.

 

Drill collar

Connection

Outside Diameter

Inside Diameter

Length

mm(in)

Bevel Diameter

Ref. Bend Strength ratio

mm

in

mm

in

NC23-31

79.4

3-1/8

31.8

1-1/4

9150(30)

76.2(3)

2.57:1

NC26-35(2-3/8IF)

88.9

3-1/2

38.1

1-1/2

9150(30)

82.9(3 1/4)

2.42:1

NC31-41(2-7/8IF)

104.8

4-1/8

50.8

2

9150(30)

100.4(3 15/16)

2.43:1

NC35-47

120.7

4-3/4

50.8

2

9150(30)

114.7(4 1/2)

2.58:1

NC38-50(3-1/2IF)

127.5

5

57.2

2-1/4

9150(30)

121(4 3/4)

2.38:1

NC44-60

152.4

6

57.2

2-1/4

9150(30)or9450(31)

144.5(5 11/16)

2.49:1

NC44-60

152.4

6

71.4

2-13/16

9150(30)or9450(31)

144.5(5 11/16)

2.84:1

NC44-62

158.8

6-1/4

57.2

2-1/4

9150(30)or9450(31)

149.2(5 7/8)

2.91:1

NC46-62(4 IF)

158.8

3-1/4

71.4

2-13/16

9150(30)or9450(31)

150.0(5.9)

2.63:1

NC46-65(4 IF)

165.1

6-1/2

71.4

2-13/4

9150(30)or9450(31)

154.8(6 1/16)

2.76:1

NC46-65(4 IF)

165.1

6-1/2

71.4

2-13/16

9150(30)or9450(31)

154.8(6 1/16)

3.05:1

NC46-67(4 IF)

165.1

6-1/2

71.4

2-13/16

9150(30)or9450(31)

154.8(6 1/16)

3.18:1

NC50-67(4-1/2IF)

171.4

6-3/4

71.4

2-13/16

9150(30)or9450(31)

159.5(6 1/4)

2.37:1

NC50-70(4-1/2IF)

177.8

7

57.2

2-1/4

9150(30)or9450(31)

164.7(6 1/4)

2.54:1

NC50-70(4-1/2IF)

177.8

7

71.4

2-13/16

9150(30)or9450(31)

164.7(6 1/2)

2.73:1

NC50-72(4-1/2IF)

184.2

7-1/4

71.4

2-13/16

9150(30)or9450(31)

169.5(6 11/16)

3.12:1

NC56-77

196.8

7-3/4

71.4

2-13/16

9150(30)or9450(31)

185.3(7 1/4)

2.70:1

NG56-80

203.2

8

71.4

2-13/16

9150(30)or9450(31)

190.1(7 1/2)

3.02:1

6 5/8REG

209.6

8-1/4

71.4

2 13/16

9150(30)or9450(31)

195.7(7 11/16)

2.93:1

NC61-90

228.6

9

71.4

2-13/16

9150(30)or9450(31)

212.7(8 3/8)

3.17:1

7-5/8REG

241.3

9-1/2

76.2

3

9150(30)or9450(31)

223.8(8 13/16)

2.81:1

NC70-97

247.6

9-3/4

76.2

3

9150(30)or9450(31)

232.6(9 1/8)

2.57:1

NC70-100

254

10

76.2

3

9150(30)or9450(31)

237.3(9 3/8)

2.81:1

8-5/8REG

279.4

11

76.2

3

9150(30)or9450(31)

266.7(10 1/2)

2.84:1