Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1990-03-15
1991-02-12
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367 31, 367 75, 367911, 181106, 181120, G01V 140
Patent
active
049930010
ABSTRACT:
Method and apparatus for converting tube waves into body waves downhole for seismic exploration are disclosed, comprising a rotary valve tube wave source for producing swept frequency tube waves that are injected into a tubing or wellbore. The tube waves are converted to body waves by an elongate tube wave converter located at a selected position downhole. The tube wave converter comprises an elongate body that preferably substantially fills the wellbore or tubing and has a preferred shape in order to convert efficiently the tube waves to body waves at the selected position downhole.
REFERENCES:
patent: 2771960 (1956-11-01), Smith
patent: 3483505 (1969-12-01), Adair et al.
patent: 4632212 (1986-12-01), Benzing
patent: 4683557 (1987-07-01), Willis
patent: 4702343 (1987-10-01), Paulsson
patent: 4750583 (1988-06-01), Wolf
Fox J. David
Ramsey Mark S.
Winbow Graham A.
Exxon Production Research Company
Moskowitz Nelson
O'Niell Herbert E.
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