Kelly drill rods are widely used in oil and gas, geological exploration, and mining. It is typically available in square or hexagonal shapes, with various sizes and specifications, and can be customized to meet different drilling needs.
The active drill pipe is a key component of drilling equipment, primarily used to transmit torque and propulsion force, driving the drill bit to perform drilling operations. It is usually made of high-strength alloy steel, possessing excellent wear resistance and fatigue resistance.
| Nom Size (in) | Top Connection(LH) | Bottom Connection | L.D. (in) | Drive Section(in) | ||||
| Standard O.D. (in) | Optional O.D. (in) | Square O.D. (in) | Hex.O.D. (in) | Square | Hex. | A | B | |
| 2 1/2 | 6 5/8 REG LH 7 3/4 | 4 1/2 REG LH5 3/4 | NC26 3 3/8 | 1 1/4 | 3 1/4 | |||
| 3 | 6 5/8 REG LH 7 3/4 | 4 1/2 REG LH5 3/4 | NC31 4 1/8 | NC26 3 3/8 | 1 3/4 | 1 1/4 | 3 3/8 | 3 3/8 |
| 3 1/2 | 6 5/8 REG LH 7 3/4 | 4 1/2 REG LH5 3/4 | NC38 4 3/4 | NC31 4 1/8 | 2 1/4 | 1 3/4 | 4 7/16 | 3 15/16 |
| 4 1/4 | 6 5/8 REG LH 7 3/4 | 4 1/2REG LH 5 3/4 | NC46 6 1/4 | NC38 4 3/4 | 2 13/16 | 2 1/4 | 5 1/2 | 4 25/32 |
| 6 5/8 REG LH 7 3/4 | 4 1/2REG LH 5 3/4 | NC50 6 3/8 | NC38 4 3/4 | 2 13/16 | 2 1/4 | 5 1/2 | 4 25/32 | |
| 5 1/2 | 6 5/8 REG LH 7 3/4 | 5 1/2FH 7 | NC46 6 1/4 | 3 1/4 | 3 | 6 3/4 | 5 29/32 | |
| 6 5/8 REG LH 7 3/4 | NC56 7 | NC50 6 3/8 | 3 1/4 | 3 1/4 | 6 3/4 | 5 29/32 | ||
| 6 | 6 5/8 REG LH 7 3/4 | 5 1/2FH 7 | 3 1/2 | 6 13/16 | ||||
| 6 5/8 REG LH 7 3/4 | NC56 7 | 3 1/2 | 6 13/16 | |||||
