13-3/8 Inch N80 Threaded Oil Well Casing
Heavy-duty 13-3/8 inch N80 grade seamless nonalloy steel casing, externally threaded for field coupling in deep oil wells. Essential for borehole integrity during gas drilling. Covered by 7304.29.10 as other casing of nonalloy steel that is threaded.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for structural piling
Repurposed for construction pilings shifts from drilling-specific to other hollow profiles.
If alloy steel like P110
Higher-strength alloy grades for extreme pressures classify under alloy steel casing.
If internally threaded fittings attached
Pipe fittings or nipple assemblies may fall under Chapter 73 tube fittings.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Submit chemical composition certificates proving nonalloy status (carbon steel with minimal alloy elements)
• Use BTC (Buttress Threaded and Coupled) or STC threading notations in invoices to match HTS criteria
• Avoid bulk packaging without individual protection; damaged threads lead to rejection and reclassification risks
Related Products under HTS 7304.29.10
API 5CT J55 Threaded Casing Pipe
Seamless steel casing pipe made from J55 grade nonalloy steel, threaded on both ends for coupling in oil well drilling operations. Used to line and stabilize boreholes during oil or gas extraction. Classifies under 7304.29.10 as threaded or coupled casing of iron or nonalloy steel for drilling.
7 Inch L80 Coupled Surface Casing
7-inch OD L80 nonalloy steel seamless casing with premium threaded couplings, used as surface casing in oil drilling to prevent collapse. Meets API standards for drilling tubing. 7304.29.10 applies to its threaded nonalloy steel construction for oil/gas.
20 Inch Conductor Casing Threaded Pipe
Large 20-inch seamless nonalloy steel conductor casing with threaded ends for initial oil well hole stabilization. Supports drilling through unconsolidated formations. Qualifies under 7304.29.10 for threaded iron/nonalloy steel drilling casing.
4-1/2 Inch Intermediate Casing Coupled
4-1/2 inch intermediate casing of nonalloy steel, seamless with flush threaded couplings for mid-depth oil well support. Prevents formation damage during drilling. 7304.29.10 due to threaded/coupled design for drilling applications.
16 Inch Production Casing Threaded
16-inch OD production casing seamless nonalloy steel with LTC (Long Threaded and Coupled) connections for completing oil wells. Secures perforations for flow. Falls under 7304.29.10 as threaded casing used in drilling ops.
9-5/8 Inch K55 Coupled Drill Casing
9-5/8 inch outer diameter seamless K55 nonalloy steel casing with integral couplings for oil well applications. Provides structural support in drilling for hydrocarbons. Fits 7304.29.10 due to its threaded/coupled design and nonalloy steel composition for drilling casing.