Top drive systems

Details Top drive systems Top drive systems

2007-03-13

2007-03-13

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With above-ground means to feed tool

C175S220000, C166S078100

Reexamination Certificate

active

10862787

ABSTRACT:
A top drive system for wellbore operations including a hollow bore alternating current permanent magnet motor with a motor bore therethrough, a planetary gear system coupled to the motor, the gear system having a gear system bore therethrough, a quill drivingly connected to the planetary gear system and rotatable thereby to rotate a tubular member located below the quill, the motor adjacent the gear system, the motor bore aligned with the gear system bore so that fluid is flowable through the top drive system from the top of the motor to the bottom of the planetary gear system and into and through the quill.

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