IPC Subgroup
E21B 33/129 with mechanical slips for hooking into the casing
Introduced: September 1968
Last revised: January 2006
Full Title
Sealing or packing boreholes or wells > in the borehole > Packers; Plugs > with mechanical slips for hooking into the casing
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
1 direct subcode
Child Classifications
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- E21B 33/1295 actuated by fluid pressure