METHOD AND DEVICE FOR ACOUSTIC ROCK SURVEY AND ACOUSTIC ISOLATOR APPLIED IN THEM Russian patent published in 2008 - IPC G01V1/52 

FIELD: physics; mining.

SUBSTANCE: acoustic isolator for attenuation of acoustic signals propagating over well instrument includes several U-shaped links with two lug sets on each link. Also isolator includes several intermediary elements with crossed joint link points, positioned between interacting lug sets. U-shaped links are connected to intermediary elements by connection pins maintaining restricted bend yielding of isolator. Isolator can be made of metal and/or composite materials. Device of acoustic survey for mineral rock around a well includes hollow element reaching explored rock over well shaft, emitter mounted in the hollow element, receiver mounted in the hollow element at some distance from emitter, and acoustic isolator. Acoustic survey method for mineral rock around well shaft involves putting hollow element with emitter and receiver mounted at some distance from each other into well shaft, excitation of acoustic wave source in the emitter to generate acoustic signals, attenuation of acoustic signals passing over hollow element from emitter to receiver by acoustic isolator mounted in the hollow element between emitter and receiver, reception of signals transmitted through rock and acoustic isolator by receiver mounted at the acoustic isolator side opposite to emitter.

EFFECT: stable distance between logging instrument emitter and receiver in axial and circular direction.

19 cl, 5 dwg