Method of sealing a discontinuity within a gas main
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United States of America Patent
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Oct 20, 1992
Grant Date -
N/A
app pub date -
Sep 29, 1989
filing date -
Oct 4, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of sealing a joint in a gas main comprising boring a hole in the wall of the main at a point spaced from the joint, inserting into the main through the hole so formed a sealant spraying means, moving the spraying means to the site of the joint, pumping a settable anaerobic type sealant to the spraying means, causing the spraying means to spray the sealant onto the inner wall of the main to form a layer covering the joint, removing the spraying means through the hole and allowing the sealant to set.
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