Couplings; joints

Introduced: September 1968

Title

Titles differ between systems:

IPC: Couplings; Joints

CPC: Couplings; joints

Full titles differ between systems:

IPC:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; Joints

CPC:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; joints

Of 6 combined children, 3 exist in both systems.

3 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

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E21B 17/021 CPC only CPC only
E21B 17/023 +2 CPC CPC only CPC only
E21B 17/028 +2 CPC CPC only CPC only
E21B 17/03 between drilling rod or pipe and drill motor , e.g. between drilling rod and hammer since 2000 IPC+CPC Available in IPC and CPC
E21B 17/04 between rod and bit or between rod and rod +1 CPC IPC+CPC Available in IPC and CPC
E21B 17/08 Casing joints +1 CPC IPC+CPC Available in IPC and CPC