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Title: Downhole pulse radar

Abstract

A borehole logging tool generates a fast rise-time, short duration, high peak-power radar pulse having broad energy distribution between 30 MHz and 300 MHz through a directional transmitting and receiving antennas having barium titanate in the electromagnetically active region to reduce the wavelength to within an order of magnitude of the diameter of the antenna. Radar returns from geological discontinuities are sampled for transmission uphole.

Inventors:
 [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
866890
Patent Number(s):
4814768
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
downhole; pulse; radar; borehole; logging; tool; generates; fast; rise-time; duration; peak-power; broad; energy; distribution; 30; mhz; 300; directional; transmitting; receiving; antennas; barium; titanate; electromagnetically; active; region; reduce; wavelength; magnitude; diameter; antenna; returns; geological; discontinuities; sampled; transmission; uphole; radar pulse; barium titanate; active region; energy distribution; receiving antenna; logging tool; borehole logging; pulse radar; fast rise-time; /342/324/

Citation Formats

Chang, Hsi-Tien. Downhole pulse radar. United States: N. p., 1989. Web.
Chang, Hsi-Tien. Downhole pulse radar. United States.
Chang, Hsi-Tien. Sun . "Downhole pulse radar". United States. https://www.osti.gov/servlets/purl/866890.
@article{osti_866890,
title = {Downhole pulse radar},
author = {Chang, Hsi-Tien},
abstractNote = {A borehole logging tool generates a fast rise-time, short duration, high peak-power radar pulse having broad energy distribution between 30 MHz and 300 MHz through a directional transmitting and receiving antennas having barium titanate in the electromagnetically active region to reduce the wavelength to within an order of magnitude of the diameter of the antenna. Radar returns from geological discontinuities are sampled for transmission uphole.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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