DIAGRAM PROBE PROVIDED WITH A DEVICE FOR IMMOBILIZING A SET OF CARDANS-DETECTORS

摘要

The invention relates to a logging probe for evaluating underground formations traversed by a borehole. BR/ The probe 12 contains a frame 30 which is free to rotate relative to the cylindrical body 36 of the probe, and which supports detection means 40, 50, 60 comprising at least one free detector in rotation with respect to the frame . The chassis is furthermore provided with braking means 74, 75, 76 which, in the rest position, are engaged so as to immobilize said detection means with respect to the cylindrical body 36, and of a solenoid 71 which, when is excited, disengaging said braking means. BR/ The invention applies in particular to geophones for detecting seismic waves along three orthogonal axes including a vertical, regardless of the inclination of the probe. BR/ (CF DRAWING IN BOPI) BR/ BR/ / P