Down-hole impacting means, e.g. hammers

Full Title

Drives for drilling, used in the borehole > Down-hole impacting means, e.g. hammers

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

EARTH OR ROCK DRILLING; MINING

Subclass:

EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

Child Classifications

Navigate with arrow keys, Enter to open

• E21B 4/08 impact being obtained by gravity only, e.g. with lost-motion connection
• E21B 4/1 continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts
• E21B 4/12 Electrically operated hammers
• E21B 4/14 Fluid operated hammers