Leak repairing process for underground pipe

Details Leak repairing process for underground pipe Leak repairing process for underground pipe

1979-03-26

1981-01-13

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Repairing or restoring consumer used articles for reuse

138 97, F16L 100

Patent

active

042448956

ABSTRACT:
A method of repairing leaks in underground sewer pipe which includes the steps of closing the pipe at an upstream and a downstream position forming an enclosed section, filling the enclosed section with grout under pressure from a source and causing said grout to ooze through the leaks, replacing the grout in the enclosed section with a non-hardening liquid under pressure which prevents the grout which has oozed through the leaks from passing back into the enclosed section, and removing the non-hardening liquid from the enclosed section after the grout has hardened and sealed the leaks.

REFERENCES:
patent: 3356777 (1967-12-01), Barrett

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