Methods and apparatus for use in detecting seismic waves in...

Details Methods and apparatus for use in detecting seismic waves in... Methods and apparatus for use in detecting seismic waves in...

2006-05-23

2006-05-23

San Martin, Edgardo (Department: 2837)

Acoustics

Geophysical or subsurface exploration

Well logging

C181S112000, C181S122000, C367S035000

Reexamination Certificate

active

07048089

ABSTRACT:
The invention provides methods and apparatus for detecting seismic waves propagating through a subterranean formation surrounding a borehole. In a first embodiment, a sensor module uses the rotation of bogey wheels to extend and retract a sensor package for selective contact and magnetic coupling to casing lining the borehole. In a second embodiment, a sensor module is magnetically coupled to the casing wall during its travel and dragged therealong while maintaining contact therewith. In a third embodiment, a sensor module is interfaced with the borehole environment to detect seismic waves using coupling through liquid in the borehole. Two or more of the above embodiments may be combined within a single sensor array to provide a resulting seismic survey combining the optimum of the outputs of each embodiment into a single data set.

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