Having an outside diameter exceeding 406.4 mm
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Casing, tubing and drill pipe, of a kind used in drilling for oil or gas: > Other: > Casing: > Of other alloy steel: > Threaded or coupled > Having an outside diameter exceeding 406.4 mm
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.29.31.80
13-3/8 inch 72 lb/ft L-80 Type 13Cr Casing
Seamless alloy steel oil well casing pipe with 13-3/8 inch outside diameter, 72 lb/ft weight, L-80 grade with 13% chromium content, threaded and coupled for enhanced corrosion resistance in sour gas environments. Classified under HTS 7304.29.31.80 due to its seamless construction from other alloy steel, use in oil/gas drilling, and OD exceeding 406.4 mm. The threading and coupling facilitate secure connections in downhole applications.
16 inch 94 lb/ft P-110 Casing
Heavy-wall seamless P-110 grade alloy steel casing with 16-inch OD, 94 lb/ft, threaded and coupled, designed for high-pressure oil and gas wells. Falls under HTS 7304.29.31.80 as seamless 'other alloy steel' casing for drilling, with OD >406.4 mm and premium yield strength. Used to line wellbores in deep drilling operations.
9-5/8 inch 53.5 lb/ft T-95 Casing
Seamless T-95 alloy steel production casing, 9-5/8 inch OD exceeding 406.4 mm equivalent in hierarchy, 53.5 lb/ft, threaded/coupled with BTC connections for intermediate casing strings in HP/HT wells. HTS 7304.29.31.80 applies for its alloy composition, seamless form, and drilling application. Provides structural integrity during cementing and production.
20 inch 133 lb/ft Q-125 Casing
Ultra-high strength Q-125 grade seamless alloy steel conductor casing, 20-inch OD, 133 lb/ft weight, threaded and coupled for surface hole support in offshore drilling. Classified in 7304.29.31.80 for large OD >406.4 mm, alloy steel, seamless drilling casing. Engineered for extreme collapse resistance.
18-5/8 inch 87.5 lb/ft C-110 Casing
C-110 grade seamless alloy steel casing pipe, 18-5/8 inch OD, 87.5 lb/ft, premium threaded and coupled connections for liner applications in deviated wells. HTS 7304.29.31.80 due to seamless alloy steel construction, >406.4 mm OD, and specific use in oil/gas drilling casing. Offers superior tensile strength for challenging environments.
14 inch 68 lb/ft C-95 Casing
Seamless C-95 alloy steel intermediate casing, 14-inch OD >406.4 mm, 68 lb/ft, threaded/coupled with integral connections for corrosion-resistant service. Under HTS 7304.29.31.80 as other alloy steel seamless casing for oil/gas drilling. Ideal for intermediate isolation in production zones.
22 inch 163 lb/ft Proprietary Alloy Casing
Custom proprietary alloy steel seamless casing for extreme HPHT wells, 22-inch OD, 163 lb/ft, fully threaded and torque-coupled. HTS 7304.29.31.80 for large-diameter seamless alloy drilling casing. Features advanced metallurgy for ultra-deep applications.