Boring or penetrating the earth – Automatic control
Patent
1994-10-25
1995-11-14
Novosad, Stephen J.
Boring or penetrating the earth
Automatic control
175 27, 175 40, 73151, 364422, E21B 4400
Patent
active
054657989
ABSTRACT:
A rotary blasthole drilling apparatus comprises a rotary blasthole drill and a drill automation control system. The apparatus includes a pull-down motor and a drill motor. The pull-down motor is driven by a pump to provide a pull-down force to a drill string, and the drill motor is used to provide rotary force to rotate a drill bit of the drill string. The drill automation control system includes a number of functional components including a user interface. Through the user interface, an operator sets a rotary torque set point that determines an amount of torque applied to the drill bit by the drill motor. The control system further includes a detector, for detecting pressure in the pump during a drilling operation, and a processor, which is operative under the control of a program stored therein and responsive to the rotary torque set point and signals from the pull-down pressure sensor for generating an error signal. The error signal is applied to a proportional control valve for modulating the pull-down pressure to provide a substantially constant torque to the system. The rotary torque set point may be varied as a function of one or more of the following external factors: excessive mast vibration, bit air pressure or bit plunge.
REFERENCES:
patent: 3675727 (1972-07-01), Clark
patent: 4606415 (1986-08-01), Gray et al.
patent: 4760735 (1988-08-01), Sheppard et al.
patent: 5237540 (1993-08-01), Malone
patent: 5249161 (1993-09-01), Jones et al.
Kennedy, "Computer Drilling System can provide optimization rig control", The Oil & Gas Journal, May 10, 1971, 4 pages.
Edlund Hans E.
Haines Marvin L.
Judson David H.
Novosad Stephen J.
Reedrill Inc.
LandOfFree
Drill automation control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill automation control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill automation control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1215244