Roller Kelly Drive Bushing

  • 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