Threaded or coupled
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
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
Subheadings
Products classified under HTS 7304.29.31
13-3/8 inch 72# P110 Threaded Casing
Seamless alloy steel oil well casing with 13-3/8 inch outer diameter, 72 lb/ft weight, and P110 grade, featuring API threaded couplings for secure connections in drilling operations. Classified under HTS 7304.29.31 due to its seamless construction from other alloy steel, specific design for oil/gas drilling, and threaded or coupled ends. This heavy-duty pipe withstands high-pressure environments in deep wells.
9-5/8 inch 43.5# L80 Threaded Casing
Seamless L80 grade alloy steel casing pipe, 9-5/8 inch OD, 43.5 lb/ft, with premium threaded and coupled joints for intermediate oil well sections. Fits HTS 7304.29.31 as seamless 'other alloy steel' casing designed for oil/gas drilling applications. Provides corrosion resistance and structural integrity in harsh subsurface conditions.
7 inch 32# T95 Coupled Casing
High-strength T95 alloy steel seamless casing, 7 inch diameter, 32 lb/ft weight, with integral threaded couplings for production zones in oil wells. Classified in 7304.29.31 for its seamless alloy steel composition tailored for drilling, offering superior tensile strength. Essential for isolating reservoir sections during extraction.
4-1/2 inch 12.6# Q125 Threaded Casing
Ultra-high yield Q125 grade seamless alloy steel liner casing, 4-1/2 inch OD, 12.6 lb/ft, threaded for challenging high-pressure drilling. Meets HTS 7304.29.31 criteria as 'other alloy steel' seamless pipe for oil/gas casing applications. Used in slim-hole completions and extended-reach wells.
10-3/4 inch 54.5# C110 Coupled Casing
C110 grade seamless alloy steel surface casing, 10-3/4 inch OD, 54.5 lb/ft, with coupled threads for conductor pipe in offshore rigs. HTS 7304.29.31 applies to its seamless 'other alloy steel' design for oil/gas drilling stability. Resists collapse in unconsolidated formations.
16 inch 94# P110 Alloy Casing
Heavy-wall 16 inch OD, 94 lb/ft P110 seamless alloy steel casing for large-diameter water disposal wells in oilfields. Threaded and coupled ends secure it under HTS 7304.29.31 as specialized drilling casing of other alloy steel. Handles high-volume fluid injection.
5-1/2 inch 20# L80 Type 9Cr Casing
9Cr martensitic alloy steel seamless casing, 5-1/2 inch, 20 lb/ft, L80 grade with threaded couplings for corrosive CO2 environments in gas wells. Precisely matches HTS 7304.29.31 for alloy steel drilling casing. Enhances longevity in acidic formations.
8-5/8 inch 36# P110 BTC Casing
8-5/8 inch OD, 36 lb/ft P110 seamless alloy casing with Buttress Threaded and Coupled (BTC) connections for intermediate production strings. HTS 7304.29.31 designation for seamless other alloy steel oil/gas casing. Balances strength and running ease.
20 inch 133# Q125 Conductor Casing
Ultra-heavy 20 inch, 133 lb/ft Q125 alloy steel seamless conductor casing, threaded for structural support in deepwater drilling. Falls under HTS 7304.29.31 as high-strength alloy steel for oil/gas well construction. Drives through soft seabed formations.
3-1/2 inch 9.3# C95 Tieback Casing
Lightweight 3-1/2 inch OD, 9.3 lb/ft C95 alloy seamless tieback casing with threaded premium connections for subsea wellheads. HTS 7304.29.31 covers this specialized drilling casing of other alloy steel. Connects riser to wellhead systems.