This paper presents a control system design methodology for the drill-string rotary drive and draw-works hoist system aimed at mature drilling rig retrofitting. The rotary drive is equipped with an active damping speed control system featuring a proportional-integral speed controller readily available within modern controlled electrical drives. extended with drill-string back-spinning... https://www.bekindtopets.com/deal-find-Equi-Jec-6-best-super/