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.
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Import Tips & Compliance
• Include NACE compliance for sour service grades; verify Cr content for alloy status
• Pitfall: declaring as 'stainless' incorrectly
• Use proper dunnage to prevent thread damage
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