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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. 7 figs.

Inventors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
OSTI Identifier:
6866222
Patent Number(s):
PATENTS-US-A6101536
Assignee:
SNL; EDB-88-179324
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; RADAR; DESIGN; ANTENNAS; FLOWSHEETS; INVENTIONS; WELL LOGGING EQUIPMENT; DIAGRAMS; ELECTRICAL EQUIPMENT; EQUIPMENT; MEASURING INSTRUMENTS; RANGE FINDERS; 440400* - Well Logging Instrumentation; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Chang, Hsi-Tien. Downhole pulse radar. United States: N. p., 1987. Web.
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Chang, Hsi-Tien. Downhole pulse radar. United States.
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Chang, Hsi-Tien. 1987. "Downhole pulse radar". United States.
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@article{osti_6866222,
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. 7 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6866222}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {9}
}
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