Liming · Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) 08/2014 08/13/2014 CN103982134A An anti-circulation drilling tools 08/12/2014 US8800690 Down-the-hole drill hammer having a reverse exhaust system and
Request PDF on ResearchGate | On Feb 21, 2012, Essaieb Hamdi and others published Numerical simulation by FRANC2D of the rock fragmentation induced by a drill bit
Liming · FP-CH370_/__ 336|10 FP-CH370_/__。2011
Liming · A method for the directional control of a rock-drilling ma-chine, the drilling unit (1) of the rock-drilling machine, which is located in a borehole (2), comprising at least a pi-lot drill bit (6) or an underreamer drill bit (8), the drill bit(s) (6, 8) being driven by an electric motor (10) via a gearbox (12), and the drill bit(s) (6, 8) being moved into the rock (3) by means of a feeding rod
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Liming · Application: ST-100 small drill rig widely used in drilling family wells, drilling industry wells and drilling survey geological sampling, SPT service etc. Drilling dia. will from 50-200mm or large, according to clients requirement, it can drill max. 100m deep.
BIT,ROCK DRILL. BIT,ROCK DRILL Product/Part Number T1607MO BRUNNER AND LAY INC . Procurement: Invalid emails will appear to work, but in reality we will NOT receive them. Please make sure you type it correctly. User Details . Full Name * Please enter your FULL NAME . Email *
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ARMA/USRMS 05-670 Poroelastic analysis of rock indentation failure by a drill bit Zhang, Jincai CIRES, The University of Colorado, Boulder, CO 80309-0216, USA
Liming · DRILL PANGOLIN is a joint venture continuously innovating global enterprise. Mainly engaged in developing and supplying major high-tech top …
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A rock bit is provided that comprises a generally cylindrical body with a leading end for boring in a rock formation and a trailing end for connection to a drill rod. The body has a generally cylindrical outside surface and comprises a plurality of parallel longitudinal grooves circumferentially spaced around the outside surface and extending from the leading end to the trailing end.
Liming · The invention relates to a method and device for the drilling, in particular the percussive drilling or rotary percussive drilling of holes (9) in the ground or in rock, a bore hole (9) being formed by a drill bit (1) that is mounted on a drill pipe (3), by a percussive and/or rotary movement.
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The U.S. Department of Energy''s Office of Scientific and Technical Information
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