Teleskopic Kelly bars transfer torque and crowd force from the rotary drive to the drilling tool.

Bauer Kelly bars are featuring specific construction details:

• 2 - 5 fold telescopic construction for a depth range
  from 15 - 100 m
• torque transfer capacity 120 - 480 kNm
• interlocking type (as standard for BG rigs)
• friction kelly (mainly for crane attachment rigs)
• 6 cams and large wear-resistant guides
• spring-type shock absorbers
• standardised square kelly drive stub for connecting all types of drilling tools 
• noise-damping system (optional)