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2020-12-29
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IMT-type Interlock kelly bar
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Multi -interlocking Kelly bar is composed by three weld-on ribs with continuous concave and convex keys (see chart)
During the drilling process, the downward thrust is transmitted to drill bucket directly by rotation power of Rotary head inner ribs and Kelly bar outer ribs at any time . This type of Kelly bar is the best one of transferring pressure , especially for hard ground and frozen oil layer. In the drilling process , every continuous steps can form pressure point to reduce wear and tear of local pressurization key lines, also to avoid the stick problem that Kelly pipe is deformation always in a part pressurization.
When drilling progress, driving the inner convex concave tooth key and the outer convex concave tooth key uniformly forms good engagement, the advantage is force uniform, not easy to stick pipe, particularly to improve work efficiency . it has gotten high praise for home and abroad rotary rig user.
Now this type Kelly bar has been applied for patent, the patent No. is 201420542679.2.
钻杆规格：
|
序号 No. |
钻杆外径 OD |
节数 Section |
加压键形式 Way of crowding |
单节长度 Length of per section(m) |
参考深度 Drill depth |
额定扭矩 Torque |
|
|
1 |
¢299 |
3 |
4 |
全锁扣式(multi-lock) |
9-14 |
24-50 |
100-120 |
|
2 |
¢342 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 14 |
24 - 50 |
100 -120 |
|
3 |
¢355 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 14 |
24 – 50 |
100-120 |
|
4 |
¢368 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 14 |
24 – 50 |
150-180 |
|
5 |
¢377 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 14 |
24 – 50 |
150-180 |
|
6 |
¢394 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 15 |
24 – 55 |
180-200 |
|
7 |
¢406 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 15 |
24 – 55 |
180-200 |
|
8 |
¢419 |
3 |
4 |
全锁扣式(multi-lock) |
9 - 15 |
24 – 55 |
200-230 |
|
9 |
¢440（445） |
4 |
5 |
全锁扣式(multi-lock) |
9 - 15 |
24 – 55 |
220-260 |
|
10 |
¢470（482） |
4 |
5 |
全锁扣式(multi-lock) |
9 - 15 |
24 – 55 |
230-280 |
|
11 |
¢508 |
4 |
5 |
全锁扣式(multi-lock) |
9 - 16 |
30– 72 |
260-360 |
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Core barrel with roller bit
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