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Specifications
1. API SPEC 7K Standard2. Matches with the master bushing to drive the kelly
3. Square drive and pin drive two forms
Standard: API SPEC 7K Standard
Function:
This king of bushing is the necessary product of drilling rig. It matches with the master bushing to drive the kelly. This product rotates the kelly through four rollers to reduce the friction thus extend its working life.
Usage:
This product has square drive and pin drive two forms. It can match with different type of kelly by changing the rollers. Our rotary bushing can interchange with production of National, Oilwelll, Emsco, Ideco, Gardner etc company.
Detailed specification:
Technical specification and parameters for Roller bushing | ||||
Type |
Mode |
Type of drive |
Kelly size |
|
Square Kelly(in) |
Hex. Kelly (in) |
|||
HDS |
Heavy type |
Square |
3”~6” |
3”~6” |
21-HDP |
Pin |
3”~6” |
3”~6” |
|
20-HDP |
Pin |
3”~6” |
3”~6” |
|
RTM4 |
Medium type |
Square |
2 1/2”~5 1/4” |
3 “~4 1/4” |
20-MDP |
Pin |
2 1/2”~4 1/4” |
3 “~4 1/4” |
|
17-MDP |
Pin |
2 1/2”~4 1/4” |
3 “~4 1/4” |
|
RTS4 |
Light weight type |
Square |
2 1/2”~4 1/4” |
3 “~4 1/4” |
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