Type de filetage commun des outils de forage API

Type de filetage de joint standard API

Outils / pouces

PIN DIA

NC26 = 2-3 / 8 '' IF

4

60.35mm

NC31 = 2-7 / 8 '' IF

4

71.31mm

NC38 = 3-1 / 2 '' IF

4

85.06mm

NC40 = 4 '' IF

4

98.06mm

NC44 = 4 '' IF

4

98.42mm

NC46 = 4 '' IF

4

103.73mm

NC50 = 4-1 / 2 '' IF

4

114.30mm

NC56

4

117.50mm