Downhole – Drill Collars
| OD |
ID |
Connection |
| 3 1/8" (79 mm) |
1 1/4" (32 mm) |
HT PAC |
| 3 1/8" (79 mm) |
1 1/2 (38 mm) |
WT23 |
| 3 3/8" (86 mm) |
1 3/4" (44 mm) |
WT26 |
| 4 3/4" (121 mm) |
2 1/4" (57 mm) |
3 1/2" PH6 |
| 4 3/4" (121 mm) |
2 1/4" (57 mm) |
NC38 |
| 4 3/4" (121 mm) |
2 5/16" (59 mm) |
NC38 |
| 4 3/4" (121 mm) |
2 9/16" (65 mm) |
WT38 |
| 6 1/2" (165 mm) |
2 13/16" (71 mm) |
NC50 |
| 7" (178 mm) |
4" (102 mm) |
WT56 |
| 8" (203 mm) |
2 13/16" (71 mm) |
6 5/8" REG |
| 9 1/2" (241 mm) |
3" (76 mm) |
7 5/8" REG |
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