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Title: Extension method of drillstring component assembly

Abstract

A method of assembling transducer tools for down-hole applications wherein piezoelectric elements in the tools are pre-stressed by mechanically stretching an elastic mandrel about which the piezoelectric elements are positioned and subsequently releasing the mandrel so that it contracts causing the piezoelectric elements to be captured in an interference fit in a recess in the mandrel. The method can be adapted to embodiments where the recess in the mandrel is bound by two regions of the mandrel, itself, or where the recess is defined on one end by a portion of the mandrel and on the other end by a separate anvil member positioned against the piezoelectric elements and then secured to the mandrel.

Inventors:
 [1]
  1. Cedar Crest, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
873555
Patent Number(s):
6188647
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
B - PERFORMING OPERATIONS B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL B06B - METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
extension; method; drillstring; component; assembly; assembling; transducer; tools; down-hole; applications; piezoelectric; elements; pre-stressed; mechanically; stretching; elastic; mandrel; positioned; subsequently; releasing; contracts; causing; captured; interference; fit; recess; adapted; embodiments; bound; regions; defined; portion; separate; anvil; secured; interference fit; piezoelectric element; electric element; piezoelectric elements; component assembly; transducer tool; down-hole applications; electric elements; /367/29/

Citation Formats

Drumheller, Douglas S. Extension method of drillstring component assembly. United States: N. p., 2001. Web.
Drumheller, Douglas S. Extension method of drillstring component assembly. United States.
Drumheller, Douglas S. Mon . "Extension method of drillstring component assembly". United States. https://www.osti.gov/servlets/purl/873555.
@article{osti_873555,
title = {Extension method of drillstring component assembly},
author = {Drumheller, Douglas S},
abstractNote = {A method of assembling transducer tools for down-hole applications wherein piezoelectric elements in the tools are pre-stressed by mechanically stretching an elastic mandrel about which the piezoelectric elements are positioned and subsequently releasing the mandrel so that it contracts causing the piezoelectric elements to be captured in an interference fit in a recess in the mandrel. The method can be adapted to embodiments where the recess in the mandrel is bound by two regions of the mandrel, itself, or where the recess is defined on one end by a portion of the mandrel and on the other end by a separate anvil member positioned against the piezoelectric elements and then secured to the mandrel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}