Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1991-10-10
1992-05-12
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Well logging
181112, 181401, 367 25, 367911, G01V 140, E21B 33127
Patent
active
051119030
ABSTRACT:
A signal receiving system adapted to be lowered into a drilling and suspended from an electro-bearer cable and adapted to be coupled with walls of the drilling so as to receive signals propagating in the surrounding formations. One or more expansible chambers are interconnected by ducts and suspended under a rigid body connected to the surface by the electro-bearer cable. Each expansible chamber includes flexible side walls into which are integrated at least one receiving element. The expansible chambers are adapted to be expanded by injecting a compressed fluid produced by a hydraulic system contained in the rigid body. The receiving elements are connected to a signal acquisition device disposed in the rigid body which communicates with a laboratory truck on a surface.
REFERENCES:
patent: 2396935 (1946-03-01), Walstrom
patent: 2963641 (1960-12-01), Nanz
patent: 4394754 (1983-07-01), Waters
Hardy, H. R., "Evaluating the Stability . . . Acoustic Emission"; Conference Fort Lauderdale, Fla., 1/17/74, pp. 89-94.
Rogozhnikov et al., "Design of an Ultrasound . . . Rock Mass"; Izv. Acad. Sci., USSR, Phys. Solid Earth (U.S.A.), #2, 2/70, pp. 124-126.
Institut Francais du Pe'trole
Moskowitz Nelson
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