Electrodeless spark discharge acoustic pulse transducer for bore

Details Electrodeless spark discharge acoustic pulse transducer for bore Electrodeless spark discharge acoustic pulse transducer for bore

1984-12-05

1987-03-17

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

181106, G01V 140

Patent

active

046513116

ABSTRACT:
An electrodeless spark discharge acoustic pulse transducer for borehold operations provides an insulating ceramic barrier which contains a small cross-section aperture separating two bodies of electrolyte through which the two zones of liquid make contact. The specific shape and geometry of the insulating barrier being exponentially shaped provides a means for controlling the waveform and frequency spectrum of the acoustic pulse. The transducer has an elastic outer housing and an elastic inner housing with hydraulic fluid between the inner and outer housings. The pressure of the hydraulic fluid may be increased to expand the outer housing against a borehole prior to a spark discharge. The transducer is also provided with a system for venting gas produced as a result of the spark discharge.

REFERENCES:
patent: 3403375 (1968-09-01), Wright, Jr. et al.
patent: 3428940 (1969-02-01), Huckabay
patent: 3458858 (1969-07-01), Wright, Jr.
patent: 3740708 (1973-06-01), Phillips
patent: 4039042 (1977-08-01), Edwards et al.
H. A. Wright, Jr., The Electrodeless Spark Underwater Sound Source, Jan. 8, 1970, entire report is pertinent, especially pp. 17-23.

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