Grappling tools, e.g. tongs or grabs

Full Title

Fishing for or freeing objects in boreholes or wells > Grappling tools, e.g. tongs or grabs

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

Child Classifications

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• E21B 31/14 with means deflecting the direction of the tool, e.g. by use of knuckle joints
• E21B 31/16 combined with cutting or destroying means
• E21B 31/18 gripping externally, e.g. overshot
• E21B 31/2 gripping internally, e.g. fishing spears