Pin Drive Model:27-PDHD/20-PDHD
Square Drive Model:SDHD
Roller Kelly Bushing
Kelly Bushing are as per API-7K specification for pin drive & square drive master bushing for Rotary Table sizes
from 20-½" to 49-½". Kelly Bushing is used for heavy duty drilling operations in high torque
conditions at off-shore as well at on-shore drilling operations to handle Square or Hexagonal Kelly sizes from 3" to 6" .
Kelly Bushing suitable for 17-½" Pin Drive & Square Drive Master Bushing is also available.