Downhole pulse radar

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:866890

Chang, Hsi-Tien ^[1]

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1. Albuquerque, NM

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.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4814768
• OSTI ID: 866890
• Country of Publication: United States
• Language: English

Related Subjects

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
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