Surface acoustic wave pipe identification system

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

1986-12-17

1987-10-06

Jordan, Charles T.

Communications: electrical

Wellbore telemetering or control

Selective control of subsurface equipment

367911, 342 44, 175 40, G01V 100

Patent

active

046986316

ABSTRACT:
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system automatically provides an identification number for each drill pipe as the drill pipe is being lowered into or withdrawn from the well.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.

REFERENCES:
patent: 2166212 (1939-07-01), Hayward
patent: 2629257 (1953-02-01), Link
patent: 3706094 (1972-12-01), Cole et al.
patent: 3981011 (1976-09-01), Bell
patent: 4061967 (1977-12-01), Hall
patent: 4156229 (1979-05-01), Shawhan
patent: 4202490 (1980-05-01), Gunkel et al.
patent: 4468959 (1984-09-01), Roberts

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