the core receiver having a core forming cutting edge or element, e.g. punch type core barrels

Full Title

Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors > the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe > the core receiver having a core forming cutting edge or element, e.g. punch type core barrels

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