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1. WO2000019242 - TRANSDUCER AND MOUNTING FOR TRANSDUCER IN AN ACOUSTIC LOGGING APPARATUS

Publication Number WO/2000/019242
Publication Date 06.04.2000
International Application No. PCT/US1999/021982
International Filing Date 22.09.1999
Chapter 2 Demand Filed 20.04.2000
IPC
G01V 1/52 2006.1
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
40specially adapted for well-logging
52Structural details
G10K 11/00 2006.1
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
CPC
G01V 1/52
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
40specially adapted for well-logging
52Structural details
G10K 11/004
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
004Mounting transducers, e.g. provided with mechanical moving or orienting device
Applicants
  • DRESSER INDUSTRIES, INC. [US]/[US]
Inventors
  • WISNIEWSKI, Laurence, T.
  • ARIAN, Abbas
  • VARSAMIS, Georgios, L.
Agents
  • SPEIGHT, Howard, L.
Priority Data
09/161,05225.09.1998US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) TRANSDUCER AND MOUNTING FOR TRANSDUCER IN AN ACOUSTIC LOGGING APPARATUS
(FR) TRANSDUCTEUR ET MONTAGE DE CELUI-CI DANS UN APPAREIL DE DIAGRAPHIE ACOUSTIQUE
Abstract
(EN) An acoustic logging apparatus includes a tool body and a housing. A transducer operating in the bending mode is mounted in the housing. The transducer operates such that it is excited by or emits acoustic energy in only one of the two directions substantially perpendicular to the face of the transducer. The housing is mounted substantially removed from the axis of the body. An acoustic receiver includes an outer sleeve having a flange and a hat slidably mounted within the outer sleeve. The sliding of the hat compensates for variations in pressure and temperature. An acoustic transmitter includes a main housing and a hat slidably supported within the main housing. The sliding of the hat compensates for variations in pressure and temperature. Combinations of air gaps and o-rings in the transducer acoustically isolate a piezoelectric crystal from its housing and the housing from its enclosure. The acoustic receiver and acoustic transmitter are configured to be replaced in the field.
(FR) Ce dispositif de diagraphie acoustique comprend un corps d'outil et un logement, dans lequel on a monté un transducteur fonctionnant en mode flexion, de façon à être excité par une énergie acoustique ou à émettre celle-ci, dans une des deux directions qui soit sensiblement perpendiculaire à la face du transducteur. Le logement est monté sensiblement décalé de l'axe du corps. Un récepteur acoustique comprend un manchon extérieur présentant un rebord ainsi qu'un capuchon monté coulissant dans ce manchon extérieur, le coulissement de ce capuchon compensant les variations de pression et de température. Un émetteur acoustique comprend un logement principal ainsi qu'un capuchon supporté coulissant dans ce logement, le coulissement du capuchon compensant les variations de pression et de température. Dans ce transducteur, des combinaisons d'entrefers et de joints toriques isolent du logement, de manière acoustique, un cristal piézo-électrique, et isolent le logement de son enceinte. Le récepteur et l'émetteur acoustiques sont conçus pour être changés sur place.
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