The large-scale stationary production facilities allowing for driller maintenance and operation and convergence as well as the production process of oil extraction work well, and also facilitate the establishment of a compact and complete production flow process, centralized management, and high efficiency...
When the floating crown block goes down to the lowest point, the driller looses the wire rope on the hoisting barrel to make the floating crown go up to the highest point, for continued automatic delivery. iv. Accident prevention When the hook load decreases suddenly or the main cylinder ...