API 5CT OCTG buttress thread casing coupling

Specifications of OCTG tubing Dimension range (OD inch): 2-3/8----4-1/2 Dimension range (OD mm): 60.32----114.3 Type of upset: NUE, EUE, Plain end Standard: API SPEC 5CT Main Steel Grade: H40, J55, N80, N80Q, L80, L80-1, L80-9Cr, L80-13Cr, P110 etc Type of Tubing: Non-upset tubing (NU), External-upset tubing (EUE), Integrated Joint (IJ) Length:R1( 6.10-7.32m ), R2( 8.53-9.75m), R3(11.58-12.80m) Pipe Type: Seamless (SMLS) Surface Treatment: Anti-corrosion Water Based Paint