Power tongs control arrangement

Details Power tongs control arrangement Power tongs control arrangement

1979-04-04

1980-05-13

Krass, Errol A.

Tools

Wrench, screwdriver, or driver therefor

Machine

173164, 175 85, 364104, 81 5734, B25B 1350

Patent

active

042022258

ABSTRACT:
Apparatus for controlling a tongs arrangement which includes a tongs lift and lift speed arrangement, a backup tong and a power driven tong, is characterized by means for generating electrical signals to lift the backup tong and power tong at a predetermined speed to a predetermined elevation, means for generating an electrical signal to close and lock the backup tong when lifted, and means for generating an electrical signal to drive the power driven tong when the backup tong is closed and locked.

REFERENCES:
patent: 2988237 (1961-06-01), Devol, Jr.
patent: 3279624 (1966-10-01), Devol
patent: 3283918 (1966-11-01), Devol
patent: 3306471 (1967-02-01), Devol
patent: 3881375 (1975-05-01), Kelly
Ward et al., "A Computer-Controlled System for Automated Racking of Pipe on Drilling Vessels", Journal of Pet. Tech., Mar. 1976, pp. 253-258.

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