Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1990-02-15
1991-08-27
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
181106, 181105, 310369, 310334, H04R 1700
Patent
active
050439529
ABSTRACT:
A monopole transmitter for a sonic well tool includes an axial tube, a piezoceramic cylinder surrounding the axial tube, an endcap disposed at each end of and firmly contacting the cylinder, and an apparatus for holding the endcaps firmly against the axial tube. The endcaps firmly contact the axial tube without simultaneously contacting an upper bulkhead. The apparatus may include spring washers disposed between the bulkhead and at least one endcap, or it may include a spring disposed between a nodal mount and each endcap. A nodal mounting tube may be disposed around the axial tube, a ring being disposed at each end of the nodal mounting tube, each ring being disposed outside of the cylinder, the apparatus including a spring disposed between each ring and an endcap outside of the cylinder for biasing the endcaps in tension against a ring thereby holding each endcap firmly in contact against the axial tube.
REFERENCES:
patent: 3277436 (1966-10-01), Fitzgerald et al.
patent: 3332057 (1967-07-01), Pavey
patent: 3583677 (1971-06-01), Phillips
patent: 4701892 (1987-10-01), Anderson
Aron Jeffrey B.
Booer Anthony K.
Hoyle David C.
Wignall Albert H.
Bouchard John H.
Eldred J. Woodrow
Garrana Henry N.
Kyle Deborah L.
Schlumberger Technology Corporation
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