Roller Kelly Bushings
Roller Kelly Bushings can be classified as two types based on different ways of drive, square drive and pin drive. Also they can be classified as three types based on different styles, heavy,medium and light-duty. They are used for 17.1/2 to 49.1/2 inch rotary tables. They are designed and manufactured according to API Spec 7K Specification for drilling and well servicing equipment.
Main Technical Parameters:
|
Model
|
Type
|
Drive Way |
Applicable Size of Kelly(in) |
|
|
Square
|
Hex
|
|||
|
HDS
|
Heavy Duty |
Square Drive |
2.1/2-6
|
3-6
|
|
27-HDP
|
Pin Drive |
2.1/2-6
|
3-6
|
|
|
20-HDP
|
2.1/2-6
|
3-6
|
||
|
RTM4
|
Medium Duty |
Square Drive |
2.1/2-5.1/4
|
3-4.1/4
|
|
RTS4
|
Light Duty |
2.1/2-4.1/4
|
3-4.1/4
|
|