#2 Kelly and Top Drive Systems 

Very informative video thanks Bro

Hi, thank you for this informative video. Just out of curiosity, are you a mechanical or petroleum engineer by education?

Sir what is the difference between mouse hole and rate hole and their function in rig second question what is the difference between killy and top drive and function of top drive please

Goood video sir

What is the use of auto brake in top drive system Driller's console?

Where do you find these videos?