OD

ID

Length

mm

Bevel Diameter

mm

Connection

Bending Strength Ratio

in

mm

in

mm

3-1/8

79.4

1-1/4

31.8

9150

76.2

NC23-31

2.57: 1

3-1/2

88.9

1-1/2

38.1

9150

82.9

NC26-35
( 21/8IF)

2.42 :1

4-1/8

104.8

2

50.8

9150

100.4

NC31-41 
( 27/8IF )

2.43 :1

4-3/4

120.7

2

50.8

9150

114.7

NC35-47

2.58 :1

5

127

2-1/4

57.2

9150

121.0

NC38-50 
( 31/2IF )

2.38:1

6

152.4

2-1/4

57.2

9150 or 9450

144.5

NC44-60

2.49:1

6

152.4

2-13/16

71.4

9150 or9450

144.5

NC44-60

2.84:1

6-1/4

158.8

2-1/4

57.2

9150 or 9450

149.2

NC44-62

2.91:1

6-1/4

158.8

2-13/16

71.4

9150 or 9450

150.0

NC46-62 ( 4IF )

2.63:1

6-1/2

165.1

2-1/4

57.2

9150 or 9450

154.8

NC46-65 ( 4IF)

2.76:1

6-1/2

165.1

2-13/16

71.4

9150 or 9450

154.8

NC46-65 ( 4IF )

3.05:1

6-3/4

171.4

2-1/4

57.2

9150 or 9450

159.5

NC46-67 ( 4IF )

3.18:1

6-3/4

171.4

2-13/16

71.4

9150 or 9450

159.5

NC50-67( 41/2IF )

2.37:1

7

177.8

2-1/4

57.2

9150 or 9450

164.7

NC50-70 ( 41/2IF )

2.54 :1

7

177.8

2-13/16

71.4

9150 or 9450

164.7

NC50-70( 41/2IF )

2.73 :1

7-1/4

184.2

2-13/16

71.4

9150 or 9450

169.5

NC50-72 ( 41/2IF )

3.12 :1

7-3/4

196.8

2-13/16

71.4

9150 or 9450

185.3

NC56-77

2.70 :1

8

203.2

2-13/16

71.4

9150 or 9450

190.1

NC56-80

3.02 :1

8-1/4

209.6

2-13/16

71.4

9150 or 9450

195.7

65/8REG

2.93: 1

9

228.6

2-13/16

71.4

9150 or 9450

212.7

NC61-90

3.17 :1

9-1/2

241.3

3

76.2

9150 or 9450

223.8

75/8REG

2.81 :1

9-3/4

247.6

3

76.2

9150 or 9450

232.6

NC70-97

2.57 :1

10

254

3

76.2

9150 or 9450

237.3

NC70-100

2.81: 1

11

279.4

3

76.2

9150 or 9450

266.7

85/8REG

2.84 :1

Mechanical Properties of Non-magnetic Drill Collar