Results 181 to 189 of about 333 (189)

Efficiency of the pulse shape in rotary-percussive borehole drilling

Soviet mining science, 1971
O. D. Alimov, I. D. Shaposhnikov, L. T. Dvornikov   +2 more
openaire   +1 more source

Percussive augmenter of rotary drills for operating as a rotary-hammer drill

2014
ALDRICH JACK BARRON, BAR-COHEN YOSEPH, SHERRIT STEWART, BADESCU MIRCEA, BAO XIAOQI, SCOTT JAMES SAMSON   +5 more
openaire   +1 more source

Study on Steel Ball Impactor for Rotary Percussion Drilling

2010
Chunhua Lu, Taining Yan, Jie Zhang, N. Egorov   +3 more
openaire   +1 more source

Research on rock breaking mechanism of rotary-percussion drilling in marine hard rock strata and the influence of engineering and tool parameters on ROP

Geoenergy Science and Engineering
Yan Xi, Gonghui Liu
exaly  

borehole produced using a rotary-percussion drill

2014
openaire   +1 more source

Development and Field Use of a High-Frequency Gas-Operated Rotary-Percussion Drilling Tool

JPT, Journal of Petroleum Technology, 1960
exaly  

Completely hydraulic rotary percussive rock drills. Conference

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1976
openaire   +1 more source

Numerical investigation of rock-breaking mechanisms and influencing factors of different PDC cutters during rotary percussion drilling

Geoenergy Science and Engineering
Yumei Li, Yan Xi, Jiajia Feng
exaly  

Study on Steel Ball Impactor for Rotary Percussion Drilling

2009
exaly