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IPC Subgroup
E21B 31/107

using impact means for releasing stuck parts, e.g. jars

Introduced: January 1980

Last revised: January 2006

Full Title

Fishing for or freeing objects in boreholes or wells > using impact means for releasing stuck parts, e.g. jars

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

Related Keywords

(2) JARS for releasing parts stuck in boreholes or wells

1 direct subcode

Child Classifications

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