Braking system for cable spooling drums

Details Braking system for cable spooling drums Braking system for cable spooling drums

1977-12-05

1979-09-25

Reger, Duane A.

Brakes

Position adjusters

Equalizers

188 77R, F16D 6532

Patent

active

041687680

ABSTRACT:
A hydraulic back-up system for use in combination with an equalizer beam of a drawworks brake system during the drilling of an oil and/or gas well bore for reducing the hazards in the event of failure of the drawworks braking system by automatically locking the equalizer beam in order that a single brake band of a two-brake band system will function for holding the load in an emergency situation.

REFERENCES:
patent: 1711886 (1929-05-01), Ginter
patent: 1932685 (1933-10-01), Black
patent: 2282615 (1942-05-01), Spalding
patent: 2465164 (1949-03-01), Maier et al.
patent: 2489449 (1949-11-01), Crookston
patent: 2569479 (1951-10-01), Lonngren
patent: 2928505 (1960-03-01), Wilson

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