Antenna array for tracking an object
A system for tracking drilling tubulars may include a tag arranged on a drilling tubular and an antenna array comprising a plurality of antennas configured for capturing data from the tag. The plurality of antennas may be arranged in a radial pattern, and facing inward toward a longitudinal axis. The antenna array may be arranged below a drill floor of a drill rig, within a mud containment system, and above a drilling mud fluid level.
1 . A system for tracking drilling tubulars in a drill string defining a longitudinal axis, comprising:
a tag arranged on a drilling tubular; and
an antenna array comprising a plurality of antennas configured for capturing data from the tag, the plurality of antennas arranged in a radial pattern in a single plane, on a diameter ranging from 54 inches to 84 inches, and facing inward toward the longitudinal axis, the plurality of antennas being oriented such that a field window is established that extends 12 inches along the longitudinal axis and within which data is captured by the plurality of antennas.
2 . The system of claim 1 , wherein the antenna array is configured for capturing data from the tag operable at one of two frequencies including 865-868 MHz and 902-928 MHz.
3 . The system of claim 1 , further comprising one or more antennas arranged out of plane.
4 . The system of claim 1 , wherein the diameter ranges from 54 inches to 60 inches.
5 . The system of claim 4 , wherein the antenna array is configured for capturing data from the tag operable at either of two frequencies including 865-868 MHz and 902-928 MHz.