Apparatus for the transmission of information in a drill string

Details Apparatus for the transmission of information in a drill string Apparatus for the transmission of information in a drill string

1997-02-24

1998-09-15

Tsay, Frank

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175 48, 367 83, E21B 4400, E21B 4706

Patent

active

058066128

ABSTRACT:
In a drill string pressure pulses are generated by expansion and constriction of an elastic body to transmit information along the drill string.

REFERENCES:
patent: 4078620 (1978-03-01), Westlake et al.
patent: 4535429 (1985-08-01), Russell et al.
patent: 4553226 (1985-11-01), Scherbatskoy
patent: 4557295 (1985-12-01), Holmes
patent: 4784229 (1988-11-01), Ostkamper et al.
patent: 4805449 (1989-02-01), Das
patent: 5583826 (1996-12-01), Chin

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