江苏和信—石油钻铤

钻铤螺纹
型号

外径D

内径d

长度Lmm

台肩倒角直径

参考的弯曲强度比

mm

In

mm

in

NC31-41(2-7/8IF)

104.8

4-1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.7

4-3/4

50.8

2

9150

114.7

2.58:1

NC38-50(3-1/2IF)

127.0

5

57.2

2-1/4

9150

121.0

2.38:1

NC44-60

152.4

6

57.2

2-1/4

9150/9450

144.5

2.49:1

NC44-60

152.4

6

71.4

2-13/16

9150/9450

144.5

2.84:1

NC44-62

158.8

6-1/4

57.2

2-1/4

9150/9450

149.2

2.91:1

NC46-62(4IF)

158.8

6-1/4

71.4

2-13/16

9150/9450

150.0

2.63:1

NC46-65(4IF)

165.1

6-1/2

57.2

2-1/4

9150/9450

154.8

2.76:1

NC46-65(4IF)

165.1

6-1/2

71.4