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IMT Full Interlock 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 &

Name:IMT Full Interlock Kelly Bar
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IMT Full Interlock 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.

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