Power transmission system for use with downhole equipment

摘要

A power transmission system for use with downhole equipment in a borehole, comprising a power source (12) positioned at the surface providing a DC power supply and a downhole DC/DC converter (16), connected to the power source by a two-conductor cable (14) and which takes the DC voltage supply as an input and provides an output DC supply at a different voltage to the DC power supply for provision to the downhole equipment (18).