POWER SUPPLY SYSTEM OF INSTRUMENTS FOR LOGGING OF WELLS Russian patent published in 2000 - IPC

FIELD: gas and oil industry, specifically, devices switching on independent instruments lowered to face of well. SUBSTANCE: given power supply system of instruments for logging of wells has ground and face units interconnected by two-wire communication line. Face unit includes pulse voltage stabilizer connected to two-wire communication line. Ground unit incorporates voltage source and current-to-voltage converter whose conversion factor is set equal to resistance of two-wire communication line. Current input of current-to-voltage converter is placed in series with first wire of two-wire communication line. First output of current-to-voltage converter is linked to one of poles of voltage source whose second pole is connected to second wire of two-wire communication line. Second output of current-to-voltage converter is connected via first current input to first wire of two-wire communication line. EFFECT: creation of reliable conditions for switching on and functioning of pulse voltage converter with any length of communication line. 4 dwg