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Title: Shape memory alloy seals for geothermal applications

Abstract

A shape memory radial seal was fabricated with a ''U'' cross section. Upon heating the seal recovered its original ''V'' shape and produced a high pressure seal. The sealing pressure which can be developed is approximately 41 MPa (60,000 psi), well in excess of the pressure which can be produced in conventional elastomeric seals. The low modulus martensite can conform readily to the sealing surface, and upon recovery produce a seal capable of high pressure fluid or gas confinement. The corrosion resistance of nickel-titanium in a broad range of aggressive fluids has been well established and, as such, there is little doubt that, had time permitted, a geothermal pump of flange fluid tried would have been successful.

Publication Date:
Research Org.:
Memory Metals, Inc., Stamford, CT (USA)
OSTI Identifier:
5835945
Report Number(s):
DOE/ER/80108-T1
ON: DE86008099
DOE Contract Number:  
AC01-84ER80108
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; PUMPS; SEALS; FABRICATION; NITINOL; PERFORMANCE; SHAPE MEMORY EFFECT; ALLOYS; NICKEL ALLOYS; TITANIUM ALLOYS; Geothermal Legacy; 150901* - Geothermal Engineering- Drilling Technology & Well Hardware

Citation Formats

. Shape memory alloy seals for geothermal applications. United States: N. p., 1985. Web. doi:10.2172/5835945.
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. Shape memory alloy seals for geothermal applications. United States. https://doi.org/10.2172/5835945
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. 1985. "Shape memory alloy seals for geothermal applications". United States. https://doi.org/10.2172/5835945. https://www.osti.gov/servlets/purl/5835945.
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@article{osti_5835945,
title = {Shape memory alloy seals for geothermal applications},
author = {},
abstractNote = {A shape memory radial seal was fabricated with a ''U'' cross section. Upon heating the seal recovered its original ''V'' shape and produced a high pressure seal. The sealing pressure which can be developed is approximately 41 MPa (60,000 psi), well in excess of the pressure which can be produced in conventional elastomeric seals. The low modulus martensite can conform readily to the sealing surface, and upon recovery produce a seal capable of high pressure fluid or gas confinement. The corrosion resistance of nickel-titanium in a broad range of aggressive fluids has been well established and, as such, there is little doubt that, had time permitted, a geothermal pump of flange fluid tried would have been successful.},
doi = {10.2172/5835945},
url = {https://www.osti.gov/biblio/5835945}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 15 00:00:00 EDT 1985},
month = {Sun Sep 15 00:00:00 EDT 1985}
}
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Technical Report:
View Technical Report (0.52 MB)
https://doi.org/10.2172/5835945
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