PDC drilling connector: the heading 8431 versus 8207 distinction

A 48 mm, P1-type component with an AW female-thread connection, used in core drilling to connect the drill pipe in the coring assembly to the drill bit. The published BTB classifies it under Turkish GTIP 8431.43.00.00.00.

The BTB cites General Rules 1 and 6 and the Turkish Customs Tariff Explanatory Notes to heading 84.31. It also refers to an expert report from the Mining Engineering Department of Middle East Technical University.

In the published description, the component does not directly drill the material; it connects the drill pipe to the bit. This intermediate connection function gave it the character of a drilling-machine part and led to GTIP 8431.43.00.00.00.

If the article directly acts on the material through its own cutting surface and functions as a replaceable drilling tool, heading 82.07 may need to be considered. Turkish BTB TR060000260016 classifies a 48 mm PDC non-coring bit under GTIP 8207.19.10.00.12. Verify the working surface and actual function, not just the catalogue name.