Description
Drill
Collars are made of modified AISI 4145H or 4145H modified alloy steel.
These drill collar bars are full-length heat treated and water quenched.
Its bores are trepanned from one direction with no mismatch.
Drill Collar
Parameter
|
OD |
Bore |
Length |
Connection Type |
Reference Bending Strength Ratio |
|
inch |
inch |
ft |
||
|
41/8 |
2 |
30 |
NC31-41(23/4IF) |
2.43:1 |
|
43/4 |
2 |
30 |
NC35-47 |
2.58:1 |
|
5 |
21/4 |
30 |
NC38-50(31/2IF) |
2.38:1 |
|
6 |
21/4 |
30 or 31 |
NC44-60 |
2.49:1 |
|
6 |
213/16 |
30 or 31 |
NC44-60 |
2.84:1 |
|
61/4 |
21/4 |
30 or 31 |
NC44-62 |
2.91:1 |
|
61/4 |
213/16 |
30 or 31 |
NC46-62(4IF) |
2.63:1 |
|
61/2 |
21/4 |
30 or 31 |
NC46-65(4IF) |
2.76:1 |
|
61/2 |
213/16 |
30 or 31 |
NC46-65(4IF) |
3.05:1 |
|
63/4 |
21/4 |
30 or 31 |
NC46-67(4IF) |
3.18:1 |
|
63/4 |
213/16 |
30 or 31 |
NC50-6731(41/2IF) |
2.37:1 |
|
7 |
21/4 |
30 or 31 |
NC50-70(41/2IF) |
2.54:1 |
|
7 |
213/16 |
30 or 31 |
NC50-70(41/2IF) |
2.73:1 |
|
71/4 |
213/16 |
30 or 31 |
NC50-72(41/2IF) |
3.12:1 |
|
73/4 |
213/16 |
30 or 31 |
NC56-77 |
2.70:1 |
|
8 |
213/16 |
30 or 31 |
NC56-80 |
3.02:1 |
|
81/4 |
213/16 |
30 or 31 |
65/8REG11 |
2.93:1 |
|
9 |
213/16 |
30 or 31 |
NC61-90 |
3.17:1 |
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