IMT Full Interlock Kelly Bar AF300 OD482mm Kelly Bar
Combined-interlock Kelly bar is composed by interlock Kelly bar and full multi-interlock Kelly bar.
For this type of Kelly bar , the first section is 3-keys interlock type, inner few sections are multi-type step keys , the outer keys are three sections three set of concave and convex form .
Combined-interlock Kelly bar is based on domestic rig configuration and condition demand, combined with the home and abroad advanced manufacture technology, supporting domestic and foreign rotary piling rig.
This type Kelly bar have been applied for patent, the patent No. is 201420542676.9
|
No. |
OD |
Section |
Way of crowding |
Length of per section(m) |
Drill depth |
Torque |
||
| 1 | ¢440 | 3 | 4 | 5 | interlock-type | 9 - 15 | 24 – 55 | 220-260 |
| 2 | ¢470(482) | 3 | 4 | 5 | interlock-type | 9 - 15 | 24 – 70 | 230-280 |
| 3 | ¢508 | 3 | 4 | 5 | interlock-type | 9 – 15 | 24 – 70 | 260-360 |
| 4 | ¢530(540) | 3 | 4 | 5 | interlock-type | 9 – 18 | 24 – 85 | 360-420 |
| 5 | ¢575(580) | 3 | 4 | 5 | interlock-type | 9 – 18 | 24 – 85 | 420-460 |
| 6 | ¢630 | 3 | 4 | 5 | interlock-type | 9 – 20 | 24 – 92 | 460-550 |
