20 Inch Conductor Casing
Large-diameter 20-inch conductor casing of non-alloy steel, first string installed to support unconsolidated surface sediments in offshore drilling. HTS 7306.29.2000 for 'other' welded iron/nonalloy casing used in initial drilling phases. Heavy wall design for drive-pipe applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for structural marine use
If for platform legs rather than wellbore, classifies as oil rig reservoirs/tanks.
If bulk unfinished stock
Shipped in random lengths without threading becomes unfinished welded tubes.
Not sure which classification is right?
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Import Tips & Compliance
• Declare exact OD/ID tolerances certified to API for large-diameter verification
• Use galvanized coatings only if documented; otherwise, specify bare for accurate duty
Related Products under HTS 7306.29.20.00
9-5/8 Inch 40 lb/ft Casing
This 9-5/8 inch OD casing with 40 lb/ft weight is non-alloy steel tubing used as surface casing in oil/gas wells to isolate freshwater zones. It qualifies under HTS 7306.29.2000 for 'other' nonalloy steel drilling casings due to its welded construction and API-compliant dimensions for borehole stabilization. Typically features LTC (Long Threaded and Coupled) connections.
4-1/2 Inch Liner Casing
Slotted or blank 4-1/2 inch liner casing hanger extensions for tie-back in extended reach oil wells, non-alloy steel welded construction. Under HTS 7306.29.2000 as drilling casing 'other', extends production intervals without full recementing. Hanger-compatible threading.
API 5CT J55 Casing Pipe
This is a non-alloy steel casing pipe meeting API 5CT J55 specifications, used to line oil and gas wells during drilling to prevent collapse of unconsolidated formations. It falls under HTS 7306.29.2000 as 'other' casing of iron or nonalloy steel for drilling applications, distinct from seamless or ERW subtypes. The pipe features welded construction with precise threading for downhole stability.
Grade K55 Oil Well Casing
Grade K55 casing is a welded non-alloy steel pipe designed for intermediate oil well sections, offering higher collapse resistance than J55 grades. Classified under HTS 7306.29.2000 as 'other' iron/nonalloy steel casing for drilling, it supports cementing and pressure containment in drilling operations. Threads are typically BTC (Buttress Threaded and Coupled) for secure joints.
13-3/8 Inch Intermediate Casing
Intermediate casing of 13-3/8 inch diameter, non-alloy steel, welded for protecting unstable formations in multi-stage gas drilling. Under HTS 7306.29.2000 as 'other' casing, it provides zonal isolation and pressure integrity post-surface casing. Premium threading ensures collapse and burst resistance.
7 Inch Production Casing
7-inch non-alloy steel production casing for the final well completion phase in oil extraction, welded and threaded for cementing behind the pipe. HTS 7306.29.2000 covers this as 'other' iron/nonalloy drilling casing, optimized for flow assurance and sand control. Features VAM or similar premium connections.