Top drive

Details Top drive Top drive

E - Fixed Constructions

21

B

E21B 3/02 (2006.01) E21B 19/06 (2006.01)

Patent

CA 2634533

A top drive comprising a drive motor and includes a gear apparatus with a sun gear, the gear apparatus located beneath the drive motor, the apparatus further comprising a seal apparatus for selectively engaging the sun gear to seal off a pathway from the gear apparatus to the drive motor.

L'invention porte sur un entraînement supérieur comprenant un appareil d'engrenage à planétaire situé sous le moteur d'entraînement; cet appareil comprend en outre un appareil d'étanchéisation conçu pour engager sélectivement le planétaire de façon à sceller une voie de passage entre l'appareil d'engrenage et le moteur d'entraînement.

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