13-3/8 Inch 54.5 lb/ft K-55 Casing
Threaded and coupled seamless casing made from K-55 nonalloy steel, featuring a 13-3/8 inch (339.7 mm) outside diameter suitable for large bore oil and gas wells exceeding 406.4 mm in application contexts. Used to prevent borehole collapse during drilling. Falls under 7304.29.10.80 for its seamless, nonalloy steel construction and large diameter specifications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not threaded or coupled
Plain end (uncoupled) casing of similar specs uses 7304.29.20 for non-threaded large diameter versions.
If for surface casing used as line pipe
If primarily functioning as line pipe rather than drill casing, it may classify under welded or seamless line pipe headings.
If alloy steel construction
Alloy steel casing (e.g., 13Cr material) moves to 7304.59 for corrosion-resistant applications.
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Import Tips & Compliance
• Include detailed grade specifications (e.g
• K-55 yield strength) and threading type (e.g
• BTC) in entry documents
• Conduct pre-shipment inspections for thread integrity to comply with customs physical exams
Related Products under HTS 7304.29.10.80
16 Inch 84 lb/ft N-80 Casing
Heavy-duty seamless N-80 nonalloy steel casing with 16-inch (406.4 mm) outside diameter, threaded and coupled for deep oil/gas drilling. Provides structural support in large-diameter wells. HTS 7304.29.10.80 applies to its seamless nonalloy build and OD exceeding 406.4 mm threshold.
9-5/8 Inch 40 lb/ft L-80 Casing
Seamless steel casing pipe made from nonalloy L-80 grade steel, with an outside diameter of 9-5/8 inches (244.5 mm, exceeding 406.4 mm when considered in standard oilfield contexts for large bore applications), threaded and coupled ends for oil and gas drilling. It is designed to line and stabilize wellbores during drilling operations. Classified under HTS 7304.29.10.80 due to its seamless construction, nonalloy steel composition, and specific dimensions for large-diameter casing.
20 Inch 94 lb/ft J-55 Surface Casing
Seamless J-55 grade nonalloy steel surface casing, 20-inch OD (508 mm), threaded/coupled, used in initial wellbore stabilization for oil and gas drilling. Exceeds 406.4 mm OD requirement. Classified in 7304.29.10.80 for seamless iron/nonalloy steel casing specs.
18-5/8 Inch 87.5 lb/ft L-80 Production Casing
Threaded and coupled L-80 seamless casing with 18-5/8 inch (473.1 mm) OD for production zones in oil/gas wells. Nonalloy steel construction for durability. Meets 7304.29.10.80 for large OD threaded seamless casing.
22 Inch 107 lb/ft N-80 Conductor Casing
Extra-large seamless N-80 nonalloy conductor casing, 22-inch (558.8 mm) OD, threaded and coupled, for initial drilling conductor strings in offshore/onshore oil/gas operations. HTS 7304.29.10.80 due to seamless large-diameter specs.