Downhole pulse radar

Patent · 28 September 1987

OSTI ID:6866222

Chang, Hsi-Tien

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.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• Assignee: SNL; EDB-88-179324
• Patent Number(s): PATENTS-US-A6101536
• OSTI ID: 6866222
• Country of Publication: United States
• Language: English

Related Subjects

440300 -- Miscellaneous Instruments-- (-1989)
440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ANTENNAS
DESIGN
DIAGRAMS
ELECTRICAL EQUIPMENT
EQUIPMENT
FLOWSHEETS
INVENTIONS
MEASURING INSTRUMENTS
RADAR
RANGE FINDERS
WELL LOGGING EQUIPMENT