Drill pipe identification method and system

Details Drill pipe identification method and system Drill pipe identification method and system

1978-06-23

1980-05-13

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

73151, 175 40, G06K 708, E21B 4700, E21B 1100

Patent

active

042024900

ABSTRACT:
Numbers in binary form comprising apertures filled with non-magnetic material are formed in the outer periphery of drill pipe sections for identification purposes. The numbers are read by a sensor and recorded as the drill pipe sections are lowered into a well bore in order to keep track of the position of the pipe sections in the drill string and to obtain a cumulative record of the service time of each drill pipe section for the purpose of determining fatigue damage. The sensor comprises an encircling electrical coil which generates a magnetic field in the walls of the drill pipe sections as they are moved through the coil and a second electrical coil which is rotated around the drill pipe section in the vicinity of the encircling coil for detecting the magnetic field next to the filled encloding apertures of the identification numbers.

REFERENCES:
patent: 3058532 (1962-10-01), Alder
patent: 3117445 (1964-01-01), Brown et al.
patent: 3233647 (1966-02-01), Newell
patent: 3508031 (1970-04-01), Cooper et al.
patent: 3774445 (1973-11-01), Rundell et al.
patent: 3813659 (1974-05-01), Charlton

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