Seismic source

Details Seismic source Seismic source

1982-05-26

1986-02-11

Jordan, Charles T.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

175 1, 175296, 367911, G01V 104, E21B 4700, E21B 414

Patent

active

045694125

ABSTRACT:
A seismic source operable in deep bore holes, and especially suitable for acoustic well logging and geophysical exploration, produces a controlled-spectrum seismic impulse. The source has a hammer which is hydraulically cocked through a hydraulic transformer into a hydraulic spring. Upon command, the hammer can be released, converting stored energy in the spring to kinetic energy of hammer motion. The hammer impacts on a liquid impulse shaping spring which couples impulse energy of controlled spectral width to the formation surrounding the hole by means of a balanced piston assembly which can be prebiased against the side walls of the hole.

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