| After-sales Service: | Replacement |
|---|---|
| Warranty: | 18 Months |
| Certification: | CE, RoHS, ISO 9001:2008, API 7K Certificate |
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Roller kelly bushing can be classified as two types based on different ways of driving type- 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"rotary tables. They are designed and manufactured according to API 7K Specification for drilling and well serving equipment.
| ROLLER KELLY BUSHING |
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| Model | Type | Way of Drive | Kelly Size | |
| Square | Hex. | |||
| HDS | Heavy | Square Drive | 3-6 | 3-6 |
| 27-HDP | Heavy | Pin Drive | 3-6 | 3-6 |
| 20-HDP | Heavy | Pin Drive | 3-6 | 3-6 |
| RTM4 | Medium | Square Drive | 2.1/2-5.1/4 | 3-4.1/4 |
| 20-MDP | Medium | Pin Drive | 2.1/2-4.1/4 | 3-4.1/4 |
| 17-MDP | Medium | Pin Drive | 2.1/2-4.1/4 | 3-4.1/4 |
| RTS4 | Light Duty | Square Drive | 2.1/2-4.1/4 | 3-4.1/4 |
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