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US 6,926,259 B1Granted
Hoist system
AssigneeItrec B.V.
InventorsJoop Roodenburg, Adriaan Jan Rodenburg
Life of this patent
Estimating the term…
Abstract
The invention is a hoist system for use on a drilling rig made of a tubular mast with a front, back, and top side, a splittable block connected to the mast top side, a trolley with a trolley top and bottom side, wherein the trolley's top side is connected to the splittable block and wherein the trolley is removably secured on the mast's front side, a gripper connected to the trolley bottom side for gripping a load, a hoist cable passing through the splittable block and connected on one end to a hoist cable winch, and a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift the load.
Claims66
A hoist system for use on a drilling rig, comprising
- a. a tubular mast comprising:
- i. a mast front side;
- ii. a mast back side;
- and
- iii. a mast top side;
- b. a splittable block connected to the mast top side;
- c. a trolley comprising a trolley top side and a trolley bottom side, wherein the trolley top side is connected to the splittable block and wherein the trolley is removably secured on the mast front side;
- d. a gripper connected to the trolley bottom side for gripping a load;
- e. a hoist cable passing through the splittable block and connected on one end to a hoist cable winch;
- and
- f. a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift a load.
8 more elements
A hoist system for use in casing drilling comprising:
- a. a tubular mast comprising:
- i. a mast top side with a mast opening disposed therein;
- ii. a mast back side;
- and
- iii. a mast front side;
- b. a splittable block connected to the mast top side, having a splittable block opening aligned with the mast opening;
- c. a trolley comprising a trolley top side and a trolley bottom side, wherein the trolley top side is connected to the splittable block having a trolley opening disposed in the trolley from the trolley top side through to the trolley bottom side and aligned with the splittable block opening;
- d. a gripper connected to the trolley bottom side for gripping a load;
- e. a hoist cable passing through the splittable block and connected on one end to a hoist cable winch;
- f. a wire line passing through the mast opening, the splittable block opening, and the trolley opening and connected on a first end to a wire winch;
- g. the hoist cable winch is adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift a load;
- and
- h. the wire winch is adapted to pull the wire line over the mast top side and through the openings for lifting casing drilling equipment.
10 more elements
A method for quickly modifying a hoist system from heavy load lifting to light load lifting comprising the steps:
- a. using a hoist system comprising:
- i. a tubular mast comprising:
- 1. a mast front side;
- 2. a mast back side;
- and
- 3. a mast top side;
- ii. a splittable block connected to the mast top side;
- iii. a trolley comprising a trolley top side and a trolley bottom side, wherein the trolley top side is connected to the splittable block and wherein the trolley is removably secured on the mast front side;
- iv. a gripper connected to the trolley bottom side for gripping a load;
- v. a hoist cable passing through the splittable block and connected on one end to a hoist cable winch;
- and
- vi. a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift a load;
- b. disconnecting the heavy load from the gripper;
- c. hoisting the trolley to a first position on the mast above a uppermost lifting position;
- d. disengaging a portion of loose pulleys from the trolley;
- e. picking up a lighter load;
- and
- f. resuming the hoist system operation.
15 more elements
A method to slip the hoist cable of the hoist system comprising the steps of:
- a. using a hoist system comprising:
- i. a tubular mast comprising:
- 1. a mast front side;
- 2. a mast back side;
- and
- 3. a mast top side;
- ii. a splittable block connected to the mast top side;
- iii. a trolley comprising a trolley top side and a trolley bottom side, wherein the trolley top side is connected to the splittable block, wherein the trolley is removably secured on the mast front side;
- iv. a gripper connected to the trolley bottom side for gripping a load;
- v. a hoist cable passing through the splittable block and connected on one end to a hoist cable winch;
- and
- vi. a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift a load;
- b. stopping the hoist system lifting operations;
- c. paying out the hoist cable with the winch;
- d. winding the hoist cable with a second winch;
- thereby transferring the hoist cable from the winch to the second winch;
- and
- e. restarting hoist system lifting operations.
15 more elements
A method for quickly modifying a hoist system from light load lifting to heavy load lifting comprising the steps:
- a. using a hoist system comprising:
- i. a tubular mast comprising:
- 1. a mast front side;
- 2. a mast back side;
- and
- 3. a mast top side;
- ii. a splittable block connected to the mast top side;
- iii. a trolley comprising a trolley top side and a trolley bottom side, wherein the trolley top side is connected to the splittable block and wherein the trolley is removably secured on the mast front side;
- iv. a gripper connected to the trolley bottom side for gripping a load;
- v. a hoist cable passing through the splittable block and connected on one end to a hoist cable winch;
- and
- vi. a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift a load;
- b. disconnecting a light load from the gripper;
- c. hoisting the trolley to a first position on the mast above a uppermost lifting position;
- d. engaging a portion of loose pulleys with the trolley;
- e. picking up a heavier load, and
- f. resuming the hoist system operation.
14 more elements
Dependencies are inferred from the claim text.