| 摘要 |
An apparatus for transmitting electricity between downhole well tools and the well surface. The apparatus incorporates a surface controller in combination with a conductor and a downhole receiver module. A choke prevents electricity from the controller from entering a high voltage DC power source, and a downhole regulator 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 also includes a transmitter and a modulator operable to generate an electric signal representating at least two states, wherein a first state is represented by a signal, and wherein a second state is represented by the absence of an electric signal. A receiver module receives the electric signals and selectively transmits commands to the associated well tool or to the surface controller. In a two conductor wire, the conductors are evenly spaced so that attenuation of the signals is reduced. The controller can transmit a signal unique to a well tool which is selectively identified by the receiver module for operation of a specific well tool. |
