Piezoelectric mud pulser for measurement-while-drilling applicat

Details Piezoelectric mud pulser for measurement-while-drilling applicat Piezoelectric mud pulser for measurement-while-drilling applicat

1991-01-23

1993-03-23

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367 83, 181106, 166250, 310330, H04R 1700

Patent

active

051970414

ABSTRACT:
A mud pulser for measurement-while-drilling applications is disclosed which employs piezoelectric transducers to provide for variations in the mud flow through a mud pulser sleeve. The piezoelectric transducers used in the mud pulser are comprised of two piezoelectric elements bonded together in a bender bar transducer configuration, thin metallic sheets to improve the rigidity of the transducer and to protect the ceramic material and electrodes from the effects of abrasive drilling fluid, and simplified mounting means.

REFERENCES:
patent: 3093760 (1963-06-01), Tarasevich
patent: 3302457 (1967-02-01), Mayes
patent: 4782910 (1988-11-01), Sims
patent: 4939405 (1990-07-01), Okuyama et al.

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