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Casagrande Rotary Drilling Rig Kelly Bar

We provide drilling rig kelly bars in the following rig models: B300, B360, B400, B400HT,  and B850HT.

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\Users can choose Kelly drive stubs at 130*130, 150*150, 200*200. Others can be customized.

 

Rigs Model

Kelly Bay

Domination

Number of Tube

Outer Pipe Length (m)

Drilling Depth

(m)

Transportation Length (m)

Total Weight

(ton)

TR250D

Friction

6

14.5

79

16

16

TR360D

Friction

6

17.6

97

19

15

Interlocking

4

17.6

64

19

15

TR400DH

Friction

6

19.3

108

20.8

22

Interlocking

4

19.3

71

20.8

22

TR500C

Friction

6

23.5

130

25

25

Damping systems: We use a damping spring and rubber ring to reduce from each element impacted.

Kelly Bar Classification and Structure

Locking kelly bar systems are designed for drilling hard materials, as well as when a crowd force application is needed. They come with drive rails designed with locking pockets on there length and the corresponding terminal joint locking guides.

 

The purpose is to interlock each telescopic element to an inner following element in order to apply maximum torque and crowd force developed by the base rig. Due to this, the rotary tables inner drive is equipped with locking pockets.

 

When extracting the locking bar from the hole, a combination of lifting and rotating counterclockwise allows the telescopic element to unlock.

 

Locking bars typically come with 3, 4 and 5 telescopic element to unlock.

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Drive rail steel quality: German imported steel palate

Drive stub steel quality: Special forged steel

Drive stub dimensions: 200*200, 150*150 or customized.

Outer pipe available diameter: 254, 292, 298, 305, 343, 368, 378, 445.

Upper shock absorbed systemDamping rubber ring

Lower shock absorbed system: Damping rubber ring and damping spring.

Number of telescopic elements: 3, 4, 5, 6, other on request.

 

Friction Kelly bars transfer the torque to the drilling hole.  

The telescopic elements are advanced using a friction contact from each of the friction drive rails that run down the outside of each kelly bar.These drive rails are driven by rotary table and terminal joints of each successively larger diameter kelly bar. The terminal joint is a long piece on the inside and bottom of each kelly bars.

 

Frictional kelly bars typically are available with 3, 4, 5 or 6 telescopic elements. They are primarily used for deep piles in the medium hard soil conditions.

 

Drive rail steel quality: German imported steel palate

Drive stub steel quality: Special forged steel

Drive stub dimensions: 200*200, 150*150 or customized.

Outer pipe available diameter: 254, 292, 298, 305, 343, 368, 378, 445.

Upper shock absorbed systemDamping rubber ring

Lower shock absorbed system: Damping rubber ring and damping spring.

Number of telescopic elements: 3, 4, 5, 6, other on request.

Copyright: Xuzhou Hengxing Jinqiao Machinery Technology Co., Ltd  Technical Support Administrator