Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Patent
1994-12-09
1996-09-03
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
367 82, 367 35, G01S 1386, G01S 1306, G01S 728
Patent
active
055527868
ABSTRACT:
A method of logging an underground formation from within a borehole includes the steps of emitting an electromagnetic signal from a first location in a borehole, determining a time at which the signal is emitted, detecting a direct component of the signal which has passed from the first location to a second location without being reflected, determining a time at which the direct component arrives at the second location and determining the speed of the signal in the underground formation from the time at which the signal is emitted, the time of arrival of the direct component and the spacing of the first and second locations. The speed of the signal can be used for radar logging of the formation. A logging tool for performing the method includes a transmitter at a first position in a tool body for emitting an electromagnetic signal, means located in the tool body for determining a time at which the signal is emitted, a receiver at a second position in the tool body for detecting a signal which has passed from the transmitter to the receiver through an underground formation; and means located in the tool body for processing the detected signal using the time at which a corresponding signal is emitted from the transmitter.
REFERENCES:
patent: 4161731 (1979-07-01), Barr
patent: 4218678 (1980-08-01), Fowler et al.
patent: 4297699 (1981-10-01), Fowler et al.
patent: 4430653 (1984-02-01), Coon et al.
patent: 4524435 (1985-06-01), Helbig et al.
patent: 4670717 (1987-06-01), Sender
patent: 4689569 (1987-08-01), Duff
patent: 4814768 (1989-03-01), Chang
patent: 4866680 (1989-09-01), Scherbatskoy
patent: 4953147 (1990-08-01), Cobb
patent: 5012453 (1991-04-01), Katz
patent: 5113379 (1992-05-01), Scherbatskoy
Gaylor Richard W.
Habashy Tarek M.
Mariani, deceased David R.
Xia Jiqing
Hyden Martin D.
Pojunas Leonard W.
Schlumberger Technology Corporation
Sotomayor John B.
LandOfFree
Method and apparatus for logging underground formations using ra does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for logging underground formations using ra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for logging underground formations using ra will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1953571