Results 41 to 50 of about 2,972,520 (248)

Lost Circulation Technology Development Status [PDF]

, 1992
Lost circulation is the loss of drilling fluid from the wellbore to fractures or pores in the rock formation. In geothermal drilling, lost circulation is often a serious problem that contributes greatly to the cost of the average geothermal well.
Scott, Douglas D., Scott, D. D., Wernig, M. D., Wright, E. K., Wright, Elton K., Schafer, Diane M., Loeppke, Glen E., Schafer, D. M., Glowka, David A., Wernig, Marcus D., Loeppke, G. E., Glowka, D. A.   +11 more
core  

Comprehensive Approach to Severe Lost Circulation Problems in Russia

, 2010
In the past, a favored approach may have been used to treat most or all lost circulation incidents. However, improvements in understanding all aspects of lost circulation show that the “favored approach” method can be technically unwise today.
Matthew Miller, Natalia Collins, Andrei Kharitonov, Don Whitfill   +3 more
core   +1 more source

Mathematical Simulation of Lost Circulation in Fracture and Its Control

, 2021
Lost circulation has been one of the major problems that impede efficient and cost-saving drilling operations. The nature of lost circulation and its control is not yet fully understood.
Hongwei Jiang, Boyun Guo, Xiao Cai, Qingfeng Guo   +3 more
core   +1 more source

Diabetes‐Associated Cognitive Impairment: Pathophysiology and Emerging Therapies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Diabetes‐associated cognitive impairment (DACI) is a common yet underrecognized condition, manifesting along a spectrum from mild cognitive impairment to dementia. DACI encompasses patients who develop vascular dementia (VaD) or Alzheimer's disease (AD) with diabetes as a risk factor; however, in certain patients, particularly those lacking ...
Osman Corbali, Priyanka Menon, Halil I. Corbali, Ram Jagannathan, Allan I. Levey   +4 more
wiley   +1 more source

Automated lost circulation severity classification and mitigation system using explainable Bayesian optimized ensemble learning algorithms

Journal of Petroleum Exploration and Production Technology
Lost circulation and mud losses cause 10 to 20% of the cost of drilling operations under extreme pressure and temperature conditions. Therefore, this research introduces an integrated system for an automated lost circulation severity classification and ...
Haytham Elmousalami, Ibrahim Sakr
doaj   +1 more source

β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations

Advanced Biology, Volume 9, Issue 3, March 2025.
Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio, B. Spedicato, G. Corallo, A. Inguscio, M. Greco, D. Musarò, D. Vergara, A. F. Muro, G. De Sabbata, L. R. Soria, N. Brunetti Pierri, M. Maffia   +11 more
wiley   +1 more source

Successful Endovascular Bailout Strategy for Retained Accunet Embolic Protection Device During Vertebral Artery Stenting

Frontiers in Neurology, 2019
Introduction: Vertebral artery stenosis can lead to posterior circulation TIAs and stroke. Stenting is often performed to treat symptomatic vertebral artery stenosis.
Suraj Sulhan, Suraj Sulhan, Kristopher Lyon, Kristopher Lyon, Walter S. Lesley, Walter S. Lesley   +5 more
doaj   +1 more source

Smart Lost Circulation Materials for Productive Zones

, 2017
Lost circulation occurs when mud or cement is lost to the formation while drilling. Lost circulation has been a huge problem and may cause heavy financial costs in the form of lost rig time and mud fluid and in severe cases, well blowout with serious ...
A. Dahi Taleghani, S.. Salehi, Salehi, S., C.. Ezeakacha, G.. Li, Ezeakacha, C., Li, G., Mansour, A., A.. Mansour, Dahi Taleghani, A.   +9 more
core   +1 more source

Performance Evaluation Of The New Natural And Environmentally Friendly Material For Lost Circulation Control At High Pressure And Hight Temperature [PDF]

, 2023
Lost circulation refers to the loss of a part or whole drilling fluid into the formation and is considered as one of the most challenges in drilling operations. It could be occurred either naturally in highly fractured formations or induced by excessive
Ayad A. A.Alrazzaq, Jafar A. Ali, Pshtiwan T. Jaf   +2 more
core   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source