drawworks การใช้

• Horsepower ratings for drawworks can also have a wide range, often ranging from 1000 HP to over 3000 HP.
• Drawworks can be used to hoist or lower several hundred thousand pounds of weight and can come in AC, DC or mechanical power units.
• The drawworks often has a pulley drive arrangement on the front side to provide turning power to the rotary table, although on many rigs the rotary table is independently powered.