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
19/00
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
Load children Filter patents View analytics View as hierarchy
E21B19/002
specially adapted for underwater drilling
Load children Filter patents View analytics View as hierarchy
E21B19/004
supporting a riser from a drilling or production platform
Load children Filter patents View analytics View as hierarchy
E21B19/006
including heave compensators
Filter patents View analytics View as hierarchy