Patent ID: 9394785
Filing Date: 2016-07-19
CPC Classification: E21B

Claim Text:
1. A method of making measurements in a well, comprising: associating a first communication assembly with the exterior of a casing string being placed in a borehole, wherein the first communication assembly is configured to communicate with radio frequency identification device (RFID) tags in the annulus surrounding the casing when the casing is in place within the borehole; wherein the first communication assembly includes a plurality of RFID sensor assemblies, with a first RFID sensor assembly configured to detect RFID tags in a first azimuthal area of the annulus, and a second RFID sensor assembly configured to detect tags in a second azimuthal region of the annulus, and wherein the first azimuthal region of the annulus is at least partially offset from the second azimuthal region of the annulus; pumping a first fluid into the annulus surrounding the casing, the fluid containing a first plurality of RFID tags; and interrogating the first plurality of RFID tags by the first communication assembly to determine the presence or absence of RFID tags within the first and second azimuthal regions of the annulus proximate the depth of the first communication assembly.