| Common Model of the kelly bar Unit :mm | |||||
| O.D mm | No. of sections | L(m) | Types | Nominal drilling Depth(m) | Drilling rigs matched with |
| 630 | 3,4,5,6 | 10~15 | Interlock,Friction | 36~143 | Sany,XCMG,Yutong,CRRC |
| 575 | 4,5,6 | 10~22 | Interlock,Friction | 36~122 | XCMG,CRRC |
| 559 | 3,4,5,6 | 10~20 | Interlock,Friction | 36~110 | Bauer,Soilmec,Casagrande |
| 540 | 3,4,5,6 | 10~20 | Interlock,Friction | 36~110 | Jintai |
| 530 | 3,4,5,6 | 10~20 | Interlock,Friction | 36~110 | XCMG,CRRC,Zoomlion |
| 508 | 3,4,5,6 | 10~17 | Interlock,Friction | 36~110 | Casagrande.XCMG,CRRC,Yutong,Sany |
| 470 | 3,4,5,6 | 10~17 | Interlock,Friction | 36~94 | Bauer,Casagrande,XCMG,Yutong,CRRC |
| 440 | 3,4,5,6 | 10~17 | Interlock,Friction | 36~94 | Mait HR200,R180.Sunward,Yutong |
| 427(419) | 4,5,6 | 10~15 | Interlock,Friction | 36~85 | CMV,IMT,Casagrande,XCMG |
| 406(394) | 4,5 | 10~17 | Interlock,Friction | 36~79 | Bauer,Soilmec,CMV,IMT,XCMG |
| 377(368) | 4,5 | 10~14 | Interlock,Friction | 36~65 | Bauer,Mait,XCMG,CRRC |
| 355 | 4,5 | 10~13 | Interlock,Friction | 36~60 | CMV,Soilmec |
| 340 | 4 | 10~13 | Interlock,Friction | 36~48 | Bauer |
| 299 | 4 | 10~13 | Interlock,Friction | 36~48 | Bauer,Soilmec,Sunward |
All kelly bars manufacturered with Six-Ribs structure, increase the using life and durability.
Seamless high quality steel ,ensuring the size accuracy with less tolerance, good welding on improving the wear resistance, reducing the issue rate and maintenance cost.
Advanced manufacturing equipment and producing tochnology ensuring the kelly bar finnally match to the standard of light weight, goog straight and high strength.
Completed varieties of interlock and friction to choose from.The Kelly bar are all used with full torque and the maximum drilling depth can reach to 140 meters.