between rod and bit, or between rod and rod

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 > between rod and bit, or between rod and rod

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

5 direct subcodes

Child Classifications

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E21B 17/042 threaded
E21B 17/046 with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
E21B 17/05 Swivel joints
E21B 17/06 Releasing-joints, e.g. safety joints
E21B 17/07 Telescoping joints for varying drill string lengths; Shock absorbers