Downhole pulse radar

Title: Downhole pulse radar

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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:: Chang, Hsi-Tien

Issue Date:: 1987-09-28

Research Org.:: Sandia National Labs., Albuquerque, NM (USA)

OSTI Identifier:: 6866222

Patent Number(s):: -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)

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                    Chang, Hsi-Tien. Downhole pulse radar.  United States: N. p., 1987. 
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                    Chang, Hsi-Tien. Downhole pulse radar.  United States.

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                    Chang, Hsi-Tien. Mon .  
        "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          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1987},

  month        = {9}

}

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