DOWN-HOLE LOGGING INSTRUMENT Russian patent published in 2004 - IPC

FIELD: seismic prospecting. SUBSTANCE: down-hole logging instrument has body housing geophones and electronic unit, stabilizing members, pressure lever placed diametrically opposite to these members. Stabilizing members come in the form of thin-walled split bushings with protrusions of streamlined shape lengthened along axis of instrument and embracing instrument body. Bushings are provided with unit for their attachment to instrument body. EFFECT: prevented emergence of rotary vibrations of instrument, eliminated effect of them on seismic recording in process of seismic prospecting both in cased and uncased holes. 2 cl, 4 dwg