Reducing injection loss in drill strings
Abstract
A system and method for transferring wave energy into or out of a periodic structure having a characteristic wave impedance profile at a prime frequency, the characteristic wave impedance profile comprising a real portion and an imaginary portion, comprising: locating one or more energy transfer elements each having a wave impedance at the prime frequency approximately equal to the real portion of the characteristic wave impedance at one or more points on the periodic structure with the imaginary portion approximately equaling zero; and employing the one or more energy transfer elements to transfer wave energy into or out of the periodic structure. The energy transfer may be repeaters. Quarter-wave transformers can be provided at one or more points on the periodic structure with the imaginary portion approximately equaling zero to transmit waves across one or more discontinuities. A terminator can be employed for cancellation of waves. The invention substantially eliminates reflections of the wave energy at the prime frequency by joints between sections of the periodic structure.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1175038
- Patent Number(s):
- 6791470
- Application Number:
- 09/872,907
- Assignee:
- Sandia Corporation
- Patent Classifications (CPCs):
-
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Drumheller, Douglas S. Reducing injection loss in drill strings. United States: N. p., 2004.
Web.
Drumheller, Douglas S. Reducing injection loss in drill strings. United States.
Drumheller, Douglas S. Tue .
"Reducing injection loss in drill strings". United States. https://www.osti.gov/servlets/purl/1175038.
@article{osti_1175038,
title = {Reducing injection loss in drill strings},
author = {Drumheller, Douglas S.},
abstractNote = {A system and method for transferring wave energy into or out of a periodic structure having a characteristic wave impedance profile at a prime frequency, the characteristic wave impedance profile comprising a real portion and an imaginary portion, comprising: locating one or more energy transfer elements each having a wave impedance at the prime frequency approximately equal to the real portion of the characteristic wave impedance at one or more points on the periodic structure with the imaginary portion approximately equaling zero; and employing the one or more energy transfer elements to transfer wave energy into or out of the periodic structure. The energy transfer may be repeaters. Quarter-wave transformers can be provided at one or more points on the periodic structure with the imaginary portion approximately equaling zero to transmit waves across one or more discontinuities. A terminator can be employed for cancellation of waves. The invention substantially eliminates reflections of the wave energy at the prime frequency by joints between sections of the periodic structure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 14 00:00:00 EDT 2004},
month = {Tue Sep 14 00:00:00 EDT 2004}
}
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
Extensional stress waves in one‐dimensional elastic waveguides
journal, December 1992
- Drumheller, Douglas S.
- The Journal of the Acoustical Society of America, Vol. 92, Issue 6
The propagation of sound waves in drill strings
journal, April 1995
- Drumheller, Douglas S.; Knudsen, Steven D.
- The Journal of the Acoustical Society of America, Vol. 97, Issue 4
Attenuation of sound waves in drill strings
journal, October 1993
- Drumheller, Douglas S.
- The Journal of the Acoustical Society of America, Vol. 94, Issue 4
Acoustical properties of drill strings
journal, March 1989
- Drumheller, Douglas S.
- The Journal of the Acoustical Society of America, Vol. 85, Issue 3