Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1992-01-23
1992-12-01
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 25, 367911, 181104, 181105, G01V 140, G01V 116
Patent
active
051684705
ABSTRACT:
A borehole logging tool having a dipole acoustic energy source and at least one spaced-apart dipole acoustic energy receiver is lowered into a deviated borehole. A motor rotates the source and receiver about the axis of the borehole tool. A first signal is produced representing source and receiver rotational position relative to rotational position of the borehole tool. A second signal is produced representing rotational position of the borehole tool relative to a vertical direction. A comparator produces a third signal of the difference between the first and second signals as a representation of source and receiver rotational position relative to the vertical direction. The motor rotates so as to minimize such third signal, thereby rotating the focus of the source and receiver in a direction perpendicular to the eccentricity of the borehole tool in the deviated borehole.
REFERENCES:
patent: Re24446 (1958-03-01), Summers
patent: 3333238 (1967-07-01), Caldwell
patent: 3362011 (1968-01-01), Zemanek, Jr.
patent: 3614891 (1971-10-01), Nolte
patent: 4383308 (1983-05-01), Caldwell
patent: 4414656 (1983-11-01), Hepp
patent: 4479564 (1984-10-01), Tanguy
patent: 4649525 (1987-03-01), Angona et al.
patent: 4736348 (1988-04-01), Bednarczyk
patent: 4800981 (1989-01-01), Uttecht et al.
patent: 4829488 (1989-05-01), Siegfried
patent: 4832148 (1989-05-01), Becker et al.
patent: 5001676 (1991-03-01), Broding
patent: 5058077 (1991-10-01), Twist
patent: 5121363 (1992-06-01), Benzing
"Eccentric dipole sources in fluid-filled boreholes: Numerical and Experimental Results", H. D. Leslie and C. J. Randall, J. Acoust. Soc. Am., Jun. 1990, pp. 2405-2421.
Dennis Charles L.
Schmitt Denis P.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Moskowitz Nelson
Speciale Charles J.
LandOfFree
Apparatus for rotating a transducer assembly of a borehole loggi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for rotating a transducer assembly of a borehole loggi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for rotating a transducer assembly of a borehole loggi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-507346