Automated control system for back-reaming

Details Automated control system for back-reaming Automated control system for back-reaming

2005-07-19

2005-07-19

Tsay, Frank (Department: 3672)

Boring or penetrating the earth

Automatic control

Of boring means including a below-ground drive prime mover

C175S040000

Reexamination Certificate

active

06918454

ABSTRACT:
A system that controls a back reaming operation of a drilling rig is provided that includes a hoisting system that moves a drill pipe during a back reaming operation at a hoisting speed and a hoisting torque. The hoisting system comprises at least one back reaming parameter sensor for measuring a corresponding at least one back reaming parameter. An operator control unit allows an operator to input a predetermined value of the at least one back reaming parameter therein. A back reaming parameter sensor obtains the measured value of the at least one back reaming parameter. A control system monitors the at least one back reaming parameter. A braking assembly resists the hoisting torque of the drawworks system when the measured value of the at least one back reaming parameter equals the predetermined value of the at least one back reaming parameter.

REFERENCES:
patent: 4809792 (1989-03-01), Lynch
patent: 5107940 (1992-04-01), Berry
patent: 6289997 (2001-09-01), Bischel et al.
patent: 6719069 (2004-04-01), Alft et al.
patent: 6766869 (2004-07-01), Brand et al.

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