Radar drill guidance system
Method and apparatus for tallying pipe
Synthetic pulse radar system and method
Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams
Microwave electromagnetic borehole dipmeter
Method and apparatus for measuring water level in a well
ApplicationNo. 07/101536 filed on 09/28/1987
US Classes:342/22, TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE324/333, Within a borehole324/337, To detect return wave signals324/338Within a borehole
ExaminersPrimary: Blum, Theodore M.
Assistant: Gregory, Bernarr E.
Attorney, Agent or Firm
International ClassesG01V 3/18 (20060101)
G01S 13/00 (20060101)
G01V 3/30 (20060101)
G01S 13/02 (20060101)
G01S 13/88 (20060101)
AbstractA 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.