Gerotor and bearing system for whirling mass orbital vibrator

Details Gerotor and bearing system for whirling mass orbital vibrator Gerotor and bearing system for whirling mass orbital vibrator

2007-02-27

2007-02-27

Donovan, Lincoln (Department: 2837)

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

C181S113000, C181S108000, C181S112000, C181S106000, C166S249000, C166S104000, C166S177600

Reexamination Certificate

active

10697398

ABSTRACT:
A gerotor and bearing apparatus for a whirling mass orbital vibrator which generates vibration in a borehole. The apparatus includes a gerotor with an inner gear rotated by a shaft having one less lobe than an outer gear. A whirling mass is attached to the shaft. At least one bearing is attached to the shaft so that the bearing engages at least one sleeve. A mechanism is provided to rotate the inner gear, the mass and the bearing in a selected rotational direction in order to cause the mass, the inner gear, and the bearing to backwards whirl in an opposite rotational direction. The backwards whirling mass creates seismic vibrations.

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