Specification for Square Kelly
| Nom Size (in) | Lengths (ft) | Top Upset Joint | Bottom Upset | Bore | Drive Section | Weight (kg) | |||||||
Standard | Optional | ||||||||||||
A | B | LH Connection | OD C | LH Connection | OD C | RH Connection | OD D | E | F | G | Standard | Optional | |
(in) | (in) | (in) | (in) | (in) | (in) | ||||||||
2 1/2 | 40 46 | 37 43 | 6 5/8 Reg | 7 3/4 | 4 1/2 Reg | 5 3/4 | NC26 (2 3/8 IF) | 3 3/8 | 1 1/4 | 3 1/4 | 2 1/2 | 410 465 | 360 420 |
3 | 40 46 | 37 43 | 6 5/8 Reg | 7 3/4 | 4 1/2 Reg | 5 3/4 | NC31 (2 7/8 IF) | 4 1/8 | 1 3/4 | 3 7/8 | 3 | 495 560 | 450 515 |
3 1/2 | 404654 | 37 43 51 | 6 5/8 Reg | 7 3/4 | 4 1/2 Reg | 5 3/4 | NC38 (3 1/2 IF) | 4 3/4 | 2 1/4 | 4 3/7 | 3 1/2 | 600 670 780 | 555 630 730 |
4 1/4 | 404654 | 37 43 51 | 6 5/8 Reg | 7 3/4 | 4 1/2 Reg | 5 3/4 | NC46(4 IF)orNC50(4 1/2 IF) | 6or6 3/8-6 1/2 | 2 4/5 | 5 1/2 | 4 1/4 | 825 940 1070 | 780 890 1040 |
5 1/4 | 40 46 54 | 37 43 51 | 6 5/8 Reg | 7 3/4 | -- | -- | NC50or 5 1/2 FH orNC56 | 7 | 3 1/4 | 6 3/4 | 5 1/4 | 1250 1430 1670 | -- |
6 | 40 46 54 | 37 43 51 | 6 5/8 Reg | 7 3/4 | -- | -- | 6 5/8 FH | 8 | 3 1/2 | 7 5/8 | 6 | 1670 1920 2250 | -- |
