Roller Kelly Bushing is a necessary tool for drilling. It matches with master bushing to drive kelly pipe. when kelly pipe is drilling in. the rollers of the bushing favour the motion of kelly pipe and keep it concentric with well hole.
27- HDP type rolling kelly bushing is designed for the most rugged high torque. high speed drilling conditions. Its roller assembly provides an efficient driving mechanism that maintains good driving edges on the kelly and in condition of certain velocity. the drilling rod couldn"t bend.
27-HDP rolling bushing fits for 23”, 26”, 27 1/ 2”,37 1/2" and 49 1/ 2 rotary table Rolling bushing has four pins of 3 1/ 4” （83mm) diameter with central distance 25 3 / 4” （654mm). The pins match with3 1 / 2” - 6”square and hexagonal drilling rod.By changing the size of roller. the bushing can be used to kinds of kelly.
27- HDP type rolling kelly bushing technical data:
Applicable kelly size: 3”. 3 1/ 2”. 4 1/ 4”. 5 1/ 4”. 6”
Max. torque: 27110N.m
Overall dimensions: L*W*H=630*630*765
Weight: 730kg
Model available : HDS, 27-HDP, 20-HDP, 4KRVS, 20-MDP, 17-MDP, 4KRBM
