Drill Collar

Size

(in)

O.D

(mm)

I.D.

(in)

Thread

Length

(mm)

Weight

(kg)

3 1/8

79.4

1-1/4

NC23

9150

298

3 1/2

88.9

1-1/2

NC26

9150

364

4 1/8

104.8

2

NC31

9150/9450

474/490

4 3/4

120.6

2

NC35

9150/9450

674/697

5

127

2-1/4

NC38

9150/9450

725/749

6

152.4

2-1/4

NC44

9150/9450

1125/1163

6

152.4

2-13/16

NC44

9150/9450

1022/1056

6 1/4

158.8

2-1/4

NC44

9150/9450

1237/1279

6 1/4

158.8

2-13/16

NC44

9150/9450

1134/1172

6 1/2

165.1

2-1/4

NC46

9150/9450

1352/1398

6 1/2

165.1

2-13/16

NC50

9150/9450

1249/1291

6 3/4

171.4

2-1/4

NC46

9150/9450

1471/1521

7

177.8

2-1/4

NC50

9150/9450

1597/1651

7

177.8

2-13/16

NC50

9150/9450

1494/1545

7 1/4

184.2

2-13/16

NC50

9150/9450

1625/1680

7 3/4

196.8

2-13/16

NC56

9150/9450

1895/1960

8

203.2

2-13/16

NC56 or 6- 5/8REG

9150/9450

2040/2109

8 1/4

209.6

2-13/16

6-5/8REG

9150/9450

2188/2263

9

228.6

2-13/16

NC61

9150/9450

2658/2748

9 1/2

241.3

2-13/16

7-5/8REG

9150/9450

2954/3054

9 3/4

247.6

3

NC70

9150/9450

3127/3234

10

254

3

NC70

9150/9450

3308/3421

11

279.4

3

8-5/8REG

9150/9450

4072/4210