Computer-controlled oil drilling rig having drawworks motor and

Details Computer-controlled oil drilling rig having drawworks motor and Computer-controlled oil drilling rig having drawworks motor and

1977-03-15

1980-02-05

Krass, Errol A.

Boots, shoes, and leggings

173 2, 175 52, 175 85, 364118, E21B 1900, G06F 1520

Patent

active

041875460

ABSTRACT:
An oil drilling rig includes a racker, a power tongs, a drawworks having a motor and a brake, and a general purpose programmable digital computer associated with each to sequentially initiate the operation thereof. Closed-loop control systems for the drawworks motor and drawworks brake are included to provide control signals to a motor drive and to a brake actuator.

REFERENCES:
patent: 3283918 (1966-11-01), Devol
patent: 3552506 (1971-01-01), Mayer
patent: 3680412 (1972-08-01), Mayer et al.
patent: 4037672 (1977-07-01), Hodge
Ward et al.; "A Computer-Controlled System for Automated Racking of Pipe on Drilling Vessels"; Journal of Petroleum Tech., Mar. 1976, pp. 253-258.

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