13-3/8 Inch K55 Surface Casing for Gas Wells
Heavy-duty 13-3/8 inch K55 grade welded steel surface casing pipe used in gas well drilling to protect freshwater aquifers and provide structural support. It qualifies for HTS 7306.29.41.00 as other iron or steel casing specifically for oil or gas drilling operations, excluding those with connectors. Standard API dimensions ensure compatibility with rotary drilling rigs.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless rather than welded
Seamless precision tubes of circular cross-section classify under 7304, differentiated by absence of welds.
If imported as part of complete drilling machinery
Assembled into drilling rigs or parts thereof, classification moves to Chapter 84 for machinery components.
If threaded or with couplings attached
Presence of fittings or threads changes from 'other' casing to specifically provided for assemblies.
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Import Tips & Compliance
• Include end-use statement confirming oil/gas drilling application; maintain traceability via heat numbers
• Avoid pitfall: shipping with loose couplings, which may trigger 7306.19 classification
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