Down hole seismographic source

Details Down hole seismographic source Down hole seismographic source

1987-06-25

1989-03-28

Steinberger, Brian S.

Acoustics

Geophysical or subsurface exploration

Well logging

181119, 367143, 367171, 367172, 367911, G01V 140

Patent

active

048155578

ABSTRACT:
A seismic energy source provides a bias pressure and oscillating pressure force on a piston mounted transversely to the major axis of the well bore and in pressure contact with the wall of the well bore. A seismographic energy wave is generated in the surrounding earth by oscillating the pressure of the piston against the well wall. This apparatus uses the pressure of ambient fluid in the well bore to reduce the power required to provide pressure contact and to oscillate the piston against the wall.

REFERENCES:
patent: 3221833 (1965-12-01), Malmberg
patent: 3718205 (1973-02-01), Fair et al.
patent: 4030063 (1977-06-01), Wallen
patent: 4252210 (1981-02-01), Sodich
patent: 4569412 (1986-02-01), Bouyoucos et al.
patent: 4648478 (1987-03-01), Dedole et al.
patent: 4702343 (1987-10-01), Paulsson

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