IPC Subgroup
E21B 17/02 Couplings; Joints
Introduced: September 1968
Last revised: January 2006
Full Title
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; Joints
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
3 direct subcodes
Child Classifications
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- E21B 17/03 between drilling rod or pipe and drill motor, e.g. between drilling rod and hammer
- E21B 17/04 between rod and bit, or between rod and rod
- E21B 17/08 Casing joints