13-3/8 Inch K55 Production Casing
Heavy-duty seamless K55 nonalloy steel casing, 13-3/8 inch diameter for production zones in oil wells. Designed for high-pressure environments post-drilling. HTS 7304.29.20 covers this as other nonalloy casing.
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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 made of stainless steel
Stainless composition shifts to Chapter 73 heading 7307 for ferritic stainless tubes.
If having attached fittings or couplings
Casing with integral fittings classified as tube/pipe fittings under 7304.29.50.
If imported as drill pipe component
If primarily functioning in drilling rather than lining, may fall under oilfield machinery parts.
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Import Tips & Compliance
• Obtain third-party inspection reports (e.g
• SGS) verifying seamless manufacture and K55 yield strength
• Comply with API monogram requirements; customs may request proof for duty-free claims if applicable
Related Products under HTS 7304.29.20
6-5/8 Inch Production Tubing Casing
Dual-use 6-5/8 inch J55 seamless casing/tubing for production. Classified as casing.
12-1/4 Inch Scab Liner Casing
Repair scab liner 12-1/4 inch N80 seamless for damaged wells. Nonalloy steel.
14 Inch Intermediate Liner J55
14 inch J55 seamless intermediate liner for zonal isolation.
23-3/8 Inch Surface Conductor Casing
Extra-large 23-3/8 inch K55 conductor for surface support. Seamless nonalloy.
20 Inch Conductor Casing J55
Large-diameter 20-inch seamless J55 nonalloy steel conductor casing for initial wellbore support in offshore drilling. Stabilizes surface formations. Classified 7304.29.20 as other casing.
10-3/4 Inch Intermediate Casing P110
High-strength P110 seamless nonalloy casing for intermediate sections, 10-3/4 inch. For deep high-pressure wells. 7304.29.20 classification.