Oil Well Casing, OCTG
Dimension range (OD inch): 4-1/2 — 30 Inch
Dimension range (OD mm): 114.3 — 762mm
Standard: API SPEC 5CT, ISO 11960, GOST
Length: R1, R2, R3
Main Steel Grade: H40, J55, K55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr, P110, etc.
Type of Casing: Plain, BTC, STC, LTC, Other Premium Thread.