polyelectrolyte xanthan was evaluated as a component in clay/polymer suspensions. A study of polymeric stabilization, rheological properties and thermal stability of the suspensions was carried out.
Wenbing Xie, Jacqueline Lecourtier
openaire   +1 more source