Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1987-02-02
1989-10-03
Steinberger, Brian S.
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181119, 181401, 367189, G01V 102
Patent
active
048710458
ABSTRACT:
Apparatus including transportation structure for generating elliptically polarized shear waves in soft earth medium. A suitable carrier includes a jack assembly for transporting shear wave apparatus that includes a telescoping tube for earth engagement. The shear wave apparatus, including a major or lower reaction mass and a passive top reaction mass, is raised and lowered by the jack assembly into operative position while the energy-coupling telescoping tube is extendably forced into an earth medium so that, during shear wave generation, the vibration source or reaction mass is continually imparting shear wave energy into the progressively extending telescoping tube to effect continual energy coupling into the surrounding earth medium. The reaction mass is driven by a plural hydraulic actuator system that imparts elliptically polarized vibration to the telescopic tube which, in turn, imparts elliptically polarized shear waves into the surrounding earth medium.
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Conoco Inc.
Steinberger Brian S.
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