18-5/8 Inch N80 Threaded Drilling Casing
Threaded nonalloy steel casing pipe with 18-5/8 inch OD, N80 grade, welded for use in stabilizing boreholes during oil and gas extraction. It matches HTS 7305.20.20.00 as a large-diameter (>406.4 mm), circular cross-section pipe that is threaded or coupled and designated for drilling casing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless and of stainless steel
Seamless stainless steel drilling casing shifts to 7304 for seamless tubes of alloy/stainless steel.
If alloy steel construction
Alloy steel versions of threaded drilling casing are under the alloy steel subheading 7305.20.50.
If imported as assembled gas drilling equipment part
If imported mounted in drilling machinery, it may classify as a part of gas drilling equipment.
Not sure which classification is right?
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Import Tips & Compliance
• Provide end-user declarations specifying oil/gas drilling use to distinguish from other tubular goods
• Ensure customs review of coupling type (integral or threaded-and-coupled) for accurate subheading placement
• Avoid delays by pre-submitting API monogram or equivalent quality certifications
Related Products under HTS 7305.20.20.00
Intermediate Casing Pipe 17-1/2 Inch Coupled N80
17-1/2 inch OD coupled N80 nonalloy steel intermediate casing for mid-depth oil/gas well support, welded with threaded connections. Under HTS 7305.20.20.00 as oversized circular cross-section pipe for drilling, of iron/nonalloy steel, threaded or coupled.
Production Casing 13-3/8 Inch L80 Threaded
13-3/8 inch OD L80 threaded production casing pipe of welded nonalloy steel, used after drilling to case the productive zone. Matches HTS 7305.20.20.00: large-diameter (>406.4 mm equivalent in function), circular, threaded for oil/gas drilling.
API 5CT J55 Threaded Casing Pipe
This is a large-diameter (over 16 inches) welded steel casing pipe made from J55 grade nonalloy steel, featuring threaded ends for coupling in oil well drilling operations. It falls under HTS 7305.20.20.00 because it has a circular cross-section exceeding 406.4 mm external diameter, is threaded or coupled, and is specifically designed as casing for oil or gas drilling.
20-Inch OD K55 Coupled Oil Well Casing
A 20-inch outer diameter coupled casing pipe from K55 nonalloy steel, used to line and stabilize oil or gas wells during drilling. Classified under HTS 7305.20.20.00 due to its welded construction, threaded/coupled joints, circular cross-section over 406.4 mm, and specific use in drilling operations.
16-Inch OD L80 Coupled Casing for Gas Wells
Welded L80 grade nonalloy steel casing with 16-inch OD and coupled ends, essential for protecting and supporting gas well bores. This product is under HTS 7305.20.20.00 for its oversized circular cross-section, threading/coupling, iron/nonalloy steel material, and drilling-specific design.
22-Inch Diameter P110 Threaded Oil Casing Pipe
High-strength P110 grade nonalloy steel pipe, 22-inch OD, threaded for coupling, used in deep oil drilling to case the wellbore. Fits HTS 7305.20.20.00 precisely as welded, large-diameter (>16 inches), circular steel tube for oil drilling with threaded connections.