PILING RIGS KELLY BARS

Kelly bars are key components in the execution of boreholes with hydraulic rotary drilling rigs. They transfer the torque of the rotary drive and the crowd pressure of the crowd system concurrently to the drilling tool. A Kelly bar consists of 3 – 6 telescopic tubular sections with a system of drive keys and lock recesses, welded onto their outer surfaces. Standard Kelly bars are fabricated with 3 drive keys or 6 drive keys on each section. The tubular Kelly sections are manufactured from high-tensile steel to ensure minimum weight at adequate strength. Unikelly is a highly skilled manufacturer of Kelly Bars that are tailor-made to most of hydraulic rotary drill rigs in the market. Unikelly’s Kelly Bar features a construction depth can reach 140m.