IPC Main Group
E21B 17/00 Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings
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
Related Keywords
CASING(S) for boreholesDRILLING rods or pipes for boreholes
8 direct subcodes
Child Classifications
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- E21B 17/01 Risers
- E21B 17/02 Couplings; Joints
- E21B 17/1 Wear protectors; Centralising devices
- E21B 17/14 Casing shoes
- E21B 17/16 Drill collars
- E21B 17/18 Pipes provided with plural fluid passages
- E21B 17/2 Flexible or articulated drilling pipes
- E21B 17/22 Rods or pipes with helical structure