Method and apparatus for improved communication in a wellbore ut

Details Method and apparatus for improved communication in a wellbore ut Method and apparatus for improved communication in a wellbore ut

1996-10-18

1999-11-30

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

3408533, 3408543, G01V 140

Patent

active

059954493

ABSTRACT:
A method and apparatus is provided for communicating a control signal in a wellbore between a transmission node and a reception node through an acoustic transmission pathway which extends between the transmission node and the reception node. A transmission apparatus is provided at the transmission node which is in communication with the acoustic transmission pathway. The transmission apparatus generates a serial acoustic transmission which includes a control signal. A reception apparatus is provided at the reception node. The reception apparatus includes a sensor assembly which detects the serial acoustic transmission. Furthermore, the reception apparatus includes a means for decoding the control signal from the series acoustic transmission. The reception apparatus also includes a clock for generating a synchronizing clock signal and a demodulator which maps a predefined plurality of available control signals to a predefined output at a particular one of a plurality of available output pins in the reception apparatus. An electrically actuable wellbore tool is electrically coupled to a particular one of the plurality of available output pins, and may be actuated by the predefined output.

REFERENCES:
patent: 4908804 (1990-03-01), Rorden
patent: 5148408 (1992-09-01), Matthews
patent: 5191326 (1993-03-01), Montgomery
patent: 5579283 (1996-11-01), Owens et al.
patent: 5592438 (1997-01-01), Rorden et al.

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