Results 21 to 30 of about 13,384 (264)

Study of cement properties for plugging oil wells

Вестник Дагестанского государственного технического университета: Технические науки, 2022
Objective. Cementing oil and gas wells at a sufficiently large depth and at high temperatures is a rather complex and energy-intensive process that requires the use of special cement. The review material on oil well cements confirms the responsibility of
M. Sh. Salamanova
doaj   +1 more source

Rheological evaluation of compatibility in oil well cementing

Applied Rheology, 2017
Applied ...
Choi Myoungsung, Prudhomme Robert K., Scherer George W.   +2 more
openaire   +2 more sources

The effect of polypropylene fiber on the curing time of class G oil well cement and its mechanical, petrophysical, and elastic properties

Journal of Petroleum Exploration and Production Technology, 2023
The cement paste is subjected to various loads throughout a well’s life, which may compromise some of its essential characteristics and impair its performance.
Abdulmalek Ahmed, Ahmed Abdulhamid Mahmoud, Salaheldin Elkatatny   +2 more
doaj   +1 more source

Various admixtures to mitigate the long-term strength retrogression of Portland cement cured under high pressure and high temperature conditions

Journal of Rock Mechanics and Geotechnical Engineering, 2023
In order to investigate the problem of long-term strength retrogression in oil well cement systems exposed to high pressure and high temperature (HPHT) curing conditions, various influencing factors, including cement sources, particle sizes of silica ...
Jiankun Qin, Xueyu Pang, Ashok Santra, Guodong Cheng, Hailong Li   +4 more
doaj   +1 more source

Hydration kinetics of oil well cement in the temperature range between 5 and 30°C

Frontiers in Materials, 2022
Modeling the hydration kinetics of oil well cement as a function of temperature is critical for offshore cementing projects related to natural gas hydrates. During this study, the heat release of oil well cement hydration in the temperature range between
Lijun Sun, Lijun Sun, Xueyu Pang, Xueyu Pang, Haibing Yan   +4 more
doaj   +1 more source

Characterization of Oil Well Cement–Formation Sheath Bond Strength

Eng
The aim of this study is to develop a simple and reliable laboratory testing procedure for evaluating the bond strength of cement–formation sheaths that considers cement slurry composition and contamination as well as formation strength and formation ...
Musaed N. J. AlAwad, Khalid A. Fattah
doaj   +1 more source

Mechanical Properties and Structures of Oil-well Cement Stone Reinforced with Siliceous Whisker [PDF]

Journal of Petroleum Science and Technology, 2018
To fully utilize the siliceous whiskers and improve the mechanical properties of oil-well cement, the cement composites with different additions of siliceous whiskers were prepared, and analyzed by means of scanning electron microscopy (SEM), mechanical ...
Li Ming, Deng Shuang, Jin Jianzhou, Yang Yujia, Guo Xiaoyang   +4 more
doaj   +1 more source

Preparation of SiO2 coated carbon fibers and its interfacial properties with cement paste matrix

Frontiers in Materials, 2023
As a porous brittle material, oil well cement in oil and gas well cementing is difficult to bear complex loads, which can easily lead to the failure of the mechanical integrity of cement sheath.
Yanan Geng, Qiang Ren, Zengmin Yang, Dan He, Zhiqiang Wu, Jingxuan Cai, Chunmei Zhang, Xiaowei Cheng   +7 more
doaj   +1 more source

Metronidazole‐Loaded Cyclodextrin Nanogels for Antibacterial Therapy and Microbiota Regulation in Periodontitis

Advanced Healthcare Materials, EarlyView.
A methacrylamide β‐cyclodextrin‐based nanogel (MACD nGel) is developed to load the antimicrobial drug Metronidazole (MNZ) for topical delivery for the treatment of periodontitis. It is demonstrated that cyclodextrin nanogel (nGel) loaded with metronidazole provides an efficient drug delivery route but also has potential clinical applications and offers
Yanjing Ji, Ruichen Zhang, Dongyi Xu, Patrick C. A. van der Wel, Alessia Lasorsa, Guotai Li, Fangze Guo, Qihui Zhou, Patrick van Rijn   +8 more
wiley   +1 more source

Thermal Processing Creates Water‐Stable PEDOT:PSS Films for Bioelectronics

Advanced Materials, Volume 37, Issue 13, April 2, 2025.
Instead of using chemical cross–linkers, it is shown that PEDOT:PSS thin films for bioelectronics become water‐stable after a simple heat treatment. The heat treatment is compatible with a range of rigid and elastomeric substrates and films are stable in vivo for >20 days.
Siddharth Doshi, Margaux O. A. Forner, Pingyu Wang, Salim El Hadwe, Amy T. Jin, Gerwin Dijk, Kenneth Brinson, Juhwan Lim, Antonio Dominguez‐Alfaro, Carina Yi Jing Lim, Alberto Salleo, Damiano G. Barone, Guosong Hong, Mark L. Brongersma, Nicholas A. Melosh, George G. Malliaras, Scott T. Keene   +16 more
wiley   +1 more source