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
23/00
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Load children Filter patents View analytics View as hierarchy
E21B23/01
for anchoring the tools or the like
Filter patents View analytics View as hierarchy