Top drive drilling system and other applications using a low...

Boring or penetrating the earth – With means to feed drive

Reexamination Certificate

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C175S195000

Reexamination Certificate

active

08047306

ABSTRACT:
A low speed alternating current motor having motor shaft speeds of about 300 is provided, and such motor has application in numerous industries and devices, such as, for example, in top drive drilling systems. Because of the low shaft speed, mechanical speed reduction equipment may not be necessary. In addition, the motor shaft may be hollow to facilitate the flow of fluid, such as, for example, drilling mud.

REFERENCES:
patent: 3612971 (1971-10-01), Blaschke
patent: 4116592 (1978-09-01), Cherny et al.
patent: 5235259 (1993-08-01), Dhindsa et al.
patent: 5751078 (1998-05-01), Loewenthal
patent: 6153959 (2000-11-01), Lorenzo
patent: 6575230 (2003-06-01), Kadota et al.
patent: 6798104 (2004-09-01), Kajiura et al.
patent: 7140443 (2006-11-01), Beierbach et al.
patent: 7500531 (2009-03-01), Williams et al.
patent: 2004/0069497 (2004-04-01), Jones et al.
patent: 2005/0200232 (2005-09-01), Laing
patent: 2005/0269889 (2005-12-01), Tessier et al.
patent: 2007/0175662 (2007-08-01), Kracik
patent: 2007/0215342 (2007-09-01), Fincher et al.
patent: 0600270 (1994-06-01), None
Will L. McNair, SCR and New Technology in Electric Rig Drilling: A Safety and Efficiency Handbook, 1991, pp. 179-183, PennWell Publishing Co., Tulsa, Oklahoma, USA.
Canadian Office Action, Dec. 4, 2009.

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