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
33/00
Sealing or packing boreholes or wells
Load children Filter patents View analytics View as hierarchy
E21B33/02
Surface sealing or packing
Load children Filter patents View analytics View as hierarchy
E21B33/03
Well heads; Setting-up thereof
Load children Filter patents View analytics View as hierarchy
E21B33/04
Casing heads; Suspending casings or tubings in well heads
Load children Filter patents View analytics View as hierarchy
E21B33/0415
rotating or floating support for tubing or casing hanger
Filter patents View analytics View as hierarchy