Method and system for controlling a well service rig based on load data
AssigneeKey Energy Services, Inc.
InventorFrederic M. Newman
Life of this patent
Estimating the term…
Abstract
The present invention is directed to methods for controlling the operations of a well service rig at a well site by evaluating load sensor data obtained from sensors on or associated with the well service rig. A rig load data chart can be reviewed and an average rig load can be determined for each pull of tubing or rods from a well. The average rig load can be used to calculate and set a rig overload level. If the rig load sensor reads a rig load at or above the rig overload level, the clutch for the hoist can be disengaged and the brake applied to prevent the load from either damaging the rig or breaking off the tubing or rods in the well. In addition, the rig load can be evaluated to determine when the limit the block speed when pulling rods or tubing.
Claims21
1-10. (canceled)
A method for limiting block speed while pulling pipe from a well comprising the steps of:
- receiving load data comprising the load of a pipe string being removed from a well;
- computing an average load based on the load data;
- determining if the average load is below a predetermined level;
- and
- limiting block speed below a predetermined speed based on a positive determination that the average load is below a predetermined level.
A method for preventing the pulling of a stand of pipe away from a pipe string while the stand of pipe is being disengaged from the pipe string, comprising the steps of:
- determining if a stand of pipe is being disengaged from a pipe string;
- receiving load data while disengaging the stand of pipe from the pipe string;
- determining if the load data is above a predetermined level;
- and
- automatically disengaging a clutch for a drive system raising the stand of pipe based on a positive determination that the load is above a predetermined level.
22-25. (canceled)
Dependencies are inferred from the claim text.