Acoustic data transmission through a drillstring

Title: Acoustic data transmission through a drillstring

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Abstract

A method and apparatus for acoustically transmitting data along a drillstring is presented. In accordance with one embodiment of the present invention, acoustic data signals are conditioned to counteract distortions caused by the drillstring. Preferably, this conditioning step comprises multiplying each frequency component of the data signal by exp (-ikL) where L is the transmission length of the drillstring, k is the wave number in the drillstring at the frequency of each component and i is (-1).sup.1/2. In another embodiment of this invention, data signals having a frequency content in at least one passband of the drillstring are generated preferably traveling in only one direction (e.g., up the drillstring) while echoes in the drillstring resulting from the data transmission are suppressed.

Inventors:

Drumheller, Douglas S ^[1]

Cedar Crest, NM

Publication Date:: 1992-01-01

Research Org.:: AT&T

OSTI Identifier:: 868382

Patent Number(s):: US 5128901

Assignee:: Teleco Oilfield Services Inc. (Meriden, CT)

DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: acoustic; data; transmission; drillstring; method; apparatus; acoustically; transmitting; accordance; embodiment; signals; conditioned; counteract; distortions; caused; preferably; conditioning; step; comprises; multiplying; frequency; component; signal; exp; -ikl; length; wave; -1; content; passband; generated; traveling; direction; echoes; resulting; suppressed; data transmission; data signals; frequency content; data signal; acoustic data; transmitting data; frequency component; /367/340/

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                    Drumheller, Douglas S. Acoustic data transmission through a drillstring.  United States: N. p., 1992. 
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                    Drumheller, Douglas S. Acoustic data transmission through a drillstring.  United States.

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                    Drumheller, Douglas S. Wed .  
        "Acoustic data transmission through a drillstring".  United States.  https://www.osti.gov/servlets/purl/868382.

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@article{osti_868382,

  title        = {Acoustic data transmission through a drillstring},

  author       = {Drumheller, Douglas S},

  abstractNote = {A method and apparatus for acoustically transmitting data along a drillstring is presented. In accordance with one embodiment of the present invention, acoustic data signals are conditioned to counteract distortions caused by the drillstring. Preferably, this conditioning step comprises multiplying each frequency component of the data signal by exp (-ikL) where L is the transmission length of the drillstring, k is the wave number in the drillstring at the frequency of each component and i is (-1).sup.1/2. In another embodiment of this invention, data signals having a frequency content in at least one passband of the drillstring are generated preferably traveling in only one direction (e.g., up the drillstring) while echoes in the drillstring resulting from the data transmission are suppressed.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/868382},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1992},

  month        = {1}

}

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