9-5/8 Inch 40 lb/ft K-55 Casing
Heavy seamless K-55 grade non-alloy steel casing with 355.6 mm OD, 12.7 mm wall thickness, and premium threaded/coupled connections for deep oil well applications. Classified under HTS 7304.29.1060 for its role in stabilizing boreholes during drilling, seamless iron/non-alloy steel construction, and meeting the exact size and thickness criteria. Ideal for high-yield formations requiring robust collapse resistance.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter not exceeding 285.8 mm
Smaller OD casing falls into the preceding subheading despite matching wall thickness and other specs.
If imported assembled into drilling parts/sets
When supplied as part of a drill pipe assembly or set for oilfield use, it shifts to parts of drilling machinery.
If other than threaded or coupled
Plain end (uncoupled) casing moves to the non-threaded/coupled casing subheading.
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Import Tips & Compliance
• Include detailed grade certificates (e.g
• K-55 per API 5CT) and thread type specs in entry docs to confirm drilling casing use
• Measure wall thickness precisely post-manufacture; even slight under 12.7 mm risks duty rate change or penalties
• Comply with Buy America provisions if for US projects; source documentation prevents customs holds
Related Products under HTS 7304.29.10.60
API 5CT L-80 Type 9 Casing Pipe
Seamless steel casing pipe made from non-alloy L-80 grade steel, with threaded couplings, outside diameter of 339.7 mm, and wall thickness of 14.5 mm, designed for oil and gas well drilling to line the borehole and prevent collapse. It falls under HTS 7304.29.1060 due to its seamless construction, non-alloy steel material, casing use, threaded/coupled ends, specified OD range, and wall thickness of 12.7 mm or more. This heavy-duty pipe meets API 5CT specifications for high-pressure environments.
13-3/8 Inch 68 lb/ft N-80 Casing Pipe
Seamless N-80 non-alloy steel casing pipe, 339.7 mm OD, 17.5 mm wall thickness, with BTC (Buttress Threaded and Coupled) connections for intermediate casing in gas wells. HTS 7304.29.1060 applies due to seamless non-alloy steel, drilling casing purpose, threaded/coupled design, OD between 285.8-406.4 mm, and thick walls ≥12.7 mm. Provides superior tensile strength for challenging drilling conditions.
10-3/4 Inch 51 lb/ft J-55 Casing
J-55 grade seamless non-alloy steel casing with 273.1 mm OD (exceeding 285.8 mm variant available), 14.0 mm wall, and EUE threaded couplings for shallow oil well protection. Meets HTS 7304.29.1060 criteria as seamless drilling casing of iron/non-alloy steel, threaded/coupled, in the specified OD range with thick walls. Commonly used in surface casing strings.
12-1/4 Inch 57 lb/ft P-110 Casing
High-strength P-110 seamless casing from non-alloy steel, 311.2 mm OD adjusted to range, 16.0 mm wall thickness, premium class threaded and coupled for HP/HT wells. HTS 7304.29.1060 covers this as seamless iron/non-alloy steel oil/gas casing with required dimensions and connections. Engineered for extreme pressures in deep drilling.