Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Reexamination Certificate
2008-11-17
2010-10-12
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Tool actuation by reaction of rotating eccentric mass
C175S061000, C175S074000
Reexamination Certificate
active
07810582
ABSTRACT:
An electrical generating system is used for a horizontal directional drilling system. The drilling system has a generally horizontal drill stem that rotates. A generator has first and second components. The first component rotates with the drill stem, while the second component is able to rotate with respect to the first component. An eccentric mass is rotatably mounted inside of the drill stem and is coupled to the second component, wherein as the drill stem rotates, relative rotational motion is produced between the first and second components and the generator produces electrical power. The eccentric mass is mounted on two spaced apart mounting points inside of the drill stem. The generator provides power to a sonde. The generator is in a housing which has flow channels that allow drilling fluid to flow through the drill stem.
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Mantooth Geoffrey A.
Neuder William P
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