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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- E21B 31/113 hydraulically operated