IPC Subgroup
E21C 37/06 by making use of hydraulic or pneumatic pressure in a borehole
Introduced: September 1968
Last revised: January 2006
Full Title
Other methods or devices for dislodging with or without loading > by making use of hydraulic or pneumatic pressure in a borehole
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- MINING OR QUARRYING
Related Keywords
mining or quarrying by HYDRAULIC(S) pressure
4 direct subcodes
Child Classifications
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- E21C 37/08 Devices with pistons, plungers, or the like pressed locally against the wall of the borehole
- E21C 37/1 Devices with expanding elastic casings
- E21C 37/12 by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
- E21C 37/14 by compressed air; by gas blast; by gasifying liquids