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Roller Kerlly Bushings Roller Kerlly Bushings are used for 171/2-491/2 inch rotary tables. They are designed and manufactured according to API Spec 7K
model | Type | Way of drive | Suitable for kelly | |
Square(in) | Hex(in) | |||
HDS | Heavy | Square drive | 3-6 | 3-6 |
27HDP | Pin drive | 3-6 | 3-6 | |
20HDP | Pin drive | 3-6 | 3-6 | |
RTM4 | Medium | Square drive | 2 1/2-5 1/4 | 3-4 1/4" |
20-MDP | Pin drive | 2 1/2"-4 1/4" | 3-4 1/4" | |
17-MDP | 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" |
Roller kelly bushing