Product Description

The Main Technical Specification of Spiral Drill Collar O.D. I.D. Connections inch mm inch mm 4-1/8 104.78 2 2-1/4 50.80 57.15 NC31,NC35 NC35 4-3/4 120.65 2 2-1/4 50.80 57.15 NC35, NC35,NC38(3 1/2IF) 6-1/4 158.75 2-1/4 2-1 3/16 57.15 71.44 NC46(4 IF) NC46(4 IF) 6-1/2 165.1 2-1/4 2-1 3/16 57.15 71.44 NC46(4 IF) NC46(4 IF) 7 177.8 2-1/4 2-1 3/16 57.15 71.44 NC50(4 1/2IF) NC50(4 1/2IF) 8 203.2 2-1 3/16 3 71.44 76.20 6 5/8REG 6 5/8REG 9 228.6 2-1 3/16 3 71.44 76.20 7 5/8REG 7 5/8REG 9-1/2 241.3 3 76.20 7 5/8REG 10 254 3 76.20 NC70 11 275.4 3 76.20 NC77