Methods and apparatus for transmitting information through a pip

Details Methods and apparatus for transmitting information through a pip Methods and apparatus for transmitting information through a pip

1974-10-18

1977-05-31

Birmiel, Howard A.

Communications: electrical

Selective

Interrogation response

340 18P, G01V 140

Patent

active

040272826

ABSTRACT:
A device attached to a pipe string extending from the earth surface to subsurface locations, primarily for earth boring activities to transmit information from the subsurface location to the earth surface. The readings of subsurface sensors are converted to a message comprising a combination of pressure pulses in fluid in the pipe string and brief stress changes in the wall material of the pipe string detectable in the pipe string at the earth surface, the combination identifiable as representing at least part of the message and series of pulses collectively representing the content of the message being transmitted.

REFERENCES:
patent: 3732728 (1973-05-01), Fitzpatrick
patent: 3906434 (1975-09-01), Lamel et al.

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