A drill rig and a method for controlling a fan therein

F - Mech Eng,Light,Heat,Weapons – 01 – P

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F01P 7/02 (2006.01) E21B 7/00 (2006.01)

Patent

CA 2575711

The invention relates to a method for controlling at least one fan (13) for the regulation of the cooling demand of at least two cooling elements (12) comprised in a drill rig (1) , the cooling demand of each one of the cooling elements (12) being determined, that the determined cooling demands are weighted together and that the fan (13) is controlled based on said weighting together. The invention is characterized in that at least one cooling element is equipped with a safety thermostat, which, if required, prevents undercooling by the fact that the fluid in question is not allowed to circulate in this cooling element. Furthermore, the invention also relates to a drill rig for the execution of the above-mentioned method.

L'invention concerne un procédé de commande d'au moins un ventilateur (13) permettant de réguler la demande de refroidissement d'au moins deux éléments refroidissants (12) compris dans un appareil de forage (1), la demande de refroidissement de chacun des éléments refroidissants (12) étant déterminée. Les demandes de refroidissement ainsi déterminées sont pondérées et, puis, le ventilateur (13) est commandé en fonction de ladite pondération. Le procédé de cette invention est caractérisé en ce qu'au moins un élément refroidissant est équipé d'un thermostat de sécurité qui, si cela est requis, empêche une surfusion, du fait que le fluide en question ne peut pas circuler dans l'élément refroidissant. En outre, cette invention a pour objet un appareil de forage destiné à l'exécution du procédé susmentionné.

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