FIELD: bore-hole drilling equipment and instrumentation. SUBSTANCE: method can be used for monitoring bottom-hole parameters at drilling and geophysical investigations of wells. According to method, transmission of electric signals occurred in result of creating electric potential between mass of drilling string and emitting electrode installed in washing liquid at bottom part of drilling string is effected through washing liquid and current-conducting metal of drilling string which are electrically separated from each other by oxidic layer. In given case, used is phenomenon appearing due to different electric conductivity of metal of drilling string pipes, washing liquid and surface layer of drilling pipes created by oxidic film. Electric signals are transmitted through pipe metal and washing liquid which are separated by surface layer having substantially less electrical conductivity than metal and washing liquid. Electric signal is received by receiving device installed at well head. Receiving electrode of device is located in washing liquid. Parameters of drilling are evaluated according to electric current flowing between receiving electrode and string of drilling pipes. Application of aforesaid method ensures more reliable reception of information signals at very low power capacity of emitter. EFFECT: higher efficiency. 1 dwg
