Results 91 to 100 of about 194,053 (216)

Embedded Drilling System using Rotary-percussion Drilling

, 2017
The drilling technology is widely used in various fields. This technology has been developed explosively by large companies. However, conventional drilling system requires large equipment such as a rig and mud systems.
Kim, Jinkwang, Kim, Jong Heon, Myung, Hyun   +2 more
core   +1 more source

An Experimental Investigation of the Effects of Fiber Laser Percussion Drilling: Influence of Process Parameters [PDF]

International Journal of Advanced Design and Manufacturing Technology, 2016
This study is focused on investigating the parameters of laser percussion drilling process of nickel-base super alloy Inconel 718 with thickness of 1 mm. Fiber laser with the power of 500 watts was used as the laser source.
Mahmoud Moradi, Alireza Mohazab Pak, Ali Khorram   +2 more
doaj  

Partially Coherent Flat-Topped Beam Generated by an Axicon

Applied Sciences, 2019
The intensity distribution of a partially coherent beam with a nonconventional correlation function, named the multi-Gaussian Schell-model (MGSM) beam, focused by an axicon was investigated in detail.
Minghui Zhang, Xianlong Liu, Lina Guo, Lin Liu, Yangjian Cai   +4 more
doaj   +1 more source

Percussion Ensembles [PDF]

, 2015
Performance of the USU Percussion Ensemble and Caine Percussion Ensemble.https://digitalcommons.usu.edu/music_programs/1257/thumbnail ...
USU Percussion Ensemble, Caine Percussion Ensemble   +1 more
core   +1 more source

Innovation and Application of Cluster Edge Buttons of DTH Hammer Drill Bit in Large-Diameter Geothermal Well with High-Strength Rock

Applied Sciences
Down-the-hole (DTH) hammer drilling has high rock-breaking efficiency and a decisive advantage in hard rock drilling, which can reduce the cost of geothermal drilling.
Hongyu Ye, Haoyu Yu, Shengyu He, Longjun Tian, Xiuhua Zheng, Changgen Bu   +5 more
doaj   +1 more source

Acceleration Mechanism and Efficiency of High-Speed Rotary Percussion Drilling and Grinding of Cement Plug

Shiyou jixie
At the time of rotary percussion drilling and grinding of cement plug at high speed,the combination of high-speed rotary cutting and high-frequency axial percussion can significantly improve the efficiency of drilling and grinding cement plug,but the ...
Liu Wang, Guo Zhaohui, Jiang Zixuan, Guan Feng, Tian Haifeng, Li Zirui, Xia Yusheng   +6 more
doaj  

Development and Application of Downhole Drilling Tool with Pulsed Asymmetrical Flow Field

Shiyou jixie, 2016
Low utilization ratio of downhole hydraulic energy in conventional drilling operation results in reduction of hydraulic auxiliary rock breaking and removal capability so that downhole cuttings cannot be timely removed to cause repeated breaking and even ...
Shao Dongdong, Liu Ya, Wu Bo, Cao Jun, Wang Wei   +4 more
doaj  

University Percussion Ensemble, March 25, 1998

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, March 25, 1998, 1:00 p.m., the 429th concert of the School of Music's 1997-1998 season.Members of the University Percussion Ensemble in ...
Western Michigan University. Percussion Ensemble
core  

Richard Brown, percussion with guest artist Leonard Raver, organ

, 2008
Offertoire, from Mass for the Parishes, François Couperin (1668-1733) -- Requiem, for organ and percussion (1978), Paul Cooper (1926-) -- Toccata, Adagio and Fugue in C, BWV 564, Johann Sebastian Bach (1685-1750) -- Divertimento for Number Three, in ...

core  

Proceedings of the Integrated Ocean Drilling Program 307: Modern Carbonate Mounds: Porcupine Drilling

, 2006
<p>Challenger Mound, a prominent mound structure covered with dead cold-water coral rubble on the southwest Irish continental margin, was the focus of 12 days of scientific drilling aboard the <em>JOIDES Resolution</em> during ...
Sasaki, Keiichi, Titschack, Jürgen, Foubert, Anneleen, Browning, Emily L., Gharib, Jamshid J., Frank, Tracy D., Bjerager, Morten, Andres, Miriam S., Li, Xianghui, Léonide, Philippe, Gaillot, Philippe, Abe, Kohei, Mangelsdorf, Kai, Huvenne, Veerle Ann Ida, Novosel, Ivana, Samarkin, Vladimir, Kano, Akihiro, Williams, Trevor, Fuwa, Yuji, De Mol, Ben, Spivack, Arthur J., Takashima, Chizura, Ferdelman, Timothy G., Cragg, Barry, Sakai, Saburo   +24 more
core   +1 more source