| 主权项 |
1. A system to detect a downhole lateral, the system comprising:
a subsurface unit including a ruggedized encapsulation, the subsurface unit configured to be introduced into a motherbore via a motherbore surface entry and having a uphole end and a downhole end relative to the motherbore surface entry, the ruggedized encapsulation configured to be high-temperature resistant, high-pressure resistant, and acid resistant, the subsurface unit including:
a control and communication subsystem disposed within the uphole end of the subsurface unit, the control and communication subsystem including:
a controller configured to control operations of the subsurface unit,a wideband signal generator configured to generate an electromagnetic signal,a modulator responsive to the controller and the signal generator and configured to modulate the electromagnetic signal to generate a modulated signal,a transmitter responsive to the controller and the modulator and configured to transmit the modulated signal,a duplexer responsive to the controller and the transmitter and configured to allow for a bidirectional signal path,a receiver responsive to the controller and the duplexer and configured to receive signals indicative of reflections of an electromagnetic pulse conveyed to the receiver via the duplexer, the reflections of the electromagnetic pulse characterizing a received signal,a demodulator responsive to the controller and configured to demodulate the received signal, thereby to generate a demodulated signal, and a communication module configured to receive the demodulated signal, anda tool head disposed within the downhole end of the subsurface unit, the tool head including:
one or more wideband antennas, the one or more wideband antennas responsive to the duplexer and the transmitter and configured to convert the modulated signal transmitted by the transmitter into the electromagnetic pulse and radiate the electromagnetic pulse through a downhole environment, the one or more wideband antennas further configured to detect the reflections of the electromagnetic pulse and provide signals indicative of the reflections of the electromagnetic pulse to the receiver via the duplexer;a wireline configured to allow for data and power transfer; anda surface unit, the surface unit comprising:
one or more processors configured to receive data from the communication module via the wireline,one or more displays in communication with the one or more processors, andtangible computer-readable medium in communication with the one or more processors, the tangible computer-readable medium having stored therein a plurality of operational modules, including a signal processing module configured to process the demodulated signal thereby to detect the presence and location of laterals and sidetracks in the downhole environment, the one or more displays configured to display the presence and location of laterals and sidetracks in the downhole environment. |
