Kelly Drive (for Drilling Rig)
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Owetech kelly drives are used to apply rotational force to the entire drill string and drill bit for the purpose of breaking ground. The drill string components transmit torque and bear all the weight of the drill string. Our square Kelly and hexagonal Kelly both meet API specifications and we have 5 models for customers to choose from. All Owetech Kelly bars are designed with drawing steel thread protector caps.
We also provide steel pipe packaging service to satisfy all of our customers' needs.
| Size | Length | Upper box connection | Lower pin connection | I.D. | Driving section | |||||||
| mm | in | (in) | Type(LH) | O.D. | Thread | O.D. | Cross flat | For square Kelly | Cross corner for hex | |||
| Std . | optional | Std . | optional | |||||||||
| 63.5 | 2 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146 | NC26 | 85.7 | 31.8 | 63.5 | 83.3 | |
| 76.2 | 3 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146 | NC31 | 104.8 | 44.4 | 76.2 | 100 | 85.7 |
| 88.9 | 3 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146 | NC38 | 120.6 | 57.2 | 88.9 | 115.1 | 100.8 |
| 108 | 4 1/4 | 12.9 | 6 5/8REG | 4 1/2REG | 196.8 | 146 | NC46 | 158.8 | 71.4 | 108 | 141.3 | 122.2 |
| 6 5/8REG | 4 1/2REG | 196.8 | 146 | NC50 | 161.9 | 71.4 | 108 | 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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