Methods of employing vibrational energy in a borehole

Details Methods of employing vibrational energy in a borehole Methods of employing vibrational energy in a borehole

1992-10-26

1994-05-03

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-refraction type

367 37, 367 57, 181106, 181113, 181121, G01V 140

Patent

active

053094050

ABSTRACT:
Methods are provided for making use of an apparatus for generating vibrational energy in a borehole, the apparatus utilizes a mass and a rotary source for suspending the mass in a borehole or in casing in a borehole or in an instrument housing that may be positioned in an opened or cased borehole arranged to cause frictional contact with the surface of the rotating mass, the mass being rotatable about is rotational axis in one direction to cause it to backward whirl in the opposite direction, the centrifugal force of the whirling mass serving to generate vibrational energy that is used to obtain geophysical information as to the structure of the earth surrounding and adjacent to the borehole and for enhancing cementing and production enhancing techniques in oil or gas wells.

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