Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1988-09-13
1989-09-05
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Well logging
367 31, 367911, G01V 114, G01V 140
Patent
active
048629910
ABSTRACT:
A transmitter for a sonic wall logging tool contains a piston, the plane of the piston being disposed along the longitudinal axis of the tool. The piston moves, in its entirety, transversely with respect to the tool when an alternating current flows in two coils disposed in magnetic fields created by two mangets. Sonic positive pressure waves are created on one side of the piston, and sonic negative pressure waves are created on the other side of the piston. Shear waves are created in the formation, a positive shear wave being created in the formation on one side of the tool, and a negative shear wave being created in the formation on the other side of the tool.
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The Technical Review, vol. 35, No. 3, "New Ways to Make Shear Waves".
Borehole Geophysics 2, "Development of a Suspension PS Logging System's By. Kenji Tanaka, Shingo Inoue and Kimio Ogura", OMO Corp. Japan.
Geophysics, vol. 45, No. 10 (Oct. 1980): P. 1489-1506 23 FIGS. I Table "A New Method for Shear Wave Logging", By: Choro Kitsunezaki.
Butsuri-Tanko (Geophysical Exploration) vol. 36, No. 6 (1983), Receivers and Sources in the Suspension Type Shear Wave Logging by: Choro Kitsunezaki.
Hoyle David C.
Walulik James J.
Wignall Albert H.
Bouchard John H.
Garrana Henry N.
Moskowitz Nelson
Schlumberger Technology Corporation
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