Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E21
EARTH OR ROCK DRILLING; MINING
Load children
E21B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
Load children
15/00
Supports for the drilling machine, e.g. derricks or masts
Load children Filter patents View analytics View as hierarchy
E21B15/006
Means for anchoring the drilling machine to the ground
Filter patents View analytics View as hierarchy