FIELD: means for transmitting measuring-signals from the well to the surface, namely for logging while drilling.
SUBSTANCE: hollow pipe comprising logging grout is moved from day surface into borehole during logging of ground formation inside borehole. Then logging device string is moved from the first position, in which the string is located inside the pipe, into the second position, in which the string is arranged outside the pipe near pipe end and suspended in the second position. System has pressure pulse forming device, which generates pressure pulses in above pipe. Pressure pulse forming device is installed so that above device may exchange data with logging device. Control unit is arranged so that the control unit is hydraulically communicated with borehole grout mass to receive above pressure pulses. Ground base logging is initiated by means of logging device string and pressure pulses are generated in borehole by means of pressure pulse forming device. Above pressure pulses characterize data, which are transmitted via logging device string into pressure pulse forming device during logging operation carried out by means of logging device string.
EFFECT: increased speed of logging data transmission to day surface.
11 cl, 3 dwg
