Results 111 to 120 of about 1,123,828 (350)

Spatially resolved 23Na magnetic resonance dispersion measurement in porous media

The Canadian Journal of Chemical Engineering, EarlyView.
Quantitative 23Na MRI was employed to analyze dispersion in realistic core plug samples and was compared with the conventional breakthrough curve. 23Na MRI provided a more effective aassessment of core plug heterogeneity than the conventional method. Abstract Tracer tests are widely used in the petroleum industry to assess reservoir core plugs, relying
Rheya Rajeev, Mohammad Sadegh Zamiri, Andrés Ramírez Aguilera, Florea Marica, Laura Romero de Zerón, Bruce J. Balcom   +5 more
wiley   +1 more source

Evaluation of rock mass quality and its mechanical properties through digital drilling process monitoring

Journal of Rock Mechanics and Geotechnical Engineering
The evaluation of rock mass quality and its mechanical properties is crucial for tunnel construction. The basic quality (BQ) method is the national standard for rock mass classification in China, with the BQ value determined by the uniaxial compressive ...
Xinfang Li, Xiaoping Zhang, Quansheng Liu, Shaohui Tang, Qi Zhang, Yongbin Liu   +5 more
doaj   +1 more source

Push-and-Twist Drillstring Assemblies [PDF]

, 2017
Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Firstbrook, David G., Harkness, Patrick, Li, Xuan, Lucas, Margaret, Timoney, Ryan, Worrall, Kevin   +5 more
core  

Determination of stress state in deep subsea formation by combination of hydraulic fracturing in situ test and core analysis: A case study in the IODP Expedition 319

, 2013
[1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Boutt, David, Boutt, David, Byrne, Timothy, Byrne, Timothy, Doan, Mai-Linh, Doan, Mai-Linh, Funato, Akio, Funato, Akio, ITO, HISAO, Ito, Takatoshi, KANO, YASUYUKI, LIN, WEIREN, McNeil, Lisa, McNeil, Lisa, MOE, KYAW, Saffer, Demian, Saffer, Demian, モー, キョー, 伊藤, 久男, 伊藤, 高敏, 加納, 靖之, 林, 為人   +21 more
core   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Overview of technologies for constructing the facilities at the Dniester pumped storage power station [PDF]

, 2019
Purpose. Perform an overview of the construction technologies and substantiate the effectiveness of the Ukrainian experience in building a pumped storage power station (PSPS) on the Dniester River in difficult engineering-geological conditions with the ...
Horbatiuk, Yu, Parinov, V, Petrenko, V, Radkevych, A, Tiutkin, O   +4 more
core   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models

Advances in Civil Engineering, 2018
Destress drilling method is one of the commonly used methods for mitigating rock bursts, especially in coal mining. To better understand the influences of drilling arrangements on the destress effect is beneficial for rock burst mitigation.
Tong-bin Zhao, Wei-yao Guo, Feng-hai Yu, Yun-liang Tan, Bin Huang, Shan-chao Hu   +5 more
doaj   +1 more source

Geological features and marble production qualities of Western Turkey [PDF]

, 2019
Purpose. Isparta Angle occurs along the Mesozoic carbonate axis. Carbonated rocks forming the Taurus belt are continuous with allochthonous and autochthonous features.
Leventeli, Y, Ozcelik, M
core   +1 more source

Optimization of cut‐hole layout under high in situ stress based on numerical simulation and field tests

Deep Underground Science and Engineering, EarlyView.
This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao, Diyuan Li, P. G. Ranjith, Xinxin Lü, Yanliang Li, Xiaoli Su   +5 more
wiley   +1 more source