Acoustics – Geophysical or subsurface exploration – Seismic wave detection
Patent
1989-05-12
1991-07-16
Steinberger, Brian S.
Acoustics
Geophysical or subsurface exploration
Seismic wave detection
181102, 367911, 367912, G01V 140
Patent
active
050317199
ABSTRACT:
An instrument for sensing seismic waves and determining their direction of propagation is operable at considerable depth in a borehole. It comprises a short, stubby sensor module with means to clamp it to the borehole wall and including three accelerometers, and connected by a flexible umbilical cord to a primary module suspended by a cable. The down-hole electronics and the power supply for the clamp means are provided in the primary module. The sensor module has a fundamental resonant frequency about 1 kHz, well above the frequency of the seismic waves it is subjected to, so that the signals from the accelerometers accurately represent those waves.
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Baria Roy
Gillatt Robert
Halladay Nigel P. J.
Hinds William R.
Steinberger Brian S.
The Secretary of State for Energy in Her Britannic Majesty's Gov
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