Results 81 to 90 of about 168,341 (157)

The Atacama Rover Astrobiology Drilling Studies (ARADS) Project. [PDF]

Astrobiology, 2023
Glass B, Bergman D, Parro V, Kobayashi L, Stoker C, Quinn R, Davila A, Willis P, Brinckerhoff W, Warren-Rhodes K, Wilhelm MB, Caceres L, DiRuggiero J, Zacny K, Moreno-Paz M, Dave A, Seitz S, Grubisic A, Castillo M, Bonaccorsi R.   +19 more
europepmc   +1 more source

Ways to Improve the Efficiency of Percussive-Rotary Drilling

, 2012
На основе анализа факторов, влияющих на эффективность ударно-вращательного бурения, и данных стендовых испытаний при проведении разрушений горных пород, предложен метод повышения эффективности буровых работ при нанесении внецентренных ударных импульсов ...
Leonov, Sergey O., Нескоромных, В.В., Neskoromnyh, Vyacheslav V., Леонов, С.О.   +3 more
core   +1 more source

Experimental Study of Down-the-Hole Percussive Drilling [PDF]

In the literature of percussive drilling, several laboratory and field experimental studies have reported the existence of optimum drilling states. The rate of penetration increases with axial thrust (weight-on-bit) up to an optimal value, beyond which ...
Borges Dos Santos, Joao Victor
core   +1 more source

A Mission Simulating the Search for Life on Mars with Automated Drilling, Sample Handling, and Life Detection Instruments Performed in the Hyperarid Core of the Atacama Desert, Chile. [PDF]

Astrobiology, 2023
Stoker CR, Glass BJ, Stucky TR, Dave AI, Kobayashi LT, Quinn RC, Moreno-Paz M, Sánchez-García L, Mora MF, Kehl F, Parro V, Willis PA, Davila A, Noe Dobrea E, Rask JC, Ricardo D.   +15 more
europepmc   +1 more source

Investigation of Axial–Torsional Vibration Characteristics and Vibration Mitigation Mechanism in Compound Percussive Drilling

Applied Sciences
Severe drill string vibrations, particularly stick–slip, significantly compromise drilling efficiency and tool longevity in deep hard formations. Compound percussive drilling (CPD) has emerged as a promising technique to mitigate these vibrations and ...
Wei Wang, Boyu Guo, Gonghui Liu, Chunqing Zha, Tian Chen, Jun Li   +5 more
doaj   +1 more source

Proceedings of the Integrated Ocean Drilling Program 333: NanTroSEIZE Stage 2: Subduction Inputs 2 and Heat Flow

, 2012
<p>The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) program is a coordinated, multiexpedition drilling project designed to investigate fault mechanics and seismogenesis along subduction megathrusts through direct sampling, in situ ...
Kinoshita, Masataka, Saitoh, Yu, Gao, Shu, Satoguchi, Yasufumi, Screaton, Elizabeth J., Lee, Gwangsoo, Bauersachs, Thorsten, Strasser, Michael, Henry, Pierre, Scudder, Rachel P., Moore, Gregory F., Moe, Kyaw Thu, Song, Bo Ra, Kanamatsu, Toshiya, Alves, Tiago M., Laberg, Jan Sverre, Matsubayashi, Osamu, Lee, Youngmin, Marcaillou, Boris, Kawamura, Kiichiro, Saffer, Demian M., Lu, Yuehan, Nagahashi, Yoshitaka, Garcon, Marion, Kitamura, Yujin, Underwood, Michael B., Daigle, Hugh, Yamaguchi, Asuka, Ekinci, Mehmet Koray, Novak, Beth   +29 more
core   +1 more source

Ways to Improve the Efficiency of Percussive-Rotary Drilling

, 2020
На основе анализа факторов, влияющих на эффективность ударно-вращательного бурения, и данных стендовых испытаний при проведении разрушений горных пород, предложен метод повышения эффективности буровых работ при нанесении внецентренных ударных импульсов ...
Leonov, Sergey O., Нескоромных, В.В., Neskoromnyh, Vyacheslav V., Леонов, С.О.   +3 more
core  

Composite Percussive Rock Breaking Mechanism in Deep Strata of Xihu Block,East China Sea Basin

Shiyou jixie
The improvement of rate of penetration(ROP)in deep,high confining pressure formations is closely related to the rock breaking method.In the Xihu block of the East China Sea Basin,the percussive rock breaking method is mainly used to improve ROP.In this ...
Li Jiwei
doaj  

VIPER’s Mass Spectrometer Observing Lunar Operations (MSolo)

The Planetary Science Journal
The Volatiles Investigating Polar Exploration Rover (VIPER) is a lunar volatiles detection and measurement mission that will land on Mons Mouton near Nobile crater, close to the Moon’s south pole.
Roberto Aguilar Ayala, Janine E. Captain, James T. Smith, Matthew L. Hancock, Alexander W. Jarnot, Kevin E. Smith, Prital J. Johnson, Christopher S. Johnson, Rodolphe Carro, Rolando J. Nieves, Christopher N. Bond, John Trautwein, Kenneth C. Wright, Jaime L. Winfield, Peter Santariello, Amy McAdam, P. Douglas Archer, Gregory Kreinheder, Jorge A. Diaz, Parvathy Prem, Kathleen E. Mandt, Aleksandra Gawronska, Barbara A. Cohen, Jaqueline W. Quinn   +23 more
doaj   +1 more source

Bow-and-arrow, technology of the first modern humans in Europe 54,000 years ago at Mandrin, France. [PDF]

Sci Adv, 2023
Metz L, Lewis JE, Slimak L.
europepmc   +1 more source