Patent ID: 6926103

Claim:
A hoist system comprising a. a derrick comprising i. a derrick inside; ii. a derrick outside; and iii. a derrick top side; b. a splittable block connected to the derrick top side; wherein the splittable block comprises a plurality of moveable loose pulleys secured to either the movable trolley or the derrick and a plurality of fixed pulleys secured to the derrick; c. a hoisting cable guided through the splittable block; d. a moveable trolley comprising a trolley top side and a trolley bottom side, wherein the trolley is connected to the splittable block and wherein the moveable trolley is removably secured on the derrick; and e. a hoist winch adapted to pull the hoisting cable over the derrick top side and through the splittable block to move the moveable trolley relative to the derrick.