ACOUSTIC INSULATOR FOR IMPLEMENTATION INSIDE BOREHOLE Russian patent published in 2009 - IPC G01V1/52 

FIELD: mining.

SUBSTANCE: invention can be implemented for acoustic logging during drilling. The essence of the invention is as follows: an installation for performing acoustic survey during borehole drilling consists of a facility extended in lengthwise direction; the facility is delivered into a borehole on a drilling tube; also the facility and the drilling tube have lengthwise channels; drilling agent flows through the said channels; further, the installation consists of an acoustic emitter supported with the said facility and designed for generating acoustic signals in the facility, in the borehole and in rock thickness; the installation consists of an acoustic receiver supported with the said facility and assembled at a distance from the emitter; the receiver is designed to receive acoustic signals; the installation also consists of an attenuator located in the facility between the acoustic emitter and the acoustic receiver and designed to attenuate acoustic signals in the facility within limits of a preliminary specified frequency range; the attenuator includes a tubular element out of a composite material having mainly cylinder external surface with a group of bodies of certain weight and length rigidly secured on the surface and arranged at a preset interval.

EFFECT: upgraded accuracy of positioning of drilling rig relative to boundaries of deposit formations.

16 cl, 17 dwg