Roller Kelly Bushing

Description

Roller Kelly bushing is a necessary tool for drilling, by matching with Rotary Square to drive Kelly pipe. Through the rotation of four rolls, the friction between rolls and Kelly pipes is reduced to extend service life. Change different rollers to match with different squares and hexagonal Kelly pipes and connect with different rotary tables. Two transmission styles (square and pin connected) are available.
The product is designed and manufactured according to API Spec 7K “Specification for Drill Equipment”.

Parameter

Model	Type	Max. torque (N.m)	Drive Mode	Size Range of Kelly (in)
Model	Type	Max. torque (N.m)	Drive Mode	Square	Hexagon
HDS	Heavy	27000	Square	3～6	3～6
20-HDP		32340	Pin	3～6	3～6
27-HDP		32340	Pin	3～6	3～6
MDS	Medium	22540	Square	2 1/2～5 1/4	3～4 1/4
4KRVS			Pin	2 1/2～4 1/4	3～4 1/4
17-MDP			Pin	2 1/2～4 1/4	3～4 1/4
20-MDP			Pin	2 1/2～4 1/4	3～4 1/4
4KRBM	Light	13720	Square	2 1/2～4 1/4	3～4 1/4