Apparatus for generating vibrational energy in a borehole

Details Apparatus for generating vibrational energy in a borehole Apparatus for generating vibrational energy in a borehole

1992-05-18

1993-05-11

Eldred, J. Woodrow

Acoustics

Geophysical or subsurface exploration

Well logging

181113, 181121, 73151, G01V 140

Patent

active

052103811

ABSTRACT:
An apparatus for generating vibrational energy in a borehole including an elongated mass having a surface of diameter less than the borehole, a rotary source for suspending the cylindrical mass in a borehole and a system to cause frictional contact between the surface of the mass and the borehole wall, the cylindrical mass being rotatable about its rotational axis in one direction to cause the mass to backward whirl in the opposite direction within the borehole, the cylindrical force of the whirling mass serving to generate vibrational energy in the borehole.

REFERENCES:
patent: 4954998 (1990-09-01), Rector

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