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Title: Impedance matched joined drill pipe for improved acoustic transmission

Abstract

An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

Inventors:
 [1]
  1. (San Mateo, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873182
Patent Number(s):
6108268
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
impedance; matched; joined; drill; pipe; improved; acoustic; transmission; jointed; passive; means; method; maximizes; amplitude; minimize; temporal; dispersion; signals; string; measurement; drilling; telemetry; improvement; signal; accomplished; replacing; standard; joints; constructed; material; acoustically; connected; provides; technique; utilized; logging; directional; dynamics; gamma-ray; spectroscopy; post; shot; boreholes; signal transmission; acoustic signals; drill string; acoustic signal; impedance matched; gamma-ray spectroscopy; directional drilling; drill pipe; improved acoustic; ray spectroscopy; acoustic transmission; /367/175/340/439/

Citation Formats

Moss, William C. Impedance matched joined drill pipe for improved acoustic transmission. United States: N. p., 2000. Web.
Moss, William C. Impedance matched joined drill pipe for improved acoustic transmission. United States.
Moss, William C. Sat . "Impedance matched joined drill pipe for improved acoustic transmission". United States. https://www.osti.gov/servlets/purl/873182.
@article{osti_873182,
title = {Impedance matched joined drill pipe for improved acoustic transmission},
author = {Moss, William C.},
abstractNote = {An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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