Top drive

E - Fixed Constructions – 21 – B

Patent

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Details

IPC codes

E21B 3/00 (2006.01) E21B 3/02 (2006.01) E21B 3/03 (2006.01)

Type

Patent

Patent number

CA 2563938

Description

A top drive for wellbore operations, the top drive comprising an alternating current permanent magnet motor (30) having a bore therethrough, a planetary gear apparatus (20) coupled to the alternating current permanent magnet motor (30), the planetary gear apparatus (20) having a bore therethrough, the bore through the alternating current permanent magnet motor (30) substantially aligned with the bore through the planetary gear apparatus (20) so that fluid is flowable therethrough, the top drive further comprising a quill (50) drivingly connected to the planetary gear apparatus to rotate the quill.

L'invention concerne un entraînement supérieur destiné à des opérations de forage, cet entraînement comprenant un moteur à aimants permanents à courant alternatif (30) dans lequel est ménagé un alésage, un appareil d'engrenage planétaire (20) couplé au moteur (30), cet appareil (20) comportant un alésage, l'alésage ménagé dans le moteur (30) étant sensiblement aligné avec l'alésage ménagé à travers l'appareil d'engrenage planétaire (20) de sorte que le fluide puisse s'y écouler. L'entraînement supérieur comprend en outre un arbre creux (50) relié par entraînement à l'appareil d'engrenage planétaire afin de mettre en rotation l'arbre creux.

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