High-power well logging method and apparatus

摘要

A computer-controlled system to deliver power downhole into a borehole (14) which comprises: a multiconductor logging cable (20) configured to transport a power signal and a telemetry signal; a toolstring (12) coupled to the multiconductor logging cable (20) to receive the power signal, said toolstring (12) including a voltage detector configured to measure a received voltage of the power signal to responsively provide said telemetry signal to the multiconductor logging cable (20); a programmable power supply (32) coupled to the cable to provide said power signal; a telemetry receiver (28) coupled to the cable to receive said telemetry signal, said telemetry receiver (28) configured to convert said telemetry signal into a voltage measurement; and a computer (30) coupled to the telemetry receiver (28) to receive the voltage measurement and configured to control the programmable power supply (32) to regulate the received voltage of the power signal.