Drill collar thread |
OD D |
ID d |
Length L
mm
|
Ledge Chamfer DIA. Df mm |
Bending Strength Ratio |
||
mm |
in |
mm |
in |
||||
NC31-41(27/8IF) |
104.8 |
4 1/8 |
50.8 | 2 | 9150 |
100.4 |
2.43:1 |
NC35-47 |
120.7 |
4 3/4 |
50.8 |
2 |
9150 |
114.7 |
2.58:1 |
NC38-50(31/2IF) |
127.0 |
5 |
57.2 |
2 1/4 |
9150 |
121.0 |
2.38:1 |
NC44-60 |
152.4 |
6 |
57.2 |
2 1/4 |
9150or9450 |
144.5 |
2.49:1 |
NC44-60 |
152.4 |
6 |
71.4 |
2 13/16 |
9150or9450 |
144.5 |
2.84:1 |
NC44-62 |
158.8 |
61/4 |
57.2 |
2 1/4 |
9150or9450 |
149.2 |
2.91:1 |
NC46-62(4IF) |
158.8 |
61/4 |
71.4 |
2 13/16 |
9150or9450 |
150.0 |
2.63:1 |
NC46-65(4IF) |
165.1 |
61/2 |
57.2 |
2 1/4 |
9150or9450 |
154.8 |
2.76:1 |
NC46-65(4IF) |
165.1 |
61/2 |
71.4 |
2 13/16 |
9150or9450 |
154.8 |
3.05:1 |
NC46-67(4IF) |
171.4 |
63/4 |
57.2 |
2 1/4 |
9150or9450 |
159.5 |
3.18:1 |
NC50-67(41/2IF) |
171.4 |
63/4 |
71.4 |
2 13/16 |
9150or9450 |
159.5 |
2.37:1 |
NC50-70(41/2IF) |
177.8 |
7 |
57.2 |
2 1/4 |
9150or9450 |
164.7 |
2.54:1 |
NC50-70(41/2IF) |
177.8 |
7 |
71.4 |
2 13/16 |
9150or9450 |
164.7 |
2.73:1 |
NC50-72(41/2IF) |
184.2 |
71/4 |
71.4 |
2 13/16 |
9150or9450 |
169.5 |
3.12:1 |
NC56-77 |
196.8 |
73/4 |
71.4 |
2 13/16 |
9150or9450 |
185.3 |
2.70:1 |
NC56-80 |
203.2 |
8 |
71.4 |
2 13/16 |
9150or9450 |
190.1 |
3.02:1 |
65/xREG |
209.6 |
81/4 |
71.4 |
2 13/16 |
9150or9450 |
195.7 |
2.93:1 |
NC61-90 |
228.6 |
9 |
71.4 |
2 13/16 |
9150or9450 |
212.7 |
3.17:1 |