Description

Kelly Bars are key components in the execution of boreholes by hydraulic rotary drilling rigs. Telescopic Kelly bars transfer torque and crowd force from the rotary drive to the drilling tool. SHENWEI is a highly specialized manufacturer of telescopic kelly bars to be applied to any type of piling rig available in the market. Kelly bars are featuring specific construction details:

·         2 - 6 fold telescopic construction for a depth range from *5 - **0 m
 
·         The tubular kelly sections are manufactured from high-tensile steel to ensure minimum weight at adequate strength
 
·         Torque transfer capacity **0 - **0 kNm
 
·         Interlocking type
 
·         Friction type
 
·         Locks and wear-resistant drive rails (accordingly with rotary sleeve)
 
·         Robust Terminal joints, that are the terminal part of each telescopic pipe, provided to transfer torque and crowd force to the kelly bar
 
·         Bottom shock absorbers (spiral or discs type)
 
·         Standardized square kelly drive stub for connecting all types of drilling tools