A drawworks gearbox includes additional braking on the input side of the gearbox to provide a redundant emergency brake and, optionally, a separate parking brake with the drumside brakes being the emergency brake. An air-cooled brake disc is attached to a high speed coupling connected to the gearbox input pinion. A hydraulic-apply, spring-release brake is mounted to the gearbox housing at each pinion location and arranged to act on its respective disc.


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    Title :

    DRAWWORKS GEARBOX WITH REDUNDANT BRAKING ON INPUT SIDE


    Additional title:

    BOITE D'ENGRENAGES DE TREUIL DE FORAGE A FREINAGE REDONDANT SUR LE COTE ENTREE


    Contributors:

    Publication date :

    2018-04-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren



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