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:
-
- 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):
-
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
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
- 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 = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}
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