Earth penetrating apparatus for obtaining sediment samples, driv

Details Earth penetrating apparatus for obtaining sediment samples, driv Earth penetrating apparatus for obtaining sediment samples, driv

1996-10-08

1998-06-30

Tsay, Frank

Boring or penetrating the earth

Tool actuation by reaction of rotating eccentric mass

175 56, 173 49, E21B 724

Patent

active

057719853

ABSTRACT:
A motor driven eccentric vibrator with a spring isolated biasing mass for applying force to an earth penetrating device to cause the device to penetrate into the earth. The vibrator is rigidly attached to a housing which is rigidly attached to the earth penetrating element, which may be a sampling/core tube, while the biasing mass is suspended from the housing by a suspension that allows relative motion between the housing and the biasing mass in a vertical direction parallel to the longitudinal axis of the earth penetrating element. The biasing mass serves to apply a down force on the housing while not significantly reducing the amplitude of the vibrational displacement of the housing in a vertical direction. This mass also reduces the vibrational displacement of the housing in a horizontal direction caused by a single eccentric vibrator.

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