Surface acoustic wave pipe identification system

Details Surface acoustic wave pipe identification system Surface acoustic wave pipe identification system

G - Physics

01

V

325/16, 325/28,

G01V 1/00 (2006.01) E21B 19/20 (2006.01) E21B 47/09 (2006.01) E21B 47/12 (2006.01) E21B 47/14 (2006.01) G01S 13/75 (2006.01) G06K 7/10 (2006.01) G06K 19/067 (2006.01)

Patent

CA 1291557

ABSTRACT OF THE DISCLOSURE A drill pipe identification system automatically provides an identification number for each drill pipe as the drill pipe is being lowered into or withdrawn from the well. The system has a SAW identification device which is mounted in a cylindrical cavity which is formed within a tool joint of each section of drill pipe. The cavity has an aperture leading to the exterior of the tool joint to allow radio frequency signals to be received and reradiated. The SAW device receives signals from a transmitter and receiver, modulates the signals and reradiates them in a manner that corresponds to an encoded number in the SAW device.

546999

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