Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1986-04-23
1987-10-20
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367911, G01V 100
Patent
active
047018909
ABSTRACT:
A logging sonde for evaluating underground formations traversed by a borehole is disclosed. The sonde contains a frame which is free to rotate relative to the cylindrical body of the sonde. The frame supports a plurality of detector means including at least one detector which is free to rotate relative to the frame. Also attached to the frame are locking means including braking means and a solenoid for disengaging the braking means from their engaged surfaces. In a rest position, the braking means are arranged in such a manner as to lock the detector means relative to the cylindrical body. The invention is applicable, in particular, to geophones intended to detect seismic waves along three orthogonal axes, including a vertical axis, regardless of the tilt of the sonde.
REFERENCES:
patent: 3475722 (1969-10-01), White
patent: 4021774 (1977-05-01), Asmondsson et al.
patent: 4078223 (1978-03-01), Strange
patent: 4534020 (1985-08-01), O'Brien
patent: 4563757 (1986-01-01), Decorps et al.
Delpuech Alain G. M.
Ohmer Herve
Coker David G.
Gordon David P.
Kyle Deborah L.
Lee Peter
Parr Ted L.
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