Acoustic transducer
Abstract
An acoustic transducer is described comprising a one-piece hollow mandrel into the outer surface of which is formed a recess with sides perpendicular to the central axis of the mandrel and separated by a first distance and with a bottom parallel to the central axis and within which recess are a plurality of washer-shaped discs of a piezoelectric material and at least one disc of a temperature-compensating material with the discs being captured between the sides of the recess in a pre-stressed interference fit, typically at 2,000 psi of compressive stress. The transducer also includes a power supply and means to connect to a measurement device. The transducer is intended to be used for telemetry between a measurement device located downhole in an oil or gas well and the surface. The transducer is of an construction that is stronger with fewer joints that could leak fluids into the recess holding the piezoelectric elements than is found in previous acoustic transducers. 4 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia Corporation
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 563638
- Patent Number(s):
- 5,703,836
- Application Number:
- PAN: 8-620,057
- Assignee:
- Sandia Corp., Albuquerque, NM (United States) SNL; SCA: 020300; 030300; 440400; PA: EDB-98:013116; SN: 98001896291
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 30 Dec 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 02 PETROLEUM; 03 NATURAL GAS; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; TRANSDUCERS; DATA TRANSMISSION SYSTEMS; WELL LOGGING EQUIPMENT; OIL WELLS; NATURAL GAS WELLS; DESIGN; PIEZOELECTRICITY; OPERATION
Citation Formats
Drumheller, D.S. Acoustic transducer. United States: N. p., 1997.
Web.
Drumheller, D.S. Acoustic transducer. United States.
Drumheller, D.S. Tue .
"Acoustic transducer". United States.
@article{osti_563638,
title = {Acoustic transducer},
author = {Drumheller, D.S.},
abstractNote = {An acoustic transducer is described comprising a one-piece hollow mandrel into the outer surface of which is formed a recess with sides perpendicular to the central axis of the mandrel and separated by a first distance and with a bottom parallel to the central axis and within which recess are a plurality of washer-shaped discs of a piezoelectric material and at least one disc of a temperature-compensating material with the discs being captured between the sides of the recess in a pre-stressed interference fit, typically at 2,000 psi of compressive stress. The transducer also includes a power supply and means to connect to a measurement device. The transducer is intended to be used for telemetry between a measurement device located downhole in an oil or gas well and the surface. The transducer is of an construction that is stronger with fewer joints that could leak fluids into the recess holding the piezoelectric elements than is found in previous acoustic transducers. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {12}
}