between rod and bit or between rod and rod

Introduced: September 1968

Title

Titles differ between systems:

IPC: between rod and bit, or between rod and rod

CPC: between rod and bit or between rod and rod

Full Title

Full titles differ between systems:

IPC:

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

CPC:

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

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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E21B 17/041 CPC only CPC only
E21B 17/042 Threaded +2 CPC IPC+CPC Available in IPC and CPC
E21B 17/046 with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches +1 CPC IPC+CPC Available in IPC and CPC
E21B 17/05 Swivel joints IPC+CPC Available in IPC and CPC
E21B 17/06 Releasing-joints, e.g. safety joints IPC+CPC Available in IPC and CPC
E21B 17/07 Telescoping joints for varying drill string lengths; Shock absorbers since 1980 +2 CPC IPC+CPC Available in IPC and CPC