Safemode operating system for a drilling or service rig
AssigneeKey Energy Services, Inc.
InventorFrederic M. Newman
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a system designed to manage or slow the block travel speed down to safe speeds when the rig is operating in a light load/high speed condition. The system monitors and controls engine torque and horsepower, providing the minimum amount of each necessary to pull the light load out of the hold without providing sufficient excess torque to pull the load through a snag.
Claims18
A method for preventing a light load catastrophic event on an oil rig comprising:
- specifying a minimum hook load weight,
- monitoring the hook load weight,
- limiting the engine horsepower supplied to power the oil rig hoist to only the needed amount of torque necessary to pull tubulars from a well once the hook load weight falls below the specified minimum hook load weight.
A method for preventing a light load catastrophic event on an oil rig comprising:
- specifying a minimum hook load weight,
- monitoring the hook load weight,
- reducing the pressure applied to the drum clutch bladder once the hook load weight falls below the specified minimum hook load weight.
A method for preventing a light load catastrophic event on an oil rig comprising:
- specifying a minimum hook load weight,
- monitoring the hook load weight,
- introducing slippage into the oil rig torque converter once the hook load weight falls below the specified minimum hook load weight.
A method for preventing a light load catastrophic event on an oil rig comprising:
- specifying a minimum hook load weight,
- monitoring the hook load weight,
- limiting the engine horsepower supplied to power the oil rig hoist to only the needed amount of torque necessary to pull tubulars from a well once the hook load weight falls below the specified minimum hook load weight,
- reducing the pressure applied to the drum clutch bladder once the hook load weight falls below the specified minimum hook load weight, and
- introducing slippage into the oil rig torque converter once the hook load weight falls below the specified minimum hook load weight.
Dependencies are inferred from the claim text.