What is a kelly bar? A Kelly bar is a specialized component used in the construction and drilling industry, primarily in the drilling of deep foundation piles or boreholes. It is an essential part of various types of drilling rigs, such as rotary drilling rigs, to facilitate the drilling process in challenging ground conditions.

Understanding a Kelly Bar. A Kelly bar is a long, telescopic tubular structure attached to a drilling rig's rotary table. It transfers drilling torque from the rig's power unit to the drilling tool.

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.

Kelly bars (also called grief joints, kelly joints and kelly stems) are used during the execution of boreholes by hydraulic rotary drilling rigs. The bars themselves are hollow and attach to the top of the drill column.

Dec 31, 2024 · What is a Kelly bar used for? Kelly bar is used in rotary drill processes to transmit torque during drilling. How does a Kelly bar work? Kelly bar rotates and lifts the tools for drilling to penetrate the ground and extract rocks and soil. What are the different types of Kelly bars?

Unidrill interlocking and friction kelly bars value the quality, material, constructionetc.. Suitable for bauer, soilmec, mait, liebherr etc. piling rig.

Mar 31, 2022 · A Kelly bar is made up of two to five telescopic tubular pieces that are welded together with drive keys and lock recesses on their exterior surfaces. A Kelly bar is a hydraulic or manual device used to turn the drill bit on a drill rig.

crowd system concurrently to the drilling tool. A Kelly bar consists of 2 – 5 telescopic tubular sections with a system of drive keys and lock recesses, welded onto their outer surfaces. Standard Kelly bars are fabricated with a total of 6 drive keys on each section. The tubular Kelly sections are manufactured from high-tensile steel to ensure

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.

Unicorn friction kelly bars consists of 2 to 5 telescopic tubular sections with a system of drive keys and lock recesses welded onto their outer surfaces. Standard Kelly Bars are fabricated with a total of 6 drive keys on each section.