Drilling optimization searching and control apparatus

Details Drilling optimization searching and control apparatus Drilling optimization searching and control apparatus

1978-06-29

1979-08-28

Pate, III, William

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

175 24, 173 6, 173 8, 173 9, 364420, E21C 102, E21C 110

Patent

active

041657896

ABSTRACT:
An apparatus employed in the searching of the optimized rate of penetration of a drill into a given medium based upon the two drilling parameters of thrust and speed of revolution. Preset base values of both parameters are input into the drilling control mechanism at the start of drilling. Thereafter, based upon readings from an automatic penetration rate calculator, the apparatus effects automatic incremental changes to one of the parameters, the other being held constant, until a maximized rate of penetration is established. Subsequently, the other parameter, previously held constant, is changed until a new maximized penetration rate is found. This optimized penetration rate searching is continuously and automatically effected until the drilling process is completed. The apparatus additionally provides for the allowance of a wait period between successive incremental changes for accommodating response times of the system as well as instabilities which may occur as the result of nonlinear process dynamics.

REFERENCES:
patent: 3520375 (1970-07-01), Raynal et al.
patent: 3593807 (1971-07-01), Klima
patent: 3613805 (1971-10-01), Lindsted
patent: 3658138 (1972-04-01), Gosselin
patent: 3872932 (1975-03-01), Gosselin
patent: 3971449 (1976-07-01), Nylund
patent: 4079795 (1978-03-01), Sackman

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