Velocity control arrangement for a computer-controlled oil drill

Details Velocity control arrangement for a computer-controlled oil drill Velocity control arrangement for a computer-controlled oil drill

1977-03-15

1978-12-05

Wise, Edward J.

Boots, shoes, and leggings

214 25, 340 18R, 340670, E21B 1900, G06F 1520

Patent

active

041288882

ABSTRACT:
A computer - controlled oil drilling rig is characterized by apparatus for comparing signals representative of the actual velocity and direction of travel of a traveling block with signals representative of predetermined minimum and maximum velocities of the traveling block and a signal representative of a predetermined direction of travel of the traveling block. Output signals are generated if the actual velocity signals are greater than the maximum velocity signal or less than the minimum velocity signal and if the direction of the traveling block deviates from the predetermined direction.

REFERENCES:
patent: 3660649 (1972-05-01), Gilchrist et al.
patent: 3752966 (1973-08-01), Foy, Jr. et al.
patent: 3761701 (1973-09-01), Wilder et al.
patent: 3881695 (1975-05-01), Joubert
patent: 3921152 (1975-11-01), Hagar et al.
patent: 4042123 (1977-08-01), Sheldon et al.

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