Apparatus for imparting seismic signals into the earth

Details Apparatus for imparting seismic signals into the earth Apparatus for imparting seismic signals into the earth

1990-02-28

1991-03-19

Jordan, Charles T.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181114, 181121, 367189, G01V 104

Patent

active

050002856

ABSTRACT:
Seismic signal generating apparatus of the impact type that includes a signal generator having an impact mass therein, a base plate or coupling member that is engaged by the impact mass to generate the signal, a housing attached to the generator that encircles the impact mass and extends toward the base plate, and means for excluding water from within the housing so that the impact mass travels only through gas prior to engaging the anvil. The apparatus also includes control means for positioning the generator angularly and azimuthally.

REFERENCES:
patent: 3482646 (1969-12-01), Brown et al.
patent: 4284164 (1981-08-01), Airhart
patent: 4284165 (1981-08-01), Airhart et al.
patent: 4402381 (1983-09-01), Airhart
patent: 4660674 (1987-04-01), Airhart
patent: 4662473 (1987-05-01), Betz
patent: 4702344 (1987-10-01), Airhart
patent: 4719607 (1988-01-01), Airhart
patent: 4721181 (1988-01-01), Airhart et al.
patent: 4799572 (1989-01-01), Airhart

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