7306.29.10 - Threaded or coupled

This HTS category, 7306.29.10, specifically encompasses threaded or coupled casing made of iron or nonalloy steel, used in the drilling of oil or gas wells. The defining characteristic here is the method of connection: these pipes are either threaded at the ends to allow for screwing together or come equipped with couplings, which are separate sleeves designed to connect sections of casing. This ensures a secure and sealed connection, crucial for the integrity of the wellbore during extraction operations.

It is important to distinguish this category from its sibling, 7306.29.20, which covers "Other" casing and tubing of a kind used in drilling for oil or gas, but which are neither threaded nor coupled. Therefore, if the oil and gas drilling casing is not prepared with threads or is not supplied with a coupling, it would fall under the sibling category.

Within this classification, further subdivisions exist to refine the classification based on the presence of the coupling. Subcategory 7306.29.10.30 specifically addresses casing that is imported with the coupling already attached or included, while 7306.29.10.90 covers other instances where the casing itself is threaded but the coupling might be imported separately or is not part of the immediate classification. This distinction aids in accurate inventory and duty assessment processes.