| 摘要 |
<p>An apparatus for transmitting electricity between downhole well tools and the well surface incorporates a surface controller (12) in combination with a conductor (28) and a downhole receiver module. A choke (56) prevents electricity from the controller from entering a high voltage DC power source, and a downhole regulator (34) converts high voltage, low current power into high current, low voltage power. This feature of the invention permits a single wire to transmit sufficient power to operate multiple downhole well tools. The controller (12) also includes a transmitter and a modulator (24) operable to generate an electric signal representing at least two states, wherein a first state is represented by a signal, and the second state is represented by the absence of a signal. A receiver module receives the electric signals and selectively transmits commands to the associated well tool or to the surfaced controller (12).</p> |
