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Kellys
Kellys is driving section of wohole drill stem
Kellys is driving section of wohole drill stem. Kelly is available with square kelly and hexagonal kelly. kelly are manufactured strictly from API Spec7-1 and SY/T6509-2000 standard.
Technical specification and parameters..
Size | Length | Upper box connection | Lower pin connection | I.D. | Driving section | |||||||
mm | in | Type(LH) | O.D. | Thread | O.D. | Cross flat | For square kelly | Cross corner for hexa kelly | ||||
Std | optional | Std | optional | |||||||||
63.5 | 2 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC26 | 85.7 | 31.8 | 63.5 | 83.3 |
|
76.2 | 3 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC31 | 104.8 | 44.4 | 76.2 | 100.0 | 85.7 |
88.9 | 3 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC38 | 120.6 | 57.2 | 88.9 | 115.1 | 100.8 |
108.0 | 4 1/4 | 12.9 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC46 | 158.8 | 71.4 | 108.0 | 141.3 | 122.2 |
6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC50 | 161.9 | 71.4 | 108.0 | 141.3 | 122.2 | |||
133.4 | 5 1/4 | 12.9 | 6 5/8REG |
| 196.8 |
| 5 1/2FH | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 |
6 5/8REG |
| 196.8 |
| NC56 | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 |
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