Stabilizer for drill strings

Details Stabilizer for drill strings Stabilizer for drill strings

2011-06-07

2011-06-07

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C175S323000, C175S325500

Reexamination Certificate

active

07954566

ABSTRACT:
Apparatus and methods for using the drilling apparatus to increase the linear direction of the drilling action are described. The drilling apparatus contains a drill rod that is fitted with a reinforcing sleeve that is located on the drill rod as close as possible to the drill bit. The outer diameter of the sleeve is configured to be substantially the same as the bit diameter and, if necessary, just slightly smaller than the bit diameter. The sleeve reinforces the drill rod next to the drill bit and reduces and substantially eliminates the gap between the drill rod and the borehole in the vicinity of the drill bit. The sleeve, therefore, reduces the wobble of the drill bit in the borehole and reduces the drill bit from wavering from a straight linear drilling direction. The reinforcing sleeve can contain helical channels for moving material displaced by the drilling process away from the drill bit.

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AU 200726627, Apr. 20, 2010, Office Action.
AU 2007262627, Mail Date Sep. 3, 2010, Office Action.

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