Metal Sealing Packer Technology in Deep Boreholes
- Key words
- Metal packer, borehole seal, casing anchoring, HDR
- Conference
- European Geothermal Conference
- Year
- 1999
- Session
- Hot Dry Rock
- Language
- English
Full text
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Abstract
Early hydraulic I hydrofrac tests at the HDR geothermal test sites Bad Urach and Soultzsous- Forets were characterized by severe technical problems due to conventional (rubberbased) packer technology in hostile downhole environment (high temperature, high gas- and salt content of the borehole fluids). Various metal packer systems have since been developed during the past years to overcome these problems:
- Aluminum packers as part of a wreline hydrofrac straddle packer system to measure insitu stresses, consistlng of soft aluminum sleeves, which were successfully used down to approx. 3.5 km in the Soultz boreholes EPS-1 and GPK-1 and in the Urach-3 borehole.
- Copper- and stamless-steel packer elements for permanent and reliable borehole sealing at nuclear waste storage sites.
Copyright 1999, Bulletin d'HydrogÈologie, Peter Lang AG, Bern, Switzerland. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.