Drill Collar
Diameter
in |
Bore+1/16"
- 0"
in |
Connection |
Approximate Weight
Drill Collar
lb / ft |
Bending Strength
Ratio |
| 3 1/8 |
1 1/4 |
NC 23 (2 3/8Reg) |
22.00 |
2.57:1 |
| |
| 3 1/2 |
1 1/2 |
NC 26 (2 3/8 IF) |
26.70 |
2.42:1 |
| |
| 4 1/8 |
2 |
NC 31 (2 7/8 IF) |
33.65 |
2.43:1 |
| |
| 4 3/4 |
2 |
NC 35 |
46.81 |
2.58:1 |
| |
| 5 |
2 1/4 |
NC 38 (3 1/2 IF) |
53.29 |
2.38:1 |
| |
| 6 |
2 1/4 |
NC 44 |
82.61 |
2.49:1 |
| 6 |
2 13/16 |
NC 44 |
75.90 |
2.84:1 |
| |
|
|
|
|
| 6 1/4 |
2 1/4 |
NC 44 |
90.52 |
2.91:1 |
| 6 1/4 |
2 13/16 |
NC 46 (4 IF) |
83.81 |
2.63:1 |
| |
| 6 1/2 |
2 1/4 |
NC 46 (4 IF) |
99.52 |
2.76:1 |
| 6 1/2 |
2 13/16 |
NC 46 (4 IF) |
92.81 |
3.05:1 |
| |
| 6 3/4 |
2 1/4 |
NC 46 (4 IF) |
108.52 |
3.18:1 |
| |
| 7 |
2 1/4 |
NC 50 (4 1/2 IF) |
117.52 |
2.54:1 |
| 7 |
2 13/16 |
NC 50 (4 1/2 IF) |
110.77 |
2.73.1 |
| |
| 7 1/4 |
2 13/16 |
NC 50 (4 1/2 IF) |
119.81 |
3.12:1 |
| |
| 7 3/4 |
2 13/16 |
NC 56 |
139.9 |
2.70:1 |
| |
| 8 |
2 13/16 |
NC 56 |
150.81 |
3.02:1 |
| |
| 8 1/4 |
2 13/16 |
6 5/8 API Reg |
161.81 |
2.93:1 |
| |
| 9 |
2 13/16 |
NC 61 |
195.81 |
3.17:1 |
| |
| 9 1/2 |
3 |
7 5/8 API Reg |
217.00 |
2.81:1 |
| |
| 9 3/4 |
3 |
NC 70 |
230.00 |
2.57:1 |
| |
| 10 |
3 |
NC 70 |
242.97 |
2.81:1 |
| |
| 11 |
3 |
NC77(8 5/8 API Reg) |
299.00 |
2.84:1 |
|