Device for controlling a brake of a winch drum mounted on a drilling rig and method for controlling such a device
AssigneeAutelec
InventorBernard M Imbault
Life of this patent
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Abstract
A device for controlling a brake of a drum of a draw-works equipping a drilling rig operating a drill tool in a borehole, which device comprises a brake lever having a first end connected mechanically to brake bands designed to act on the drum and a second end provided with a first brake control handle. The device further comprises actuation means configured to be controlled and arranged to act mechanically on the brake lever, and a second brake control handle arranged to servo-control said actuation means.
Claims14
A device for controlling a brake of a drum of a draw-works equipping a drilling rig operating a drill tool in a borehole, the device comprising:
- a brake lever having a first end connected mechanically to brake bands designed to act on said drum and a second end provided with a first brake control handle, said device further comprising actuation means configured to be controlled and arranged to act mechanically on said brake lever, and a second brake control handle arranged to servo-control said actuation means and electronic means configured to control the actuation means, on the basis of a control signal emitted by the second brake control handle and/or of information on weight conditions to which the drill tool is subjected;
- wherein the second brake control handle incorporates an extensometer sensor arranged to generate a handle control signal sensitive to the pressure exerted on said second brake control handle by the hand of an operator.
A method of controlling a brake control for controlling a brake of a drum of a draw-works equipping a drilling rig operating a drill tool in a borehole, which method implements a brake control, said brake control comprising a brake lever having a first end connected mechanically to brake bands designed to act on said drum and a second end provided with a first brake control handle, said method comprising:
- applying a mechanical force to said brake lever, said applied force being controlled to procure servo-control of the position of said brake lever and/or of a thrust force exerted on said brake lever;
- controlling actuation means, on the basis of a control signal emitted by a second brake control handle and/or of information on weight conditions to which the drill tool is subjected;
- wherein the second brake control handle incorporates an extensometer sensor;
- and
- generating a handle control signal sensitive to the pressure exerted on said second brake control handle by the hand of an operator.
Dependencies are inferred from the claim text.