9-5/8 Inch N-80 Coupled Casing
N-80 grade coupled casing with 9-5/8 inch outer diameter, designed for intermediate casing strings in oil wells. Classified under HTS 7306.29.31.00 due to its welded steel construction, threaded couplings, and specific use in oil/gas drilling. It provides corrosion resistance and structural integrity in harsh subsurface conditions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of stainless steel
Stainless steel casing variants are in a separate subheading from carbon steel.
If imported as part of complete drilling equipment
When assembled into drilling rigs or parts thereof, it shifts to Chapter 84 machinery.
If for casing used in non-oil/gas drilling like water wells
Excludes 'of a kind used in drilling for oil or gas,' moving to other welded pipes.
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Import Tips & Compliance
• Include detailed threading specifications (e.g
• EUE or premium) in commercial invoices for customs valuation
• Comply with API Monogram requirements; lack of certification can trigger inspections or delays
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8-5/8 Inch L-80 Premium Threaded Casing
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X-56 grade 18-5/8 inch threaded casing for large bore oil wells. Under HTS 7306.29.31.00 as coupled welded for drilling.
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