CABLE INTEGRITY MONITOR FOR ELECTROMAGNETIC TELEMETRY SYSTEMS

摘要

In some embodiments, an apparatus and a system, as well as a method and an article, may include a signal integrity monitor that senses the signal transmitted between a surface device and a downhole device. The signal integrity monitor is adapted to disconnect power from the communication system if a fault in the communication line is detected.

主权项

1. An apparatus, comprising:
a downhole metal structure; a downhole receiver in electrical communication with the downhole metal structure; a surface transmitter in electrical communication with the downhole metal structure; wherein the surface transmitter is configured to transmit a signal communicating both power and data to the downhole receiver; and a signal monitor that comprises a comparator circuit to monitor electrical communication between the surface transmitter and the downhole receiver, and if a fault in the electrical communication between the surface transmitter and the downhole receiver is sensed, to disconnect the surface transmitter from the downhole metal structure.