Borehole seismic receiver

Details Borehole seismic receiver Borehole seismic receiver

1985-08-29

1987-12-29

Kyle, Deborah L.

Acoustics

Geophysical or subsurface exploration

Well logging

181401, 367911, 166 66, 166212, G01V 140

Patent

active

047154691

ABSTRACT:
A seismic receiver is provided for measuring seismic signals transmitted through the earth and received in a well borehole. A reversible electrical motor drives a harmonic drive reducer which amplifies the torque provided to drive a ball screw. The ball screw moves linearly along the axis of the well borehole to control the extension of a clamp arm into and out of an extended position in contact with subsurface earth adjacent the well borehole. A releasable electric clutch is provided so the receiver is retrievable in the event of a power failure while the clamp arm is extended.

REFERENCES:
patent: 2699001 (1987-03-01), McMahan
patent: 3426865 (1969-02-01), Henry
patent: 3661205 (1972-05-01), Belorgey
patent: 4365668 (1982-12-01), Bright
patent: 4428422 (1984-01-01), Laurent
patent: 4509149 (1985-04-01), Ruehle
patent: 4563757 (1986-01-01), Decorps et al.
patent: 4575831 (1986-03-01), Decorps et al.
Brochure Borehole Seismometer, Model VLP-N785, EG&G Geometrics.

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