Results 71 to 80 of about 1,405,729 (293)

Understanding Lost Circulation While Cementing: Field Study and Laboratory Research

, 2018
Summary Lost circulation is a time-consuming and expensive challenge, costing the oil and gas industry billions of dollars each year in materials, nonproductive time, and minimized production (Catalin et al. 2003; Fidan et al. 2004; API 65-
S.. Taoutaou, S. G. James, P. W. Way, E.. Therond, A.. Dondale, P.. Gomes   +5 more
core   +1 more source

Hemocompatible Glycogen‐Tissue Plasminogen Activator Complexes for Enhanced Blood Clot Dissolution

Advanced Healthcare Materials, EarlyView.
Glycogen–heparin‐cRGD nanoparticles enable targeted delivery of tissue plasminogen activator (tPA) to thrombi through activated platelet recognition. The hemocompatible hybrids minimize interactions with blood and immune cells while retaining enzymatic biodegradability.
Nadiia Davydiuk, Vaidehi Londhe, Susanne Boye, Martin Müller, Carsten Werner, Manfred F. Maitz, Quinn A. Besford   +6 more
wiley   +1 more source

Application of adaptive neuro-fuzzy inference system and data mining approach to predict lost circulation using DOE technique (case study: Maroon oilfield)

Petroleum, 2020
Lost circulation is the most common problem encountered while drilling oil wells. Occurrence of such a problem can cause a lot of time and cost wastes.
Farough Agin, Rasool Khosravanian, Mohsen Karimifard, Amirhosein Jahanshahi   +3 more
doaj   +1 more source

Lost Circulation Problems and Solutions

, 2014
The basic outline of the project focuses on problems seen in the field due to lost circulation of drilling fluids in the wellbore. This is one of the biggest contributors to non-productive time while drilling a well. In the oil industry, any time lost is
Thibodeaux, Garrett
core  

Advanced Materials for Biologics Delivery to Brain Tumors

Advanced Materials, EarlyView.
Material innovation is central to unlocking the therapeutic potential of biologics against many central nervous system diseases, including brain cancer. By engineering carriers with controlled transport, targeting, and release properties, advanced materials can overcome the blood–brain barrier and tumor microenvironment, improving the delivery of ...
Yuran Feng, Yuxue Cao, Maria Kavallaris, Taskeen Janjua, Amirali Popat   +4 more
wiley   +1 more source

Progress in The Lost Circulation Technology Development Program

, 1991
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.
Wright, E. K., Schafer, D. M., Loeppke, G. E., Glowka, D. A.   +3 more
core  

Bacteria‐Trained, MnO2‐Armored Dendritic Cells for Immunotherapy

Advanced Materials, EarlyView.
MnO2‐armored, bacteria‐trained dendritic cells undergo tumor‐responsive mechanical and immunological transformation. The nanocoating masks immune ligands and maintains a mechanically stiff, quiescent state during circulation, while the tumor microenvironment removes the armor and restores cellular deformability and immune accessibility.
Zhao Guo, Min Ge, Zesong Ruan, Tingwang Shi, Mahyar Mahmoudi, Soohwan An, Na Kong, Yunfeng Chen, Han Lin, Wei Tao   +9 more
wiley   +1 more source

Lost circulation technology workshop, October 9-10, 1984 [PDF]

, 1985
This report summarizes the presentations and discussions of a workshop on lost circulation technology. The workshop identified and defined lost circulation problem areas in field operations, materials, mud effects, and standards.
Caskey, B.C. (ed.)
core  

Recent Advances in Light‐Addressable Electrochemistry for Spatially Resolved Applications

Advanced Materials Technologies, EarlyView.
This comprehensive review highlights light‐addressable electrochemistry as a powerful tool that uses light to control localized chemical reactions on unstructured semiconductor surfaces. The work evaluates advanced strategies to optimize electrode materials for enhanced spatial resolution and stability. Furthermore, it showcases diverse applications in
Nhi Trang Vo, Sina Jamali, Nam‐Trung Nguyen   +2 more
wiley   +1 more source

Gas kick and lost circulation risk identification method with multi-parameters based on support vector machine for drilling in deep or ultradeep waters

Engineering Science and Technology, an International Journal
In deepwater and ultra-deepwater drilling, formation pressures are complex and the drilling fluid density window is narrow, which makes it prone to well control incidents such as kicks and lost circulation.
Kai Feng, Shujie Liu, Zhiming Yin, Yi-long Xu, Meipeng Ren, Deqiang Tian, Bangtang Yin, Baojiang Sun   +7 more
doaj   +1 more source