Top drive systems

Details Top drive systems Top drive systems

2008-07-22

2008-07-22

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

C166S077510, C175S085000

Reexamination Certificate

active

07401664

ABSTRACT:
A top drive system for wellbore operations, the top drive system including motor apparatus, a main shaft driven by the motor apparatus, the main shaft having a top end and a bottom end, a quill connected to the main shaft, and a gear system interconnected with the quill and the motor apparatus.

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