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Drill Collar
 

Item

O.D

I.D

Length
(mm)

Bevel
Diameter

Ref Bend & Strength Ratio

(mm)

(in)

(mm)

(in)

NC23-31

79.4

3 1/8

31.8

1 1/2

9150

76.2

2.57:1

NC26-35(2 3/8 IF)

88.9

3 1/2

38.1

1 1/2

9150

82.9

2.42:1

NC31-41(2 7/8 IF)

104.8

4 1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.6

4 3/4

50.8

2

9150

114.7

2.58:1

NC38-50(3 1/2 IF)

127.0

5

57.2

2 1/2

9150

121.0

2.38:1

NC44-60

152.4

6

57.2

2 1/2

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

NC44-62(4IF)

158.8

6 1/4

71.4

2 13/16

9150 & 9450

150.0

2.63:1

NC44-65(4IF)

165.1

6 1/2

57.2

2 1/4

9150 & 9450

154.8

2.76:1

NC44-65(4IF)

165.1

6 1/2

71.4

2 13/16

9150 & 9450

154.8

3.05:1

NC47-67(4IF)

171.4

6 3/4

57.2

2 1/4

9150 & 9450

159.5

3.18:1

NC50-67(4 1/2 IF)

171.4

6 3/4

71.4

2 13/16

9150 & 9450

159.5

2.37:1

NC50-70 (4 1/2 IF)

177.8

7

71.4

2 13/16

9150 & 9450

164.7

2.73:1

NC50-72(4 1/2 IF)

184.2

7 1/4

71.4

2 13/16

9150 & 9450

169.5

3.12:1

NC56-77

196.8

7 3/4

71.4

2 13/16

9150 & 9450

185.3

2.70:1

NC5680

203.2

8

71.4

2 13/16

9150 & 9450

190.1

3.02:1

6 5/8 REG

209.6

8 1/4

71.4

2 13/16

9150 & 9450

195.7

2.93:1

NC61-90

228.6

9

71.4

2 13/16

9150 & 9450

212.6

3.17:1

7 5/8 REG

241.3

9 1/2

76.2

3

9150 & 9450

223.8

2.81:1

NC70-97

247.6

9 3/4

76.2

3

9150 & 9450

232.8

2.57:1

NC70-100

254

10

75.2

3

9150 & 9450

237.3

2.81:1

8 5/8 REG

279.4

111

76.2

3

9150 & 9450

266.7

2.84:1

 
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