Data communications system

摘要

A data communications system and associated method of data transmission for transmitting data over a three phase power system between a surface and a sub-surface location for an arrangement such as an oil field electrical submersible pump, on each of the three conductors of a three phase cabled connection with an isolation mechanism operable to isolate any given conductor when a fault associated with that conductor is detected. With the system providing a separate AC signal and data transfer on each conductor isolation can be achieved whilst enabling continued operation.

主权项

1. A data communications system for transmitting data over a three phase power system on a multi-conductor power cable between a surface and a sub-surface location, the data communications system comprising:
a surface system module provided with a power supply providing an AC power signal coupled to each conductor of the multi-conductor power cable; and a sub-surface system module providing a first powered module and a second powered module wherein the second powered module provides a data communications signal coupled to each conductor, wherein the multi-conductor power cable being provided between the surface system module and the sub-surface system module to transmit the AC power signal and the data communications signal, and wherein the surface system module comprises an isolation unit configured to selectively isolate each conductor of the multi-conductor power cable.