Acoustic data transmission through a drillstring
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:
-
- Cedar Crest, NM
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 868382
- Patent Number(s):
- 5128901
- Assignee:
- Teleco Oilfield Services Inc. (Meriden, CT)
- Patent Classifications (CPCs):
-
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
- 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/
Citation Formats
Drumheller, Douglas S. Acoustic data transmission through a drillstring. United States: N. p., 1992.
Web.
Drumheller, Douglas S. Acoustic data transmission through a drillstring. United States.
Drumheller, Douglas S. Wed .
"Acoustic data transmission through a drillstring". United States. https://www.osti.gov/servlets/purl/868382.
@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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}
Works referenced in this record:
Passbands for Acoustic Transmission in an Idealized Drill String
journal, May 1972
- Barnes, Thomas G.; Kirkwood, Bill R.
- The Journal of the Acoustical Society of America, Vol. 51, Issue 5B
A New Approach To Drill-String Acoustic Telemetry
conference, September 1979
- Squire, William D.; Whitehouse, H. J.
- SPE Annual Technical Conference and Exhibition, All Days