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 has applied for patent, the patent No. is 201420542676.9
Combined-interlock Kelly bar is composed of 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 with 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 has applied for patent, the patent No. is 201420542676.9
Specification
|
No. |
Diammeter of The First Section
|
Sections |
Key Pressure Type |
Length of per section(m) |
Drill depth |
Torque(KN.M) |
||
|
1 |
¢440 |
3 |
4 |
|
Interlocking |
9 - 15 |
24 – 55 |
220-260 |
|
2 |
¢470(482) |
3 |
4 |
|
Interlocking |
9 - 15 |
24 – 65 |
230-280 |
|
3 |
¢508 |
3 |
4 |
|
Interlocking |
9 – 15 |
24 – 70 |
260-360 |
|
4 |
¢530(540) |
3 |
4 |
5 |
Interlocking |
9 – 18 |
24 – 85 |
360-420 |
|
5 |
¢575(580) |
3 |
4 |
5 |
Interlocking |
9 – 18 |
24 – 85 |
420-460 |
|
6 |
¢630 |
3 |
4 |
5 |
Interlocking |
9 – 20 |
24 – 92 |
460-550 |
