Rotary Drilling Rig Kelly Bar
Kelly bars are a key component on 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. Our kelly bars consist of 3-6 telescopic tubular sections with a system of drive keys and lock recesses that have been welded onto the outer surfaces. Standard kelly bars are produced with a total of 6 drive keys on each section. The tubular kelly sections are manufactured from high tensile steel to ensure the minimum weight has the right strength for different applications.
Drilling Rig Interlocking Kelly Bar
Suny is a well-known drilling rig kelly bar manufacturer in China. We produce up to 50% of China’s drilling rig kelly bars, and supply them to numerous companies, including SANY XCMG, CSR, ZOOMLION and other brand names..
Details of kelly bar
Telescopic pipes steel quality: Q345B
Drive rails steel quality: German imported steel plate
Drive stub steel quality: Special forged steel
Drive stub dimensions: 200x200, 150x150 or customized
Outer pipe available diameter: 254, 292, 298, 305, 343, 368, 378, 445…
Upper shock absorber: Damping rubber ring
Lower shock absorber system: Damping rubber ring and damping spring
Telescopic elements Number: 3, 4, 5, 6 others on request