Halliburton Energy Services, Inc.

Yusef H Alaas

Krishna M Ravi

Thanh Thien Tran

Sudhir Kumar Gupta

William Joseph Schaecher

Aram Shihab Khaleel Almuhana

A disclosed subsurface detection system includes a first communication device positioned in a borehole and configured to scan a plurality of frequencies in at least a portion of an annulus surrounding an exterior of a tubing including the casing string in the borehole or an interior of the tubing including the casing string. The plurality of frequencies include a first frequency corresponding to a first type of RFID tag and a second frequency corresponding to a second type of RFID tag. The first communication device is further configured to detect a response to the scan from an RFID tag of the first type or the second type in the portion of the annulus or the interior of the tubing. The system further includes a processor configured to receive communication of the detected response from the first communication device, and based on the detected response, determine one or more characteristics of an environment around the corresponding RFID tag (e.g., an intrinsic impedance of a fluid material in the environment).

Method of detecting presence of RFID tags and determining properties of surrounding environment in subterranean formation

A ground fault immune power and data delivery system for downhole sensors is connected to a downhole motor via a three-phase power cable. An AC power supply and sensor data module are electrically connected to one of two conductors (phases) at a time selected from the three conductors (phases) to provide power and data signals to the downhole sensors. If a ground fault is detected on one of the two connected phases, an isolation module isolates the grounded phase and switches to the ungrounded connected phase to continue transmitting power and data signals. A frequency of AC power supply, data communication frequencies and a switching frequency of a drive controlling the downhole motor are orthogonal to each other in order to mitigate interference. Surface-to-downhole communication can occur by adjusting voltage, frequency and/or phase of AC power supply controlled by a processor.

Growing community of inventors

Houston, TX, United States of America

Yusef H Alaas