IPC Main Group
E21B 37/00 Methods or apparatus for cleaning boreholes or wells
Introduced: September 1968
Last revised: January 2006
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
Scope Notes
Limiting references: Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Related Keywords
cleaning BOREHOLESCLEANING boreholes
4 direct subcodes
Child Classifications
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- E21B 37/02 Scrapers specially adapted therefor
- E21B 37/06 using chemical means for preventing or limiting the deposition of paraffins or like substances
- E21B 37/08 cleaning of down-hole filters, screens, or gravel packs
- E21B 37/1 Well swabs