skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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}
}