Data communications system

摘要

A system and method for transmitting data over a three phase power system between a surface and a sub-surface location. A first power supply providing a first AC power signal and a second power supply providing a second AC power signal are at the surface. A first powered module and a second powered module which provides a data communications signal are at the sub-surface. A cable connection is provided between the surface and the sub-surface to transmit the power and data communication signals. The data communications signal provides an indication of power applied to the second powered module and a power signal is varied in response to the applied power. The invention finds specific application monitoring down hole equipment such as an electrical submersible pump in a wellbore.

主权项

1. A data communications system for transmitting data over a three phase power system between a surface and a sub-surface location, the data communications system comprising:
a surface system module provided with a first power supply providing a first AC power signal and a second power supply providing a second AC power signal; 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; and a cable connection provided between the surface system module and the sub-surface system module to transmit the first AC power signal, the second AC power signal, and the data communications signal, wherein the data communications signal provides an indication of power applied to the second powered module and a power signal is varied in response to the applied power.