Underwater shear wave vibrator coupling

Acoustics – Geophysical or subsurface exploration – Seismic wave generation

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Details

181114, 181401, 181402, 73665, 367 75, G01V 114, G01V 138

Patent

active

044429169

ABSTRACT:
An underwater shear wave vibrator apparatus has a housing with a vibratory generating system mounted inside the housing for generating a force along an axis substantially parallel to the underwater seabed surface. A coupling apparatus which has an attachment surface and an underside surface for engaging the seabed is connected through a pivotal arm to the housing. A hydraulic apparatus is used for positioning the seabed engaging apparatus normal to the force axis of the vibratory generating apparatus by movement about the pivotal attachment so as to maintain contact of the seabed engaging apparatus with the seabed as the vibratory generating apparatus applies force against the seabed. Apparatus is also included for maintaining orientation of the underside surface of the positioning apparatus as the positioning apparatus moves the seabed engaging means.

REFERENCES:
patent: 3159232 (1964-12-01), Fair
patent: 3372770 (1968-03-01), Clynch
patent: 3717217 (1973-02-01), Mueche et al.
patent: 4011923 (1977-03-01), Talki et al.
patent: 4050540 (1977-09-01), Chalet et al.
patent: 4064964 (1977-12-01), Norden
patent: 4135599 (1979-01-01), Fair
patent: 4219096 (1980-08-01), Airhart

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