Method for sealing between a lining and borehole, casing or pipeline
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United States of America Patent
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-
Feb 27, 1996
Grant Date -
N/A
app pub date -
Mar 23, 1995
filing date -
Mar 23, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
To seal the connection between an internal lining and external borehole, casing or pipeline, one or more elastically deformable annular seals are placed on the preform in a contracted state, in a configuration which does not impede insertion of the preform into the borehole, casing or pipeline. During expansion of the preform the seal itself forms an annular groove for receiving it in the exterior surface of the preform. After hardening of the preform a rigid lining is obtained having an integral seal. Applications include repair of boreholes, casings, especially in oil wells, or pipelines, by internal lining.
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