Screw-threaded joints; Forms of screw-threads for such joints

Introduced: September 1968

Additional Content IPC

Casing joints used in deep-drilling

Of 7 combined children, 4 exist in both systems.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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F16L 15/001 +3 CPC CPC only CPC only
F16L 15/005 CPC only CPC only
F16L 15/006 +3 CPC CPC only CPC only
F16L 15/02 allowing substantial longitudinal adjustment by the use of a long screw-threaded part IPC+CPC Available in IPC and CPC
F16L 15/04 with additional sealings since 1974 IPC+CPC Available in IPC and CPC
F16L 15/06 characterised by the shape of the screw-thread since 1990 IPC+CPC Available in IPC and CPC
F16L 15/08 with supplementary elements (F16L15/04 takes precedence) since 1990 IPC+CPC Available in IPC and CPC

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

Class F16,2013–2023, worldwide · Source: EPO PATSTAT