Specifications

Roller Kelly Bushings:
1.styles:square and pin
2.API Spec.7K

Roller Kelly Bushings

 

     

 

 The Pin Drive Roller Kelly Bushing provides the following advantages:

 

   1.Pulling out or feeding off string can be done while rotating;

   2.Because of its integral construction, it cannot fly out and hurts you;

   3.The bushing is easily installed into the master bushing, maintaining good alignment;

The contact between Kelly and roller is rolling contact, so friction is lower, and weight on bit is accurate.

 

Kelly Size mm(inch)	Rotary Table mm(inch)	Drive Hole Dia mm(inch)	Center Distance of the Drive Hole mm(inch)
133.4(5-1/4")	952.5(37-1/2")	86.2(3-25/64")	654(25-3/4")