Results 81 to 90 of about 61,837 (250)

Borehole and Surface Applications of Distributed Acoustic Sensing for Characterization of the Cryosphere and Glacial Environments

Early borehole and surface distributed acoustic sensing (DAS) experiments have demonstrated the viability of the method in glacial settings and allowed new ...
Brisbourne, Alex M, Hudson, Thomas S, Kendall, J. Michael, Kendall, J Michael, Brisbourne, Alex M., Hudson, Thomas S.   +5 more
core   +1 more source

Ultrasonic borehole flowmeter [PDF]

, 2008
Published ArticleAlthough research has been conducted in the field of Acoustic Doppler Borehole Flowmeters (ADBF), it has been focused on point source of flow and three dimensional borehole flow techniques.
Du Preez, M., Hertzog, P.
core  

Borehole Plugging Program [PDF]

, 1978
Activities are reported in programs to locate, test, and select materials for borehole plugs near nuclear waste repositories. Background information concerning borehole plugging is presented and work to date is summarized.

core   +1 more source

Numerical research on anti‐dislocation measures design of deep‐buried tunnels in an anisotropic rock mass area

Deep Underground Science and Engineering, EarlyView.
This paper conducts a numerical simulation study on the construction of a deep‐buried tunnel in an anisotropic stratum area. A statistical analysis of the effects of two anti‐faulting design measures, namely, a conventional design and an articulated design, is carried out, and the results demonstrate the effectiveness of the anti‐faulting structures ...
Shiqi Liu, Huanling Wang, Yong Zhou, Zhen Wang   +3 more
wiley   +1 more source

Borehole (slurry) mining of coal, uraniferous sandstone, oil sands, and phosphate ore [PDF]

"This paper reviews advances in the art of borehole (slurry) mining made by the Bureau of Mines from 1974 to 1980. The design of a prototype borehole-mining tool (bmt) developed by the Bureau of Mines is presented along with production data, reclamation ...

core  

Coastal salina evaporites of the Triassic-Liassic boundary in the Iberian Peninsula : the Alacón borehole [PDF]

, 2004
The evaporite unit (the Lécera Formation), which was formed at the Triassic-Liassic boundary in the Aragonian Branch of the Iberian Chain, was studied at the 01 Alacón borehole (Alacón village, Teruel province), where it is mainly constituted by a thick (
Salvany i Duran, Josep Maria, Ortí Cabo, Federico, ORTÍ CABO, F., Salvany Duran, Josep Maria, SALVANY, J. M.   +4 more
core   +1 more source

Reusing depleted oil and gas wells for geothermal energy: Feasibility, challenges, and a decision‐making framework for sustainable conversion

Deep Underground Science and Engineering, EarlyView.
The graphical abstract presents a structured decision‐support framework for assessing the feasibility of converting depleted oil and gas wells into geothermal energy systems. The left panel illustrates a comprehensive, multi‐stage decision‐making framework progressing from prefeasibility screening and technical–economic analysis to policy alignment ...
Karolina Bieryt, Yu Pan, Heinz Konietzky, Fei Wang   +3 more
wiley   +1 more source

Study of Transfer Characteristics of a Molecular Electronic Sensor for Borehole Surveys at High Temperatures and Pressures

Sensors, 2019
The paper considers the development and experimental study of the characteristics of a high-temperature motion parameter sensor based on molecular-electronic technology (MET) operating at elevated pressures.
Ilya Evseev, Dmitry Zaitsev, Vadim Agafonov   +2 more
doaj   +1 more source

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

Borehole Waters From Hole U1601C (Atlantis Massif) Provide Constraints for a Deep‐Sourced Formation Water That (Could) Feed the Lost City Hydrothermal Field

Geochemistry, Geophysics, Geosystems
Hole U1601C, drilled during International Ocean Discovery Program (IODP) Expedition 399, reached a depth of 1,268 m below the seafloor (mbsf) in the Atlantis Massif (30°N, 42°W).
C. Geoffrey Wheat, Susan Q. Lang, Gordon Southam, Will Osborne, Ivan P. Savov, Samuele Agostini, Jordan Poitras   +6 more
doaj   +1 more source