Description of Horizontal Directional Drilling HDD Drill pipe For Installation Of Underground Utilities
HDD drill pipe is a tool applicable for transferring torque and tension of drillers in the process of directional drilling construction. Due to the fact that it has to bear torsion, tension, bending, friction and vibration in the process of directional construction, the requirements for processing process are very strict.
The raw materials selected by our company are all the alloy structure steels for geographical usage produced by Baogang Steel. After laboratory tests, both ends of a pipe are upsetted and proceeded to overall heat treatment, then friction welded. Before finished drill pipes are plated and packaged, a series of tests have to be implemented including hardness, metallurgical structure, physical performances, etc.
Specification of the forged drill pipe for Vemeer HDD machine
| Specification of the forged drill Pipe for Vermeer HDD machine |
| Model Of the rig | Connection | Dimension of the drilling Pipe | Tempering and Quenching | Min Bending Radius | Max Torque |
| OD of the Tube | Wall Thickness | OD of the joints /upset | Working Length | Weight |
| (mm) | (mm) | (mm) | (mm) | ( kg) | Grade | (m) | Nm |
| D7×11, D9X13 | Firestick 1 | 42 | 6.5 | 48 | 1829 | 12 | S135 | 29 | 2000 |
| D10X14,D10X15 | Firestick 1 | 42 | 6.5 | 48 | 3048 | 20 | S135 | 29 | 2000 |
| D16×20,D18×22 | Firestick 1 | 48 | 6.5 | 54 | 3048 | 23.5 | S135 | 30 | 3000 |
| D24X26 | Firestick 1 | 54 | 7 | 57 | 3048 | 25 | S135 | 31 | 4000 |
| D24×40 | Firestick 1 | 60.3 | 7.5 | 66.7 | 3048 | 35 | S135 | 33 | 6300 |
| D40X40 | Firestick 1 | 60.3 | 7.5 | 66.7 | 4572 | 50 | S135 | 33 | 6300 |
| D33×44, D36×50 | Firestick 1 or 2 | 60.3 | 7.5 | 70 | 3048 | 36 | S135 | 33 | 6772 |
| D33×44, D36×50 | Firestick 1 or 2 | 60.3 | 7.5 | 70 | 4572 | 51 | S135 | 33 | 6772 |
| D36×50 | Firestick 1 | 60.3 | 7.5 | 70 | 3048 | 36 | S135 | 33 | 6772 |
| D36×50 | Firestick 1 | 60.3 | 7.5 | 70 | 4572 | 51 | S135 | 33 | 6772 |
| D36×50 | Firestick 1 | 66.7 | 8 | 78 | 3048 | 40 | S135 | 40 | 9000 |
| D36×50 | Firestick 1 | 66.7 | 8 | 78 | 4572 | 55 | S135 | 40 | 9000 |
| D50×100/Uni60x70 | Firestick 1 | 73 | 10 | 83 | 3048 | 55 | S135 | 51 | 16000 |
| D50×100 | Firestick 1 | 73 | 10 | 83 | 4572 | 78 | S135 | 51 | 16000 |
| D50X100/D80×100 | Firestick 1 | 89 | 10 | 92 | 4572 | 96 | S135 | 72 | 18000 |
| D100×120 | Firestick 2 | 89 | 10 | 104 | 6096 | 130 | S135 | 72 | 24000 |
| D100×120 | Firestick 1 | 89 | 11.5 | 111.5 | 6096 | 150 | S135 | 80 | 27000 |
Technical Parameters:
| Grade | Yield Strength | Tensile Strength | Extension Rate | Impact Power Akv J |
| Min | Max | Min | Min | 10×10 |
| Psi | Mpa | Psi | Mpa | Psi | Mpa | % | (-20°C) |
| G105 | 105,000 | 724 | 135,000 | 931 | 115,000 | 793 | 15 | ≥68 |
| S135 | 135,000 | 931 | 165,000 | 1138 | 145,000 | 1000 | 13 | ≥54 |
Advantage:
Excellent forging tech in China.
Adopting double shoulder for improving mechanical property.
