- The roller Kelly bushings designed to match with API master bushing for driving the Kelly
- Suitable for hex type Kelly and Square type Kelly
- The drive section designed in pin type and square shoulder, strictly match API rotary table
- The rollers specially heat-treated for extending Kelly’s service time, replaced easily
- Conforming to API Spec 7K
Product Specifications For Roller Kelly Drive Bushing
Model | Type | Drive Type | Fitting Kelly Size | |
Square (in) | Hexagonal (in) | |||
HDS | Heavy | Square | 2 1/2 - 6 | 3 - 6 |
27-HDP | Pin | 3 - 6 | ||
20-HDP | ||||
RTM4 | Medium | Square | 2 1/2 - 5 1/4 | 3 - 4 1/4 |
20-MDP | Pin | 2 1/2 - 4 1/4 | ||
17-MDP |